./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/array_3-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/array_3-2.i -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 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 09:44:51,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 09:44:51,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 09:44:51,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 09:44:51,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 09:44:51,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 09:44:51,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 09:44:51,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 09:44:51,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 09:44:51,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 09:44:51,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 09:44:51,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 09:44:51,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 09:44:51,202 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 09:44:51,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 09:44:51,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 09:44:51,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 09:44:51,210 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 09:44:51,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 09:44:51,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 09:44:51,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 09:44:51,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 09:44:51,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 09:44:51,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 09:44:51,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 09:44:51,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 09:44:51,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 09:44:51,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 09:44:51,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 09:44:51,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 09:44:51,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 09:44:51,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 09:44:51,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 09:44:51,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 09:44:51,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 09:44:51,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 09:44:51,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 09:44:51,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 09:44:51,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 09:44:51,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 09:44:51,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 09:44:51,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 09:44:51,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 09:44:51,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 09:44:51,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 09:44:51,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 09:44:51,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 09:44:51,256 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 09:44:51,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 09:44:51,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 09:44:51,257 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 09:44:51,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 09:44:51,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 09:44:51,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 09:44:51,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 09:44:51,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 09:44:51,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 09:44:51,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 09:44:51,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 09:44:51,258 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 09:44:51,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 09:44:51,258 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 09:44:51,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 09:44:51,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 09:44:51,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 09:44:51,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 09:44:51,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:44:51,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 09:44:51,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 09:44:51,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 09:44:51,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 09:44:51,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 09:44:51,260 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 09:44:51,260 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 09:44:51,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 09:44:51,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 09:44:51,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 42bdab47928922c9249a376933fe7b7a33d855d426cfe04eb271066ef5c44d0a [2021-12-17 09:44:51,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 09:44:51,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 09:44:51,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 09:44:51,461 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 09:44:51,462 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 09:44:51,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/array_3-2.i [2021-12-17 09:44:51,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f65c4c8/6f8f2703eba54f4aaccfd3a1d6b04890/FLAG7699b217a [2021-12-17 09:44:51,836 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 09:44:51,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/array_3-2.i [2021-12-17 09:44:51,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f65c4c8/6f8f2703eba54f4aaccfd3a1d6b04890/FLAG7699b217a [2021-12-17 09:44:51,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f65c4c8/6f8f2703eba54f4aaccfd3a1d6b04890 [2021-12-17 09:44:51,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 09:44:51,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 09:44:51,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 09:44:51,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 09:44:51,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 09:44:51,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:44:51" (1/1) ... [2021-12-17 09:44:51,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56481e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:51, skipping insertion in model container [2021-12-17 09:44:51,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:44:51" (1/1) ... [2021-12-17 09:44:51,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 09:44:51,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 09:44:51,986 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/loop-acceleration/array_3-2.i[809,822] [2021-12-17 09:44:51,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:44:51,997 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 09:44:52,005 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/loop-acceleration/array_3-2.i[809,822] [2021-12-17 09:44:52,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:44:52,017 INFO L208 MainTranslator]: Completed translation [2021-12-17 09:44:52,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52 WrapperNode [2021-12-17 09:44:52,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 09:44:52,018 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 09:44:52,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 09:44:52,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 09:44:52,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52" (1/1) ... [2021-12-17 09:44:52,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52" (1/1) ... [2021-12-17 09:44:52,044 INFO L137 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 47 [2021-12-17 09:44:52,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 09:44:52,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 09:44:52,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 09:44:52,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 09:44:52,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52" (1/1) ... [2021-12-17 09:44:52,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52" (1/1) ... [2021-12-17 09:44:52,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52" (1/1) ... [2021-12-17 09:44:52,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52" (1/1) ... [2021-12-17 09:44:52,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52" (1/1) ... [2021-12-17 09:44:52,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52" (1/1) ... [2021-12-17 09:44:52,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52" (1/1) ... [2021-12-17 09:44:52,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 09:44:52,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 09:44:52,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 09:44:52,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 09:44:52,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52" (1/1) ... [2021-12-17 09:44:52,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:44:52,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:44:52,088 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) [2021-12-17 09:44:52,096 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 [2021-12-17 09:44:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 09:44:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 09:44:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 09:44:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 09:44:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 09:44:52,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 09:44:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 09:44:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 09:44:52,158 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 09:44:52,159 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 09:44:52,233 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 09:44:52,237 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 09:44:52,237 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 09:44:52,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:44:52 BoogieIcfgContainer [2021-12-17 09:44:52,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 09:44:52,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 09:44:52,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 09:44:52,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 09:44:52,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:44:51" (1/3) ... [2021-12-17 09:44:52,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bbc9cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:44:52, skipping insertion in model container [2021-12-17 09:44:52,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:44:52" (2/3) ... [2021-12-17 09:44:52,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bbc9cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:44:52, skipping insertion in model container [2021-12-17 09:44:52,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:44:52" (3/3) ... [2021-12-17 09:44:52,256 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2021-12-17 09:44:52,260 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 09:44:52,260 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 09:44:52,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 09:44:52,294 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 [2021-12-17 09:44:52,295 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 09:44:52,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:52,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-17 09:44:52,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:44:52,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:44:52,309 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:44:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:44:52,313 INFO L85 PathProgramCache]: Analyzing trace with hash 212441967, now seen corresponding path program 1 times [2021-12-17 09:44:52,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:44:52,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214775105] [2021-12-17 09:44:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:44:52,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:44:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:44:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:44:52,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:44:52,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214775105] [2021-12-17 09:44:52,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214775105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:44:52,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:44:52,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 09:44:52,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341627725] [2021-12-17 09:44:52,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:44:52,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 09:44:52,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:44:52,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 09:44:52,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:44:52,449 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-12-17 09:44:52,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:44:52,475 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2021-12-17 09:44:52,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 09:44:52,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2021-12-17 09:44:52,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:44:52,483 INFO L225 Difference]: With dead ends: 44 [2021-12-17 09:44:52,483 INFO L226 Difference]: Without dead ends: 23 [2021-12-17 09:44:52,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 09:44:52,488 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:44:52,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:44:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-17 09:44:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2021-12-17 09:44:52,509 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) [2021-12-17 09:44:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-12-17 09:44:52,510 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-12-17 09:44:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:44:52,510 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-12-17 09:44:52,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-12-17 09:44:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-12-17 09:44:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-17 09:44:52,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:44:52,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:44:52,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 09:44:52,517 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:44:52,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:44:52,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1195372026, now seen corresponding path program 1 times [2021-12-17 09:44:52,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:44:52,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934202871] [2021-12-17 09:44:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:44:52,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:44:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:44:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:44:52,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:44:52,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934202871] [2021-12-17 09:44:52,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934202871] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:44:52,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077241060] [2021-12-17 09:44:52,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:44:52,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:44:52,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:44:52,597 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) [2021-12-17 09:44:52,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 09:44:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:44:52,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 09:44:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:44:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:44:52,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:44:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:44:52,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077241060] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:44:52,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:44:52,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-17 09:44:52,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387921169] [2021-12-17 09:44:52,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:44:52,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 09:44:52,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:44:52,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 09:44:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-17 09:44:52,769 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:44:52,818 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-12-17 09:44:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 09:44:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-17 09:44:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:44:52,820 INFO L225 Difference]: With dead ends: 61 [2021-12-17 09:44:52,820 INFO L226 Difference]: Without dead ends: 52 [2021-12-17 09:44:52,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-17 09:44:52,821 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 70 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:44:52,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:44:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-17 09:44:52,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 20. [2021-12-17 09:44:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-12-17 09:44:52,825 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2021-12-17 09:44:52,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:44:52,826 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-12-17 09:44:52,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:52,826 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-12-17 09:44:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 09:44:52,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:44:52,827 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:44:52,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 09:44:53,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:44:53,030 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:44:53,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:44:53,031 INFO L85 PathProgramCache]: Analyzing trace with hash -328971648, now seen corresponding path program 2 times [2021-12-17 09:44:53,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:44:53,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884405993] [2021-12-17 09:44:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:44:53,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:44:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:44:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 09:44:53,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:44:53,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884405993] [2021-12-17 09:44:53,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884405993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:44:53,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:44:53,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 09:44:53,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097140939] [2021-12-17 09:44:53,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:44:53,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 09:44:53,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:44:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 09:44:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 09:44:53,135 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:44:53,158 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-12-17 09:44:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 09:44:53,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 18 [2021-12-17 09:44:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:44:53,161 INFO L225 Difference]: With dead ends: 28 [2021-12-17 09:44:53,162 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 09:44:53,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 09:44:53,166 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:44:53,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:44:53,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 09:44:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-12-17 09:44:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:53,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-12-17 09:44:53,173 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2021-12-17 09:44:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:44:53,173 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-12-17 09:44:53,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:53,174 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-12-17 09:44:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 09:44:53,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:44:53,174 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:44:53,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 09:44:53,175 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:44:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:44:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash 222661349, now seen corresponding path program 1 times [2021-12-17 09:44:53,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:44:53,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38921684] [2021-12-17 09:44:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:44:53,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:44:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:44:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 09:44:53,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:44:53,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38921684] [2021-12-17 09:44:53,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38921684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:44:53,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140741814] [2021-12-17 09:44:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:44:53,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:44:53,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:44:53,232 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) [2021-12-17 09:44:53,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 09:44:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:44:53,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 09:44:53,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:44:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 09:44:53,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:44:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 09:44:53,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140741814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:44:53,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:44:53,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2021-12-17 09:44:53,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73167247] [2021-12-17 09:44:53,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:44:53,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 09:44:53,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:44:53,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 09:44:53,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-12-17 09:44:53,443 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:44:53,566 INFO L93 Difference]: Finished difference Result 112 states and 136 transitions. [2021-12-17 09:44:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 09:44:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-17 09:44:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:44:53,567 INFO L225 Difference]: With dead ends: 112 [2021-12-17 09:44:53,567 INFO L226 Difference]: Without dead ends: 92 [2021-12-17 09:44:53,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-12-17 09:44:53,568 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 148 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:44:53,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 68 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:44:53,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-17 09:44:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 51. [2021-12-17 09:44:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 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) [2021-12-17 09:44:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-12-17 09:44:53,573 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 22 [2021-12-17 09:44:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:44:53,573 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-12-17 09:44:53,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-12-17 09:44:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 09:44:53,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:44:53,580 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:44:53,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 09:44:53,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 09:44:53,799 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:44:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:44:53,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1174972677, now seen corresponding path program 2 times [2021-12-17 09:44:53,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:44:53,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624460353] [2021-12-17 09:44:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:44:53,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:44:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:44:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-17 09:44:53,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:44:53,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624460353] [2021-12-17 09:44:53,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624460353] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:44:53,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487300550] [2021-12-17 09:44:53,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:44:53,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:44:53,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:44:53,932 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) [2021-12-17 09:44:53,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 09:44:53,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:44:53,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:44:53,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 09:44:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:44:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-17 09:44:54,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:44:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-17 09:44:54,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487300550] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:44:54,309 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:44:54,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-17 09:44:54,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728850636] [2021-12-17 09:44:54,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:44:54,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-17 09:44:54,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:44:54,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-17 09:44:54,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-17 09:44:54,311 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2021-12-17 09:44:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:44:54,504 INFO L93 Difference]: Finished difference Result 240 states and 282 transitions. [2021-12-17 09:44:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 09:44:54,504 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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 50 [2021-12-17 09:44:54,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:44:54,505 INFO L225 Difference]: With dead ends: 240 [2021-12-17 09:44:54,505 INFO L226 Difference]: Without dead ends: 212 [2021-12-17 09:44:54,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-17 09:44:54,506 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 557 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 09:44:54,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 113 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 09:44:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-17 09:44:54,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 75. [2021-12-17 09:44:54,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-12-17 09:44:54,513 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 50 [2021-12-17 09:44:54,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:44:54,513 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-12-17 09:44:54,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2021-12-17 09:44:54,513 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-12-17 09:44:54,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 09:44:54,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:44:54,515 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:44:54,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 09:44:54,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:44:54,724 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:44:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:44:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1782423069, now seen corresponding path program 3 times [2021-12-17 09:44:54,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:44:54,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225718693] [2021-12-17 09:44:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:44:54,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:44:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:44:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-17 09:44:54,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:44:54,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225718693] [2021-12-17 09:44:54,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225718693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:44:54,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175070750] [2021-12-17 09:44:54,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 09:44:54,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:44:54,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:44:54,988 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) [2021-12-17 09:44:54,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 09:44:55,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-17 09:44:55,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:44:55,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 09:44:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:44:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-17 09:44:55,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:44:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-17 09:44:55,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175070750] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:44:55,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:44:55,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 33 [2021-12-17 09:44:55,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422256080] [2021-12-17 09:44:55,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:44:55,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 09:44:55,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:44:55,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 09:44:55,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 09:44:55,361 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:44:55,862 INFO L93 Difference]: Finished difference Result 263 states and 331 transitions. [2021-12-17 09:44:55,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 09:44:55,862 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-17 09:44:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:44:55,863 INFO L225 Difference]: With dead ends: 263 [2021-12-17 09:44:55,863 INFO L226 Difference]: Without dead ends: 187 [2021-12-17 09:44:55,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1146, Invalid=2046, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 09:44:55,865 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 437 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 09:44:55,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 118 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 09:44:55,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-17 09:44:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2021-12-17 09:44:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.173913043478261) internal successors, (216), 184 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 216 transitions. [2021-12-17 09:44:55,892 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 216 transitions. Word has length 74 [2021-12-17 09:44:55,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:44:55,892 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 216 transitions. [2021-12-17 09:44:55,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.3636363636363638) internal successors, (111), 33 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 216 transitions. [2021-12-17 09:44:55,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-17 09:44:55,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:44:55,895 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:44:55,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 09:44:56,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:44:56,111 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:44:56,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:44:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1491474595, now seen corresponding path program 4 times [2021-12-17 09:44:56,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:44:56,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271479996] [2021-12-17 09:44:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:44:56,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:44:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:44:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-12-17 09:44:56,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:44:56,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271479996] [2021-12-17 09:44:56,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271479996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:44:56,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702077963] [2021-12-17 09:44:56,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 09:44:56,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:44:56,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:44:56,593 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) [2021-12-17 09:44:56,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 09:44:56,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 09:44:56,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:44:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-17 09:44:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:44:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-12-17 09:44:56,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:44:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-12-17 09:44:57,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702077963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:44:57,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:44:57,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2021-12-17 09:44:57,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830536140] [2021-12-17 09:44:57,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:44:57,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-17 09:44:57,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:44:57,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-17 09:44:57,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-12-17 09:44:57,984 INFO L87 Difference]: Start difference. First operand 185 states and 216 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:58,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:44:58,511 INFO L93 Difference]: Finished difference Result 620 states and 743 transitions. [2021-12-17 09:44:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-17 09:44:58,511 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-12-17 09:44:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:44:58,513 INFO L225 Difference]: With dead ends: 620 [2021-12-17 09:44:58,514 INFO L226 Difference]: Without dead ends: 496 [2021-12-17 09:44:58,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-12-17 09:44:58,516 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1486 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 09:44:58,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 246 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 09:44:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-17 09:44:58,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 247. [2021-12-17 09:44:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.1300813008130082) internal successors, (278), 246 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:58,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 278 transitions. [2021-12-17 09:44:58,526 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 278 transitions. Word has length 184 [2021-12-17 09:44:58,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:44:58,526 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 278 transitions. [2021-12-17 09:44:58,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:44:58,527 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 278 transitions. [2021-12-17 09:44:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-17 09:44:58,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:44:58,529 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:44:58,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 09:44:58,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:44:58,748 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:44:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:44:58,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1053396639, now seen corresponding path program 5 times [2021-12-17 09:44:58,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:44:58,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121666511] [2021-12-17 09:44:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:44:58,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:44:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:45:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-12-17 09:45:00,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:45:00,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121666511] [2021-12-17 09:45:00,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121666511] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:45:00,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102992854] [2021-12-17 09:45:00,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 09:45:00,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:45:00,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:45:00,041 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) [2021-12-17 09:45:00,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 09:46:35,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2021-12-17 09:46:35,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:46:35,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-17 09:46:35,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:46:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-12-17 09:46:35,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:46:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5311 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-12-17 09:46:39,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102992854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:46:39,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:46:39,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 125 [2021-12-17 09:46:39,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867914131] [2021-12-17 09:46:39,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:46:39,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-12-17 09:46:39,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:46:39,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-12-17 09:46:39,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2021-12-17 09:46:39,247 INFO L87 Difference]: Start difference. First operand 247 states and 278 transitions. Second operand has 125 states, 125 states have (on average 2.056) internal successors, (257), 125 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:46:43,355 INFO L93 Difference]: Finished difference Result 1240 states and 1456 transitions. [2021-12-17 09:46:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-12-17 09:46:43,355 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.056) internal successors, (257), 125 states have internal predecessors, (257), 0 states have call successors, (0), 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 246 [2021-12-17 09:46:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:46:43,358 INFO L225 Difference]: With dead ends: 1240 [2021-12-17 09:46:43,358 INFO L226 Difference]: Without dead ends: 1116 [2021-12-17 09:46:43,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2021-12-17 09:46:43,362 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3246 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3246 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 09:46:43,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3246 Valid, 565 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 09:46:43,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-12-17 09:46:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 371. [2021-12-17 09:46:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.0864864864864865) internal successors, (402), 370 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 402 transitions. [2021-12-17 09:46:43,373 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 402 transitions. Word has length 246 [2021-12-17 09:46:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:46:43,374 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 402 transitions. [2021-12-17 09:46:43,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.056) internal successors, (257), 125 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 09:46:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 402 transitions. [2021-12-17 09:46:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-12-17 09:46:43,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:46:43,378 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:46:43,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 09:46:43,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:43,579 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:46:43,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:46:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash -416450211, now seen corresponding path program 6 times [2021-12-17 09:46:43,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:46:43,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246093813] [2021-12-17 09:46:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:46:43,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:46:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:46:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16595 backedges. 0 proven. 14884 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2021-12-17 09:46:47,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:46:47,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246093813] [2021-12-17 09:46:47,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246093813] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:46:47,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441412012] [2021-12-17 09:46:47,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 09:46:47,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:46:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:46:47,960 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) [2021-12-17 09:46:47,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process Killed by 15