./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a94ea84ce989fbbbaf2c8eaba75d5160290d15621b4e8c8582440d0d85685d8d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:59:39,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:59:39,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:59:39,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:59:39,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:59:39,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:59:39,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:59:39,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:59:39,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:59:39,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:59:39,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:59:39,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:59:39,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:59:39,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:59:39,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:59:39,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:59:39,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:59:39,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:59:39,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:59:39,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:59:39,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:59:39,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:59:39,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:59:39,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:59:39,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:59:39,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:59:39,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:59:39,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:59:39,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:59:39,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:59:39,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:59:39,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:59:39,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:59:39,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:59:39,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:59:39,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:59:39,260 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:59:39,260 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:59:39,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:59:39,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:59:39,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:59:39,263 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:59:39,289 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:59:39,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:59:39,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:59:39,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:59:39,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:59:39,291 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:59:39,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:59:39,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:59:39,291 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:59:39,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:59:39,292 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:59:39,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:59:39,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:59:39,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:59:39,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:59:39,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:59:39,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:59:39,293 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:59:39,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:59:39,294 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:59:39,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:59:39,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:59:39,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:59:39,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:59:39,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:59:39,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:59:39,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:59:39,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:59:39,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:59:39,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:59:39,296 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:59:39,296 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:59:39,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:59:39,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:59:39,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a94ea84ce989fbbbaf2c8eaba75d5160290d15621b4e8c8582440d0d85685d8d [2021-12-15 21:59:39,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:59:39,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:59:39,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:59:39,554 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:59:39,554 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:59:39,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c [2021-12-15 21:59:39,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f915698/62124f92385c40539dddb56bb1f731b9/FLAGd857090f6 [2021-12-15 21:59:40,115 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:59:40,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c [2021-12-15 21:59:40,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f915698/62124f92385c40539dddb56bb1f731b9/FLAGd857090f6 [2021-12-15 21:59:40,592 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7f915698/62124f92385c40539dddb56bb1f731b9 [2021-12-15 21:59:40,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:59:40,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:59:40,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:59:40,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:59:40,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:59:40,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:59:40" (1/1) ... [2021-12-15 21:59:40,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2272a6f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:40, skipping insertion in model container [2021-12-15 21:59:40,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:59:40" (1/1) ... [2021-12-15 21:59:40,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:59:40,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:59:41,060 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/openssl/s3_clnt.blast.01.i.cil-1.c[65523,65536] [2021-12-15 21:59:41,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:59:41,080 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:59:41,139 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/openssl/s3_clnt.blast.01.i.cil-1.c[65523,65536] [2021-12-15 21:59:41,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:59:41,152 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:59:41,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41 WrapperNode [2021-12-15 21:59:41,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:59:41,155 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:59:41,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:59:41,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:59:41,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41" (1/1) ... [2021-12-15 21:59:41,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41" (1/1) ... [2021-12-15 21:59:41,232 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 724 [2021-12-15 21:59:41,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:59:41,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:59:41,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:59:41,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:59:41,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41" (1/1) ... [2021-12-15 21:59:41,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41" (1/1) ... [2021-12-15 21:59:41,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41" (1/1) ... [2021-12-15 21:59:41,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41" (1/1) ... [2021-12-15 21:59:41,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41" (1/1) ... [2021-12-15 21:59:41,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41" (1/1) ... [2021-12-15 21:59:41,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41" (1/1) ... [2021-12-15 21:59:41,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:59:41,307 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:59:41,307 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:59:41,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:59:41,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41" (1/1) ... [2021-12-15 21:59:41,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:59:41,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:59:41,354 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 21:59:41,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 21:59:41,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:59:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 21:59:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:59:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:59:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 21:59:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:59:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 21:59:41,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:59:41,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:59:41,549 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:59:41,550 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:59:41,564 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 21:59:44,181 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-12-15 21:59:44,182 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-12-15 21:59:44,182 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:59:44,187 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:59:44,187 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 21:59:44,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:59:44 BoogieIcfgContainer [2021-12-15 21:59:44,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:59:44,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:59:44,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:59:44,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:59:44,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:59:40" (1/3) ... [2021-12-15 21:59:44,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbb1eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:59:44, skipping insertion in model container [2021-12-15 21:59:44,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:59:41" (2/3) ... [2021-12-15 21:59:44,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbb1eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:59:44, skipping insertion in model container [2021-12-15 21:59:44,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:59:44" (3/3) ... [2021-12-15 21:59:44,208 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.01.i.cil-1.c [2021-12-15 21:59:44,212 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:59:44,212 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:59:44,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:59:44,289 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 21:59:44,289 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:59:44,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 21:59:44,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:59:44,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:59:44,322 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:59:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:59:44,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1457703966, now seen corresponding path program 1 times [2021-12-15 21:59:44,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:59:44,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244969976] [2021-12-15 21:59:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:59:44,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:59:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:59:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:59:44,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:59:44,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244969976] [2021-12-15 21:59:44,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244969976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:59:44,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:59:44,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:59:44,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756437305] [2021-12-15 21:59:44,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:59:44,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:59:44,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:59:44,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:59:44,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:59:44,966 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:46,992 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 21:59:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:59:47,400 INFO L93 Difference]: Finished difference Result 365 states and 610 transitions. [2021-12-15 21:59:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:59:47,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-15 21:59:47,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:59:47,424 INFO L225 Difference]: With dead ends: 365 [2021-12-15 21:59:47,429 INFO L226 Difference]: Without dead ends: 208 [2021-12-15 21:59:47,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:59:47,436 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 143 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 21:59:47,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 381 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 21:59:47,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-15 21:59:47,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 138. [2021-12-15 21:59:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.5547445255474452) internal successors, (213), 137 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 213 transitions. [2021-12-15 21:59:47,512 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 213 transitions. Word has length 24 [2021-12-15 21:59:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:59:47,513 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 213 transitions. [2021-12-15 21:59:47,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:47,514 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 213 transitions. [2021-12-15 21:59:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 21:59:47,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:59:47,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:59:47,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:59:47,517 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:59:47,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:59:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2051399351, now seen corresponding path program 1 times [2021-12-15 21:59:47,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:59:47,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586190761] [2021-12-15 21:59:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:59:47,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:59:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:59:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:59:47,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:59:47,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586190761] [2021-12-15 21:59:47,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586190761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:59:47,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:59:47,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:59:47,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190701024] [2021-12-15 21:59:47,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:59:47,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:59:47,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:59:47,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:59:47,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:59:47,783 INFO L87 Difference]: Start difference. First operand 138 states and 213 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:49,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 21:59:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:59:49,971 INFO L93 Difference]: Finished difference Result 273 states and 420 transitions. [2021-12-15 21:59:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:59:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 21:59:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:59:49,973 INFO L225 Difference]: With dead ends: 273 [2021-12-15 21:59:49,973 INFO L226 Difference]: Without dead ends: 142 [2021-12-15 21:59:49,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:59:49,975 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:59:49,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 409 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 21:59:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-12-15 21:59:49,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-12-15 21:59:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.542857142857143) internal successors, (216), 140 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) [2021-12-15 21:59:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 216 transitions. [2021-12-15 21:59:49,984 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 216 transitions. Word has length 25 [2021-12-15 21:59:49,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:59:49,985 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 216 transitions. [2021-12-15 21:59:49,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 216 transitions. [2021-12-15 21:59:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-15 21:59:49,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:59:49,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:59:49,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:59:49,987 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:59:49,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:59:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash 225377997, now seen corresponding path program 1 times [2021-12-15 21:59:49,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:59:49,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838577732] [2021-12-15 21:59:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:59:49,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:59:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:59:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 21:59:50,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:59:50,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838577732] [2021-12-15 21:59:50,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838577732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:59:50,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:59:50,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:59:50,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90497696] [2021-12-15 21:59:50,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:59:50,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:59:50,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:59:50,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:59:50,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:59:50,197 INFO L87 Difference]: Start difference. First operand 141 states and 216 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:59:50,225 INFO L93 Difference]: Finished difference Result 399 states and 616 transitions. [2021-12-15 21:59:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:59:50,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-15 21:59:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:59:50,227 INFO L225 Difference]: With dead ends: 399 [2021-12-15 21:59:50,227 INFO L226 Difference]: Without dead ends: 268 [2021-12-15 21:59:50,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:59:50,229 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 124 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:59:50,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 314 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:59:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-12-15 21:59:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2021-12-15 21:59:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5280898876404494) internal successors, (408), 267 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 408 transitions. [2021-12-15 21:59:50,242 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 408 transitions. Word has length 40 [2021-12-15 21:59:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:59:50,242 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 408 transitions. [2021-12-15 21:59:50,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 408 transitions. [2021-12-15 21:59:50,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 21:59:50,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:59:50,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:59:50,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 21:59:50,245 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:59:50,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:59:50,246 INFO L85 PathProgramCache]: Analyzing trace with hash 61485208, now seen corresponding path program 1 times [2021-12-15 21:59:50,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:59:50,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570221154] [2021-12-15 21:59:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:59:50,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:59:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:59:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-15 21:59:50,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:59:50,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570221154] [2021-12-15 21:59:50,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570221154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:59:50,468 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:59:50,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 21:59:50,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428798510] [2021-12-15 21:59:50,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:59:50,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 21:59:50,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:59:50,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 21:59:50,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:59:50,470 INFO L87 Difference]: Start difference. First operand 268 states and 408 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:52,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 21:59:52,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:59:52,519 INFO L93 Difference]: Finished difference Result 525 states and 807 transitions. [2021-12-15 21:59:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 21:59:52,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 21:59:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:59:52,521 INFO L225 Difference]: With dead ends: 525 [2021-12-15 21:59:52,521 INFO L226 Difference]: Without dead ends: 394 [2021-12-15 21:59:52,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 21:59:52,523 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 125 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:59:52,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 467 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 21:59:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-12-15 21:59:52,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-12-15 21:59:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.5241730279898218) internal successors, (599), 393 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 599 transitions. [2021-12-15 21:59:52,547 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 599 transitions. Word has length 55 [2021-12-15 21:59:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:59:52,549 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 599 transitions. [2021-12-15 21:59:52,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 599 transitions. [2021-12-15 21:59:52,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 21:59:52,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:59:52,555 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:59:52,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 21:59:52,555 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:59:52,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:59:52,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1405257089, now seen corresponding path program 1 times [2021-12-15 21:59:52,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:59:52,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395622597] [2021-12-15 21:59:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:59:52,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:59:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:59:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 21:59:52,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:59:52,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395622597] [2021-12-15 21:59:52,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395622597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:59:52,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:59:52,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:59:52,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415650081] [2021-12-15 21:59:52,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:59:52,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:59:52,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:59:52,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:59:52,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:59:52,731 INFO L87 Difference]: Start difference. First operand 394 states and 599 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:54,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 21:59:56,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 21:59:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:59:57,051 INFO L93 Difference]: Finished difference Result 958 states and 1455 transitions. [2021-12-15 21:59:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:59:57,052 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-15 21:59:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:59:57,054 INFO L225 Difference]: With dead ends: 958 [2021-12-15 21:59:57,055 INFO L226 Difference]: Without dead ends: 574 [2021-12-15 21:59:57,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:59:57,056 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 92 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 21:59:57,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 558 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 21:59:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-12-15 21:59:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 446. [2021-12-15 21:59:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.543820224719101) internal successors, (687), 445 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 687 transitions. [2021-12-15 21:59:57,065 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 687 transitions. Word has length 73 [2021-12-15 21:59:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:59:57,066 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 687 transitions. [2021-12-15 21:59:57,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:57,066 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 687 transitions. [2021-12-15 21:59:57,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-15 21:59:57,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:59:57,067 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:59:57,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 21:59:57,067 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:59:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:59:57,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1545805699, now seen corresponding path program 1 times [2021-12-15 21:59:57,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:59:57,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735294107] [2021-12-15 21:59:57,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:59:57,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:59:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:59:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 21:59:57,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:59:57,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735294107] [2021-12-15 21:59:57,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735294107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:59:57,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:59:57,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:59:57,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660356036] [2021-12-15 21:59:57,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:59:57,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:59:57,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:59:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:59:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:59:57,220 INFO L87 Difference]: Start difference. First operand 446 states and 687 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:59,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 21:59:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:59:59,491 INFO L93 Difference]: Finished difference Result 1157 states and 1771 transitions. [2021-12-15 21:59:59,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:59:59,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-12-15 21:59:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:59:59,495 INFO L225 Difference]: With dead ends: 1157 [2021-12-15 21:59:59,495 INFO L226 Difference]: Without dead ends: 721 [2021-12-15 21:59:59,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 21:59:59,497 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 108 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 21:59:59,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 270 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 21:59:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-15 21:59:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 469. [2021-12-15 21:59:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.561965811965812) internal successors, (731), 468 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 731 transitions. [2021-12-15 21:59:59,513 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 731 transitions. Word has length 73 [2021-12-15 21:59:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:59:59,515 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 731 transitions. [2021-12-15 21:59:59,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:59:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 731 transitions. [2021-12-15 21:59:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 21:59:59,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:59:59,517 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:59:59,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 21:59:59,518 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:59:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:59:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1310455098, now seen corresponding path program 1 times [2021-12-15 21:59:59,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:59:59,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905431467] [2021-12-15 21:59:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:59:59,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:59:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:59:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 21:59:59,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:59:59,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905431467] [2021-12-15 21:59:59,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905431467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:59:59,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:59:59,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:59:59,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110869545] [2021-12-15 21:59:59,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:59:59,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:59:59,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:59:59,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:59:59,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:59:59,688 INFO L87 Difference]: Start difference. First operand 469 states and 731 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:01,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:03,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:04,053 INFO L93 Difference]: Finished difference Result 1108 states and 1717 transitions. [2021-12-15 22:00:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:04,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 93 [2021-12-15 22:00:04,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:04,057 INFO L225 Difference]: With dead ends: 1108 [2021-12-15 22:00:04,057 INFO L226 Difference]: Without dead ends: 649 [2021-12-15 22:00:04,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:04,059 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 94 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:04,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 558 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:00:04,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-15 22:00:04,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 515. [2021-12-15 22:00:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.5739299610894941) internal successors, (809), 514 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 809 transitions. [2021-12-15 22:00:04,070 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 809 transitions. Word has length 93 [2021-12-15 22:00:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:04,070 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 809 transitions. [2021-12-15 22:00:04,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 809 transitions. [2021-12-15 22:00:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 22:00:04,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:04,073 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:04,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:00:04,073 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:04,074 INFO L85 PathProgramCache]: Analyzing trace with hash -416968760, now seen corresponding path program 1 times [2021-12-15 22:00:04,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:04,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541913911] [2021-12-15 22:00:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:04,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-15 22:00:04,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:04,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541913911] [2021-12-15 22:00:04,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541913911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:04,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:04,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:04,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246028572] [2021-12-15 22:00:04,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:04,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:04,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:04,223 INFO L87 Difference]: Start difference. First operand 515 states and 809 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:06,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:08,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:08,413 INFO L93 Difference]: Finished difference Result 1104 states and 1729 transitions. [2021-12-15 22:00:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:08,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-15 22:00:08,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:08,417 INFO L225 Difference]: With dead ends: 1104 [2021-12-15 22:00:08,417 INFO L226 Difference]: Without dead ends: 599 [2021-12-15 22:00:08,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:08,418 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 38 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:08,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 496 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-12-15 22:00:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-12-15 22:00:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 555. [2021-12-15 22:00:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 1.5830324909747293) internal successors, (877), 554 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 877 transitions. [2021-12-15 22:00:08,440 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 877 transitions. Word has length 93 [2021-12-15 22:00:08,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:08,440 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 877 transitions. [2021-12-15 22:00:08,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 877 transitions. [2021-12-15 22:00:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-15 22:00:08,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:08,442 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:08,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:00:08,442 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:08,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:08,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1810547741, now seen corresponding path program 1 times [2021-12-15 22:00:08,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:08,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233610014] [2021-12-15 22:00:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:08,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:08,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233610014] [2021-12-15 22:00:08,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233610014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:08,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:08,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:08,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472082835] [2021-12-15 22:00:08,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:08,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:08,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:08,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:08,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:08,609 INFO L87 Difference]: Start difference. First operand 555 states and 877 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:10,619 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:12,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:12,898 INFO L93 Difference]: Finished difference Result 1228 states and 1922 transitions. [2021-12-15 22:00:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:12,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-12-15 22:00:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:12,902 INFO L225 Difference]: With dead ends: 1228 [2021-12-15 22:00:12,902 INFO L226 Difference]: Without dead ends: 683 [2021-12-15 22:00:12,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:12,904 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 89 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:12,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 550 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:00:12,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-12-15 22:00:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 557. [2021-12-15 22:00:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.580935251798561) internal successors, (879), 556 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 879 transitions. [2021-12-15 22:00:12,914 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 879 transitions. Word has length 94 [2021-12-15 22:00:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:12,915 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 879 transitions. [2021-12-15 22:00:12,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 879 transitions. [2021-12-15 22:00:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 22:00:12,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:12,916 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:12,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:00:12,917 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:12,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1953954568, now seen corresponding path program 2 times [2021-12-15 22:00:12,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:12,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430548637] [2021-12-15 22:00:12,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:12,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:13,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:13,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430548637] [2021-12-15 22:00:13,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430548637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:13,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:13,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:13,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647247759] [2021-12-15 22:00:13,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:13,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:13,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:13,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:13,100 INFO L87 Difference]: Start difference. First operand 557 states and 879 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:15,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:17,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:17,366 INFO L93 Difference]: Finished difference Result 1301 states and 2017 transitions. [2021-12-15 22:00:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:17,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 22:00:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:17,369 INFO L225 Difference]: With dead ends: 1301 [2021-12-15 22:00:17,369 INFO L226 Difference]: Without dead ends: 754 [2021-12-15 22:00:17,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:17,370 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 113 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:17,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 288 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-12-15 22:00:17,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-12-15 22:00:17,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 557. [2021-12-15 22:00:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.5629496402877698) internal successors, (869), 556 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 869 transitions. [2021-12-15 22:00:17,381 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 869 transitions. Word has length 108 [2021-12-15 22:00:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:17,381 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 869 transitions. [2021-12-15 22:00:17,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 869 transitions. [2021-12-15 22:00:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 22:00:17,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:17,382 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:17,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:00:17,383 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:17,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:17,383 INFO L85 PathProgramCache]: Analyzing trace with hash -410262870, now seen corresponding path program 1 times [2021-12-15 22:00:17,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:17,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837894759] [2021-12-15 22:00:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:17,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:17,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:17,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837894759] [2021-12-15 22:00:17,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837894759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:17,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:17,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:17,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099478507] [2021-12-15 22:00:17,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:17,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:17,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:17,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:17,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:17,603 INFO L87 Difference]: Start difference. First operand 557 states and 869 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:19,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:21,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:21,371 INFO L93 Difference]: Finished difference Result 1228 states and 1900 transitions. [2021-12-15 22:00:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:21,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 22:00:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:21,375 INFO L225 Difference]: With dead ends: 1228 [2021-12-15 22:00:21,376 INFO L226 Difference]: Without dead ends: 681 [2021-12-15 22:00:21,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:21,377 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 98 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:21,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 546 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 229 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-12-15 22:00:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-12-15 22:00:21,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 557. [2021-12-15 22:00:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.5593525179856116) internal successors, (867), 556 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 867 transitions. [2021-12-15 22:00:21,392 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 867 transitions. Word has length 108 [2021-12-15 22:00:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:21,393 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 867 transitions. [2021-12-15 22:00:21,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 867 transitions. [2021-12-15 22:00:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 22:00:21,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:21,395 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:21,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:00:21,396 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:21,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1035451495, now seen corresponding path program 1 times [2021-12-15 22:00:21,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:21,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140984460] [2021-12-15 22:00:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:21,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:21,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:21,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140984460] [2021-12-15 22:00:21,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140984460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:21,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:21,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:21,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588780583] [2021-12-15 22:00:21,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:21,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:21,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:21,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:21,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:21,621 INFO L87 Difference]: Start difference. First operand 557 states and 867 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:23,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:25,647 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:25,886 INFO L93 Difference]: Finished difference Result 1034 states and 1593 transitions. [2021-12-15 22:00:25,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:25,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 22:00:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:25,889 INFO L225 Difference]: With dead ends: 1034 [2021-12-15 22:00:25,889 INFO L226 Difference]: Without dead ends: 681 [2021-12-15 22:00:25,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:25,890 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 93 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:25,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 544 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-12-15 22:00:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-12-15 22:00:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 557. [2021-12-15 22:00:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.5557553956834533) internal successors, (865), 556 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 865 transitions. [2021-12-15 22:00:25,900 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 865 transitions. Word has length 108 [2021-12-15 22:00:25,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:25,900 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 865 transitions. [2021-12-15 22:00:25,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 865 transitions. [2021-12-15 22:00:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 22:00:25,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:25,902 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:25,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:00:25,902 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:25,903 INFO L85 PathProgramCache]: Analyzing trace with hash -208438936, now seen corresponding path program 1 times [2021-12-15 22:00:25,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:25,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399589770] [2021-12-15 22:00:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:25,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:26,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399589770] [2021-12-15 22:00:26,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399589770] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:26,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:26,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:26,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668838687] [2021-12-15 22:00:26,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:26,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:26,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:26,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:26,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:26,031 INFO L87 Difference]: Start difference. First operand 557 states and 865 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:28,060 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:28,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:28,289 INFO L93 Difference]: Finished difference Result 1302 states and 1990 transitions. [2021-12-15 22:00:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:28,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 22:00:28,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:28,292 INFO L225 Difference]: With dead ends: 1302 [2021-12-15 22:00:28,292 INFO L226 Difference]: Without dead ends: 755 [2021-12-15 22:00:28,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:28,294 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 120 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:28,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 270 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:00:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-12-15 22:00:28,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 557. [2021-12-15 22:00:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 1.54136690647482) internal successors, (857), 556 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 857 transitions. [2021-12-15 22:00:28,304 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 857 transitions. Word has length 108 [2021-12-15 22:00:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:28,305 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 857 transitions. [2021-12-15 22:00:28,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 857 transitions. [2021-12-15 22:00:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-15 22:00:28,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:28,306 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:28,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:00:28,306 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:28,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1237275429, now seen corresponding path program 1 times [2021-12-15 22:00:28,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:28,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174000016] [2021-12-15 22:00:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:28,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:28,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:28,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174000016] [2021-12-15 22:00:28,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174000016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:28,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:28,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:28,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466316285] [2021-12-15 22:00:28,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:28,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:28,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:28,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:28,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:28,432 INFO L87 Difference]: Start difference. First operand 557 states and 857 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:30,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:30,703 INFO L93 Difference]: Finished difference Result 1183 states and 1798 transitions. [2021-12-15 22:00:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:30,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-15 22:00:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:30,705 INFO L225 Difference]: With dead ends: 1183 [2021-12-15 22:00:30,705 INFO L226 Difference]: Without dead ends: 830 [2021-12-15 22:00:30,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:30,706 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 115 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:30,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 498 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:00:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-12-15 22:00:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 605. [2021-12-15 22:00:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.5298013245033113) internal successors, (924), 604 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:30,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 924 transitions. [2021-12-15 22:00:30,717 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 924 transitions. Word has length 108 [2021-12-15 22:00:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:30,717 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 924 transitions. [2021-12-15 22:00:30,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:30,717 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 924 transitions. [2021-12-15 22:00:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 22:00:30,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:30,719 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:30,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:00:30,719 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:30,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:30,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1404706925, now seen corresponding path program 1 times [2021-12-15 22:00:30,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:30,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400904347] [2021-12-15 22:00:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:30,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:30,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400904347] [2021-12-15 22:00:30,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400904347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:30,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:30,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:30,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61496426] [2021-12-15 22:00:30,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:30,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:30,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:30,844 INFO L87 Difference]: Start difference. First operand 605 states and 924 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:32,346 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:32,623 INFO L93 Difference]: Finished difference Result 1398 states and 2108 transitions. [2021-12-15 22:00:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:32,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 109 [2021-12-15 22:00:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:32,625 INFO L225 Difference]: With dead ends: 1398 [2021-12-15 22:00:32,626 INFO L226 Difference]: Without dead ends: 803 [2021-12-15 22:00:32,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:32,626 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 118 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:32,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 292 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 22:00:32,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-12-15 22:00:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 605. [2021-12-15 22:00:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.5082781456953642) internal successors, (911), 604 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:32,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 911 transitions. [2021-12-15 22:00:32,658 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 911 transitions. Word has length 109 [2021-12-15 22:00:32,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:32,659 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 911 transitions. [2021-12-15 22:00:32,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 911 transitions. [2021-12-15 22:00:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 22:00:32,660 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:32,660 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:32,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:00:32,660 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:32,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:32,661 INFO L85 PathProgramCache]: Analyzing trace with hash 723433488, now seen corresponding path program 1 times [2021-12-15 22:00:32,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:32,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491950343] [2021-12-15 22:00:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:32,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:32,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:32,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491950343] [2021-12-15 22:00:32,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491950343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:32,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:32,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:32,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800076788] [2021-12-15 22:00:32,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:32,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:32,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:32,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:32,779 INFO L87 Difference]: Start difference. First operand 605 states and 911 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:34,795 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:35,034 INFO L93 Difference]: Finished difference Result 1207 states and 1805 transitions. [2021-12-15 22:00:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:35,034 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 109 [2021-12-15 22:00:35,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:35,036 INFO L225 Difference]: With dead ends: 1207 [2021-12-15 22:00:35,036 INFO L226 Difference]: Without dead ends: 822 [2021-12-15 22:00:35,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:35,037 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 110 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:35,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 496 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:00:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-12-15 22:00:35,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 608. [2021-12-15 22:00:35,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 1.4942339373970346) internal successors, (907), 607 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:35,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 907 transitions. [2021-12-15 22:00:35,084 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 907 transitions. Word has length 109 [2021-12-15 22:00:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:35,084 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 907 transitions. [2021-12-15 22:00:35,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:35,085 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 907 transitions. [2021-12-15 22:00:35,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 22:00:35,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:35,086 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:35,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:00:35,086 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:35,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2023275345, now seen corresponding path program 1 times [2021-12-15 22:00:35,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:35,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566804392] [2021-12-15 22:00:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:35,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:35,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566804392] [2021-12-15 22:00:35,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566804392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:35,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:35,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:35,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314147010] [2021-12-15 22:00:35,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:35,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:35,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:35,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:35,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:35,220 INFO L87 Difference]: Start difference. First operand 608 states and 907 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:37,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:37,484 INFO L93 Difference]: Finished difference Result 1485 states and 2194 transitions. [2021-12-15 22:00:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:37,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 109 [2021-12-15 22:00:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:37,487 INFO L225 Difference]: With dead ends: 1485 [2021-12-15 22:00:37,487 INFO L226 Difference]: Without dead ends: 887 [2021-12-15 22:00:37,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:37,488 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 94 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:37,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 276 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:00:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-12-15 22:00:37,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 722. [2021-12-15 22:00:37,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.5117891816920943) internal successors, (1090), 721 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 1090 transitions. [2021-12-15 22:00:37,532 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 1090 transitions. Word has length 109 [2021-12-15 22:00:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:37,532 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 1090 transitions. [2021-12-15 22:00:37,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 1090 transitions. [2021-12-15 22:00:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-15 22:00:37,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:37,534 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:37,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:00:37,534 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:37,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2139131827, now seen corresponding path program 1 times [2021-12-15 22:00:37,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:37,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498051472] [2021-12-15 22:00:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:37,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:37,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:37,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498051472] [2021-12-15 22:00:37,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498051472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:37,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:37,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:37,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785925205] [2021-12-15 22:00:37,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:37,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:37,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:37,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:37,673 INFO L87 Difference]: Start difference. First operand 722 states and 1090 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:39,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:39,963 INFO L93 Difference]: Finished difference Result 1632 states and 2440 transitions. [2021-12-15 22:00:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:39,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 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 109 [2021-12-15 22:00:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:39,966 INFO L225 Difference]: With dead ends: 1632 [2021-12-15 22:00:39,966 INFO L226 Difference]: Without dead ends: 920 [2021-12-15 22:00:39,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:39,968 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 92 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:39,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 270 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:00:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-12-15 22:00:40,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 761. [2021-12-15 22:00:40,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 1.5328947368421053) internal successors, (1165), 760 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1165 transitions. [2021-12-15 22:00:40,022 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1165 transitions. Word has length 109 [2021-12-15 22:00:40,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:40,022 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1165 transitions. [2021-12-15 22:00:40,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1165 transitions. [2021-12-15 22:00:40,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 22:00:40,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:40,024 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:40,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 22:00:40,024 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:40,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:40,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1678148517, now seen corresponding path program 1 times [2021-12-15 22:00:40,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:40,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883940274] [2021-12-15 22:00:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:40,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:40,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:40,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883940274] [2021-12-15 22:00:40,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883940274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:40,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:40,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:40,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253865095] [2021-12-15 22:00:40,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:40,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:40,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:40,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:40,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:40,200 INFO L87 Difference]: Start difference. First operand 761 states and 1165 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:42,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:42,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:42,434 INFO L93 Difference]: Finished difference Result 1671 states and 2512 transitions. [2021-12-15 22:00:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:42,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-15 22:00:42,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:42,437 INFO L225 Difference]: With dead ends: 1671 [2021-12-15 22:00:42,437 INFO L226 Difference]: Without dead ends: 920 [2021-12-15 22:00:42,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:42,438 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 115 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:42,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 274 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:00:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-12-15 22:00:42,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 761. [2021-12-15 22:00:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 1.5118421052631579) internal successors, (1149), 760 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1149 transitions. [2021-12-15 22:00:42,470 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1149 transitions. Word has length 110 [2021-12-15 22:00:42,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:42,470 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1149 transitions. [2021-12-15 22:00:42,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:42,470 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1149 transitions. [2021-12-15 22:00:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 22:00:42,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:42,472 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:42,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 22:00:42,472 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1072258150, now seen corresponding path program 1 times [2021-12-15 22:00:42,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:42,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744315949] [2021-12-15 22:00:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:42,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:42,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:42,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744315949] [2021-12-15 22:00:42,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744315949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:42,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:42,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:42,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16179212] [2021-12-15 22:00:42,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:42,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:42,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:42,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:42,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:42,592 INFO L87 Difference]: Start difference. First operand 761 states and 1149 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:44,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:44,890 INFO L93 Difference]: Finished difference Result 1671 states and 2480 transitions. [2021-12-15 22:00:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:44,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 110 [2021-12-15 22:00:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:44,893 INFO L225 Difference]: With dead ends: 1671 [2021-12-15 22:00:44,893 INFO L226 Difference]: Without dead ends: 920 [2021-12-15 22:00:44,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:44,894 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 91 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:44,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 274 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:00:44,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-12-15 22:00:44,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 761. [2021-12-15 22:00:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 1.5078947368421052) internal successors, (1146), 760 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:44,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1146 transitions. [2021-12-15 22:00:44,907 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1146 transitions. Word has length 110 [2021-12-15 22:00:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:44,908 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1146 transitions. [2021-12-15 22:00:44,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1146 transitions. [2021-12-15 22:00:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-15 22:00:44,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:44,909 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:44,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 22:00:44,910 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:44,910 INFO L85 PathProgramCache]: Analyzing trace with hash 195821732, now seen corresponding path program 1 times [2021-12-15 22:00:44,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:44,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723349665] [2021-12-15 22:00:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:44,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-15 22:00:45,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:45,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723349665] [2021-12-15 22:00:45,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723349665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:45,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:45,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:45,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071890267] [2021-12-15 22:00:45,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:45,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:45,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:45,035 INFO L87 Difference]: Start difference. First operand 761 states and 1146 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:47,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:49,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:00:49,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:00:49,299 INFO L93 Difference]: Finished difference Result 1622 states and 2433 transitions. [2021-12-15 22:00:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:00:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 110 [2021-12-15 22:00:49,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:00:49,302 INFO L225 Difference]: With dead ends: 1622 [2021-12-15 22:00:49,302 INFO L226 Difference]: Without dead ends: 871 [2021-12-15 22:00:49,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:00:49,303 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 59 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:00:49,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 522 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 217 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-12-15 22:00:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-12-15 22:00:49,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 793. [2021-12-15 22:00:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 1.5126262626262625) internal successors, (1198), 792 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1198 transitions. [2021-12-15 22:00:49,320 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1198 transitions. Word has length 110 [2021-12-15 22:00:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:00:49,320 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1198 transitions. [2021-12-15 22:00:49,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1198 transitions. [2021-12-15 22:00:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 22:00:49,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:00:49,323 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:00:49,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 22:00:49,323 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:00:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:00:49,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1986697810, now seen corresponding path program 1 times [2021-12-15 22:00:49,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:00:49,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643679290] [2021-12-15 22:00:49,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:00:49,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:00:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:00:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-15 22:00:49,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:00:49,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643679290] [2021-12-15 22:00:49,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643679290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:00:49,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:00:49,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:00:49,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642107099] [2021-12-15 22:00:49,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:00:49,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:00:49,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:00:49,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:00:49,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:00:49,474 INFO L87 Difference]: Start difference. First operand 793 states and 1198 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:00:51,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []