./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_srvr.blast.16.i.cil-2.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 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:42:19,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:42:19,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:42:19,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:42:19,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:42:19,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:42:19,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:42:19,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:42:19,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:42:19,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:42:19,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:42:19,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:42:19,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:42:19,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:42:19,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:42:19,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:42:19,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:42:19,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:42:19,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:42:19,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:42:19,220 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:42:19,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:42:19,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:42:19,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:42:19,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:42:19,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:42:19,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:42:19,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:42:19,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:42:19,231 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:42:19,232 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:42:19,232 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:42:19,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:42:19,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:42:19,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:42:19,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:42:19,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:42:19,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:42:19,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:42:19,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:42:19,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:42:19,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:42:19,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:42:19,273 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:42:19,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:42:19,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:42:19,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:42:19,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:42:19,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:42:19,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:42:19,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:42:19,275 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:42:19,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:42:19,276 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:42:19,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:42:19,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:42:19,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:42:19,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:42:19,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:42:19,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:42:19,278 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:42:19,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:42:19,278 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:42:19,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:42:19,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:42:19,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:42:19,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:42:19,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:42:19,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:42:19,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:42:19,280 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:42:19,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:42:19,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:42:19,280 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:42:19,281 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:42:19,281 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:42:19,281 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b77735b82f790dcf6393a6fb65098490b7c65f26539a1354e286eeb25926e8 [2022-07-20 22:42:19,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:42:19,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:42:19,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:42:19,587 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:42:19,588 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:42:19,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2022-07-20 22:42:19,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7cdafd67/99a3bd1ba75c4ee8add05554e9498572/FLAG415142360 [2022-07-20 22:42:20,196 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:42:20,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-2.c [2022-07-20 22:42:20,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7cdafd67/99a3bd1ba75c4ee8add05554e9498572/FLAG415142360 [2022-07-20 22:42:20,469 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7cdafd67/99a3bd1ba75c4ee8add05554e9498572 [2022-07-20 22:42:20,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:42:20,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:42:20,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:42:20,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:42:20,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:42:20,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:42:20" (1/1) ... [2022-07-20 22:42:20,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217e99f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:20, skipping insertion in model container [2022-07-20 22:42:20,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:42:20" (1/1) ... [2022-07-20 22:42:20,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:42:20,534 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:42:20,869 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_srvr.blast.16.i.cil-2.c[77660,77673] [2022-07-20 22:42:20,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:42:20,895 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:42:20,987 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_srvr.blast.16.i.cil-2.c[77660,77673] [2022-07-20 22:42:20,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:42:21,003 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:42:21,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21 WrapperNode [2022-07-20 22:42:21,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:42:21,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:42:21,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:42:21,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:42:21,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21" (1/1) ... [2022-07-20 22:42:21,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21" (1/1) ... [2022-07-20 22:42:21,084 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 810 [2022-07-20 22:42:21,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:42:21,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:42:21,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:42:21,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:42:21,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21" (1/1) ... [2022-07-20 22:42:21,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21" (1/1) ... [2022-07-20 22:42:21,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21" (1/1) ... [2022-07-20 22:42:21,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21" (1/1) ... [2022-07-20 22:42:21,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21" (1/1) ... [2022-07-20 22:42:21,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21" (1/1) ... [2022-07-20 22:42:21,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21" (1/1) ... [2022-07-20 22:42:21,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:42:21,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:42:21,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:42:21,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:42:21,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21" (1/1) ... [2022-07-20 22:42:21,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:42:21,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:42:21,204 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) [2022-07-20 22:42:21,231 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 [2022-07-20 22:42:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:42:21,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 22:42:21,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:42:21,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:42:21,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 22:42:21,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:42:21,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 22:42:21,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:42:21,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:42:21,433 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:42:21,434 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:42:21,459 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:42:23,662 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-20 22:42:23,663 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-20 22:42:23,663 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:42:23,672 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:42:23,672 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 22:42:23,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:42:23 BoogieIcfgContainer [2022-07-20 22:42:23,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:42:23,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:42:23,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:42:23,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:42:23,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:42:20" (1/3) ... [2022-07-20 22:42:23,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159843e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:42:23, skipping insertion in model container [2022-07-20 22:42:23,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:42:21" (2/3) ... [2022-07-20 22:42:23,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159843e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:42:23, skipping insertion in model container [2022-07-20 22:42:23,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:42:23" (3/3) ... [2022-07-20 22:42:23,683 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-2.c [2022-07-20 22:42:23,694 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:42:23,695 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:42:23,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:42:23,761 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@19e4a886, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4023a02e [2022-07-20 22:42:23,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:42:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 157 states have (on average 1.732484076433121) internal successors, (272), 158 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 22:42:23,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:23,775 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:23,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:23,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:23,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2069453347, now seen corresponding path program 1 times [2022-07-20 22:42:23,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:23,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849690511] [2022-07-20 22:42:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:23,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:24,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:24,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849690511] [2022-07-20 22:42:24,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849690511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:24,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:24,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:24,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048035093] [2022-07-20 22:42:24,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:24,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:24,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:24,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:24,386 INFO L87 Difference]: Start difference. First operand has 159 states, 157 states have (on average 1.732484076433121) internal successors, (272), 158 states have internal predecessors, (272), 0 states have call successors, (0), 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 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:25,277 INFO L93 Difference]: Finished difference Result 447 states and 768 transitions. [2022-07-20 22:42:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:25,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-20 22:42:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:25,295 INFO L225 Difference]: With dead ends: 447 [2022-07-20 22:42:25,298 INFO L226 Difference]: Without dead ends: 273 [2022-07-20 22:42:25,302 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:25,306 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 172 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:25,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 495 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:42:25,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-07-20 22:42:25,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 186. [2022-07-20 22:42:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.627027027027027) internal successors, (301), 185 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 301 transitions. [2022-07-20 22:42:25,381 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 301 transitions. Word has length 46 [2022-07-20 22:42:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:25,382 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 301 transitions. [2022-07-20 22:42:25,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 301 transitions. [2022-07-20 22:42:25,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-20 22:42:25,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:25,389 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:25,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:42:25,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash 413309822, now seen corresponding path program 1 times [2022-07-20 22:42:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:25,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755331231] [2022-07-20 22:42:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:25,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:25,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755331231] [2022-07-20 22:42:25,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755331231] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:25,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:25,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:25,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369441447] [2022-07-20 22:42:25,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:25,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:25,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:25,599 INFO L87 Difference]: Start difference. First operand 186 states and 301 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:26,316 INFO L93 Difference]: Finished difference Result 390 states and 629 transitions. [2022-07-20 22:42:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:26,316 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-07-20 22:42:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:26,318 INFO L225 Difference]: With dead ends: 390 [2022-07-20 22:42:26,318 INFO L226 Difference]: Without dead ends: 214 [2022-07-20 22:42:26,319 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:26,320 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 22 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:26,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 523 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:42:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-20 22:42:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 197. [2022-07-20 22:42:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.6326530612244898) internal successors, (320), 196 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 320 transitions. [2022-07-20 22:42:26,332 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 320 transitions. Word has length 47 [2022-07-20 22:42:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:26,333 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 320 transitions. [2022-07-20 22:42:26,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 320 transitions. [2022-07-20 22:42:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 22:42:26,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:26,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2022-07-20 22:42:26,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:42:26,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1553389893, now seen corresponding path program 1 times [2022-07-20 22:42:26,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:26,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650087794] [2022-07-20 22:42:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:26,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:26,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:26,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650087794] [2022-07-20 22:42:26,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650087794] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:26,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:26,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:26,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428184029] [2022-07-20 22:42:26,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:26,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:26,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:26,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:26,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:26,488 INFO L87 Difference]: Start difference. First operand 197 states and 320 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:27,122 INFO L93 Difference]: Finished difference Result 538 states and 879 transitions. [2022-07-20 22:42:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:27,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2022-07-20 22:42:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:27,125 INFO L225 Difference]: With dead ends: 538 [2022-07-20 22:42:27,125 INFO L226 Difference]: Without dead ends: 362 [2022-07-20 22:42:27,126 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:27,126 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 161 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:27,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 704 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-07-20 22:42:27,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 229. [2022-07-20 22:42:27,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6271929824561404) internal successors, (371), 228 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:27,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 371 transitions. [2022-07-20 22:42:27,140 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 371 transitions. Word has length 60 [2022-07-20 22:42:27,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:27,140 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 371 transitions. [2022-07-20 22:42:27,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:27,140 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 371 transitions. [2022-07-20 22:42:27,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 22:42:27,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:27,142 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:27,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:42:27,142 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:27,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:27,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1967864692, now seen corresponding path program 1 times [2022-07-20 22:42:27,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:27,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154858391] [2022-07-20 22:42:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:27,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:27,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154858391] [2022-07-20 22:42:27,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154858391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:27,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:27,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:27,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930209932] [2022-07-20 22:42:27,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:27,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:27,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:27,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:27,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:27,288 INFO L87 Difference]: Start difference. First operand 229 states and 371 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) [2022-07-20 22:42:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:28,210 INFO L93 Difference]: Finished difference Result 546 states and 882 transitions. [2022-07-20 22:42:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:28,211 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 61 [2022-07-20 22:42:28,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:28,212 INFO L225 Difference]: With dead ends: 546 [2022-07-20 22:42:28,212 INFO L226 Difference]: Without dead ends: 338 [2022-07-20 22:42:28,213 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:28,214 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 166 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:28,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:42:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-20 22:42:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 229. [2022-07-20 22:42:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6096491228070176) internal successors, (367), 228 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 367 transitions. [2022-07-20 22:42:28,226 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 367 transitions. Word has length 61 [2022-07-20 22:42:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:28,226 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 367 transitions. [2022-07-20 22:42:28,226 INFO L496 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) [2022-07-20 22:42:28,226 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 367 transitions. [2022-07-20 22:42:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 22:42:28,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:28,228 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-07-20 22:42:28,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:42:28,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:28,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1129853920, now seen corresponding path program 1 times [2022-07-20 22:42:28,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:28,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789565731] [2022-07-20 22:42:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:28,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:28,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:28,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789565731] [2022-07-20 22:42:28,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789565731] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:28,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:28,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:28,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208385522] [2022-07-20 22:42:28,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:28,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:28,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:28,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:28,399 INFO L87 Difference]: Start difference. First operand 229 states and 367 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) [2022-07-20 22:42:29,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:29,041 INFO L93 Difference]: Finished difference Result 453 states and 723 transitions. [2022-07-20 22:42:29,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:29,041 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 61 [2022-07-20 22:42:29,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:29,042 INFO L225 Difference]: With dead ends: 453 [2022-07-20 22:42:29,042 INFO L226 Difference]: Without dead ends: 245 [2022-07-20 22:42:29,043 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:29,044 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 26 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:29,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 527 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-20 22:42:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2022-07-20 22:42:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.605263157894737) internal successors, (366), 228 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:29,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 366 transitions. [2022-07-20 22:42:29,059 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 366 transitions. Word has length 61 [2022-07-20 22:42:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:29,059 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 366 transitions. [2022-07-20 22:42:29,059 INFO L496 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) [2022-07-20 22:42:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 366 transitions. [2022-07-20 22:42:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 22:42:29,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:29,060 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:29,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 22:42:29,061 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:29,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:29,061 INFO L85 PathProgramCache]: Analyzing trace with hash 324676919, now seen corresponding path program 1 times [2022-07-20 22:42:29,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:29,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37365699] [2022-07-20 22:42:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:29,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:29,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:29,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37365699] [2022-07-20 22:42:29,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37365699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:29,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:29,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848438842] [2022-07-20 22:42:29,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:29,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:29,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:29,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:29,203 INFO L87 Difference]: Start difference. First operand 229 states and 366 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) [2022-07-20 22:42:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:29,757 INFO L93 Difference]: Finished difference Result 452 states and 721 transitions. [2022-07-20 22:42:29,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:29,758 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 61 [2022-07-20 22:42:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:29,759 INFO L225 Difference]: With dead ends: 452 [2022-07-20 22:42:29,759 INFO L226 Difference]: Without dead ends: 244 [2022-07-20 22:42:29,760 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:29,761 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 19 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:29,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 529 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-20 22:42:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 229. [2022-07-20 22:42:29,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6008771929824561) internal successors, (365), 228 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:29,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 365 transitions. [2022-07-20 22:42:29,767 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 365 transitions. Word has length 61 [2022-07-20 22:42:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:29,768 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 365 transitions. [2022-07-20 22:42:29,768 INFO L496 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) [2022-07-20 22:42:29,768 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 365 transitions. [2022-07-20 22:42:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 22:42:29,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:29,769 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:29,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:42:29,769 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:29,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:29,770 INFO L85 PathProgramCache]: Analyzing trace with hash -624671241, now seen corresponding path program 1 times [2022-07-20 22:42:29,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:29,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305546892] [2022-07-20 22:42:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:29,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:29,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:29,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305546892] [2022-07-20 22:42:29,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305546892] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:29,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:29,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:29,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991831823] [2022-07-20 22:42:29,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:29,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:29,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:29,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:29,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:29,862 INFO L87 Difference]: Start difference. First operand 229 states and 365 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) [2022-07-20 22:42:30,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:30,472 INFO L93 Difference]: Finished difference Result 546 states and 873 transitions. [2022-07-20 22:42:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:30,472 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 61 [2022-07-20 22:42:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:30,474 INFO L225 Difference]: With dead ends: 546 [2022-07-20 22:42:30,474 INFO L226 Difference]: Without dead ends: 338 [2022-07-20 22:42:30,474 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:30,475 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 159 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:30,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-20 22:42:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 230. [2022-07-20 22:42:30,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5895196506550218) internal successors, (364), 229 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 364 transitions. [2022-07-20 22:42:30,482 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 364 transitions. Word has length 61 [2022-07-20 22:42:30,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:30,483 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 364 transitions. [2022-07-20 22:42:30,483 INFO L496 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) [2022-07-20 22:42:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 364 transitions. [2022-07-20 22:42:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-20 22:42:30,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:30,484 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-20 22:42:30,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:42:30,484 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:30,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1608456996, now seen corresponding path program 1 times [2022-07-20 22:42:30,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:30,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346004437] [2022-07-20 22:42:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:30,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:30,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:30,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346004437] [2022-07-20 22:42:30,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346004437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:30,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:30,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:30,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785370781] [2022-07-20 22:42:30,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:30,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:30,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:30,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:30,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:30,565 INFO L87 Difference]: Start difference. First operand 230 states and 364 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:31,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:31,575 INFO L93 Difference]: Finished difference Result 452 states and 717 transitions. [2022-07-20 22:42:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:31,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2022-07-20 22:42:31,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:31,577 INFO L225 Difference]: With dead ends: 452 [2022-07-20 22:42:31,577 INFO L226 Difference]: Without dead ends: 243 [2022-07-20 22:42:31,577 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:31,578 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 22 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:31,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 533 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 22:42:31,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-20 22:42:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2022-07-20 22:42:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5851528384279476) internal successors, (363), 229 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 363 transitions. [2022-07-20 22:42:31,585 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 363 transitions. Word has length 62 [2022-07-20 22:42:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:31,585 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 363 transitions. [2022-07-20 22:42:31,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:31,585 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 363 transitions. [2022-07-20 22:42:31,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-20 22:42:31,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:31,586 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-07-20 22:42:31,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 22:42:31,587 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:31,587 INFO L85 PathProgramCache]: Analyzing trace with hash 557952677, now seen corresponding path program 1 times [2022-07-20 22:42:31,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:31,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433266500] [2022-07-20 22:42:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:31,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:31,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:31,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433266500] [2022-07-20 22:42:31,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433266500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:31,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:31,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:31,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148927571] [2022-07-20 22:42:31,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:31,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:31,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:31,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:31,687 INFO L87 Difference]: Start difference. First operand 230 states and 363 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:32,282 INFO L93 Difference]: Finished difference Result 452 states and 716 transitions. [2022-07-20 22:42:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:32,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2022-07-20 22:42:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:32,284 INFO L225 Difference]: With dead ends: 452 [2022-07-20 22:42:32,284 INFO L226 Difference]: Without dead ends: 243 [2022-07-20 22:42:32,284 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:32,285 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 20 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:32,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 533 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-20 22:42:32,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2022-07-20 22:42:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5807860262008733) internal successors, (362), 229 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:32,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 362 transitions. [2022-07-20 22:42:32,291 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 362 transitions. Word has length 63 [2022-07-20 22:42:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:32,291 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 362 transitions. [2022-07-20 22:42:32,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:32,292 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 362 transitions. [2022-07-20 22:42:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 22:42:32,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:32,293 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2022-07-20 22:42:32,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 22:42:32,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:32,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1981706935, now seen corresponding path program 1 times [2022-07-20 22:42:32,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:32,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102764256] [2022-07-20 22:42:32,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:32,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:32,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:32,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102764256] [2022-07-20 22:42:32,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102764256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:32,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:32,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:32,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317926815] [2022-07-20 22:42:32,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:32,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:32,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:32,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:32,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:32,387 INFO L87 Difference]: Start difference. First operand 230 states and 362 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:33,537 INFO L93 Difference]: Finished difference Result 442 states and 702 transitions. [2022-07-20 22:42:33,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:33,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-20 22:42:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:33,538 INFO L225 Difference]: With dead ends: 442 [2022-07-20 22:42:33,538 INFO L226 Difference]: Without dead ends: 233 [2022-07-20 22:42:33,539 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:33,539 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 11 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:33,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 547 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 22:42:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-20 22:42:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2022-07-20 22:42:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5764192139737991) internal successors, (361), 229 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 361 transitions. [2022-07-20 22:42:33,546 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 361 transitions. Word has length 64 [2022-07-20 22:42:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:33,546 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 361 transitions. [2022-07-20 22:42:33,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 361 transitions. [2022-07-20 22:42:33,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 22:42:33,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:33,547 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:33,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 22:42:33,548 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:33,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1581555535, now seen corresponding path program 1 times [2022-07-20 22:42:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:33,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214904023] [2022-07-20 22:42:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:33,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:33,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:33,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214904023] [2022-07-20 22:42:33,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214904023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:33,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:33,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:33,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080049387] [2022-07-20 22:42:33,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:33,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:33,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:33,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:33,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:33,636 INFO L87 Difference]: Start difference. First operand 230 states and 361 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:34,496 INFO L93 Difference]: Finished difference Result 479 states and 757 transitions. [2022-07-20 22:42:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:34,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-20 22:42:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:34,499 INFO L225 Difference]: With dead ends: 479 [2022-07-20 22:42:34,499 INFO L226 Difference]: Without dead ends: 270 [2022-07-20 22:42:34,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:42:34,500 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 31 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:34,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 551 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:42:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-20 22:42:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 252. [2022-07-20 22:42:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5776892430278884) internal successors, (396), 251 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 396 transitions. [2022-07-20 22:42:34,507 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 396 transitions. Word has length 64 [2022-07-20 22:42:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:34,507 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 396 transitions. [2022-07-20 22:42:34,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 396 transitions. [2022-07-20 22:42:34,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-20 22:42:34,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:34,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:34,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 22:42:34,509 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:34,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:34,509 INFO L85 PathProgramCache]: Analyzing trace with hash 993655827, now seen corresponding path program 1 times [2022-07-20 22:42:34,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:34,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856480479] [2022-07-20 22:42:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:34,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:34,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:34,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856480479] [2022-07-20 22:42:34,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856480479] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:34,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:34,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:34,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302543326] [2022-07-20 22:42:34,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:34,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:34,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:34,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:34,593 INFO L87 Difference]: Start difference. First operand 252 states and 396 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:35,354 INFO L93 Difference]: Finished difference Result 591 states and 937 transitions. [2022-07-20 22:42:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:35,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2022-07-20 22:42:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:35,357 INFO L225 Difference]: With dead ends: 591 [2022-07-20 22:42:35,357 INFO L226 Difference]: Without dead ends: 360 [2022-07-20 22:42:35,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:42:35,358 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 164 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:35,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:42:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-20 22:42:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 252. [2022-07-20 22:42:35,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5617529880478087) internal successors, (392), 251 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 392 transitions. [2022-07-20 22:42:35,365 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 392 transitions. Word has length 78 [2022-07-20 22:42:35,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:35,365 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 392 transitions. [2022-07-20 22:42:35,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:35,365 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 392 transitions. [2022-07-20 22:42:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-20 22:42:35,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:35,366 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:35,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 22:42:35,366 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:35,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1846780630, now seen corresponding path program 1 times [2022-07-20 22:42:35,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:35,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892092258] [2022-07-20 22:42:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:35,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:35,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:35,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892092258] [2022-07-20 22:42:35,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892092258] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:35,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:35,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:35,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628892268] [2022-07-20 22:42:35,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:35,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:35,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:35,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:35,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:35,477 INFO L87 Difference]: Start difference. First operand 252 states and 392 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:35,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:35,982 INFO L93 Difference]: Finished difference Result 500 states and 782 transitions. [2022-07-20 22:42:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:35,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2022-07-20 22:42:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:35,984 INFO L225 Difference]: With dead ends: 500 [2022-07-20 22:42:35,984 INFO L226 Difference]: Without dead ends: 269 [2022-07-20 22:42:35,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:42:35,985 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 33 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:35,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 553 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-07-20 22:42:35,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 252. [2022-07-20 22:42:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5577689243027888) internal successors, (391), 251 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:35,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 391 transitions. [2022-07-20 22:42:35,992 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 391 transitions. Word has length 78 [2022-07-20 22:42:35,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:35,992 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 391 transitions. [2022-07-20 22:42:35,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:35,993 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 391 transitions. [2022-07-20 22:42:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-20 22:42:35,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:35,993 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:35,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:42:35,994 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:35,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:35,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1282217583, now seen corresponding path program 1 times [2022-07-20 22:42:35,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:35,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146476430] [2022-07-20 22:42:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:35,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:36,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:36,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146476430] [2022-07-20 22:42:36,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146476430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:36,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:36,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:36,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271124682] [2022-07-20 22:42:36,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:36,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:36,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:36,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:36,117 INFO L87 Difference]: Start difference. First operand 252 states and 391 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:37,204 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:37,548 INFO L93 Difference]: Finished difference Result 591 states and 927 transitions. [2022-07-20 22:42:37,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:37,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-20 22:42:37,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:37,550 INFO L225 Difference]: With dead ends: 591 [2022-07-20 22:42:37,550 INFO L226 Difference]: Without dead ends: 360 [2022-07-20 22:42:37,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:42:37,551 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 162 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:37,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 22:42:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-20 22:42:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 252. [2022-07-20 22:42:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5418326693227091) internal successors, (387), 251 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 387 transitions. [2022-07-20 22:42:37,557 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 387 transitions. Word has length 79 [2022-07-20 22:42:37,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:37,558 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 387 transitions. [2022-07-20 22:42:37,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 387 transitions. [2022-07-20 22:42:37,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-20 22:42:37,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:37,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:37,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 22:42:37,560 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:37,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1141353944, now seen corresponding path program 1 times [2022-07-20 22:42:37,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:37,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120720456] [2022-07-20 22:42:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:37,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:37,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120720456] [2022-07-20 22:42:37,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120720456] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:37,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:37,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:37,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773644051] [2022-07-20 22:42:37,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:37,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:37,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:37,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:37,672 INFO L87 Difference]: Start difference. First operand 252 states and 387 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) [2022-07-20 22:42:38,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:38,953 INFO L93 Difference]: Finished difference Result 591 states and 919 transitions. [2022-07-20 22:42:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:38,954 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 80 [2022-07-20 22:42:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:38,955 INFO L225 Difference]: With dead ends: 591 [2022-07-20 22:42:38,955 INFO L226 Difference]: Without dead ends: 360 [2022-07-20 22:42:38,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:42:38,956 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 160 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:38,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 388 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 22:42:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-20 22:42:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 252. [2022-07-20 22:42:38,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5258964143426295) internal successors, (383), 251 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 383 transitions. [2022-07-20 22:42:38,963 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 383 transitions. Word has length 80 [2022-07-20 22:42:38,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:38,963 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 383 transitions. [2022-07-20 22:42:38,963 INFO L496 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) [2022-07-20 22:42:38,963 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 383 transitions. [2022-07-20 22:42:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-20 22:42:38,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:38,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:38,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 22:42:38,964 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:38,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:38,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1076136842, now seen corresponding path program 1 times [2022-07-20 22:42:38,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:38,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505070125] [2022-07-20 22:42:38,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:38,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:42:39,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:39,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505070125] [2022-07-20 22:42:39,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505070125] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:39,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:39,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:39,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467753657] [2022-07-20 22:42:39,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:39,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:39,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:39,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:39,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:39,076 INFO L87 Difference]: Start difference. First operand 252 states and 383 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) [2022-07-20 22:42:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:39,777 INFO L93 Difference]: Finished difference Result 581 states and 898 transitions. [2022-07-20 22:42:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:39,777 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 81 [2022-07-20 22:42:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:39,779 INFO L225 Difference]: With dead ends: 581 [2022-07-20 22:42:39,779 INFO L226 Difference]: Without dead ends: 350 [2022-07-20 22:42:39,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:42:39,780 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 151 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:39,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 408 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:42:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-20 22:42:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 252. [2022-07-20 22:42:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5099601593625498) internal successors, (379), 251 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 379 transitions. [2022-07-20 22:42:39,786 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 379 transitions. Word has length 81 [2022-07-20 22:42:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:39,786 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 379 transitions. [2022-07-20 22:42:39,786 INFO L496 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) [2022-07-20 22:42:39,786 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 379 transitions. [2022-07-20 22:42:39,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-20 22:42:39,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:39,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 22:42:39,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 22:42:39,788 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:39,789 INFO L85 PathProgramCache]: Analyzing trace with hash -226348903, now seen corresponding path program 1 times [2022-07-20 22:42:39,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:39,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957244153] [2022-07-20 22:42:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:39,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:39,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:39,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957244153] [2022-07-20 22:42:39,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957244153] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:39,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:39,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:39,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66508856] [2022-07-20 22:42:39,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:39,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:39,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:39,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:39,884 INFO L87 Difference]: Start difference. First operand 252 states and 379 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:40,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:40,678 INFO L93 Difference]: Finished difference Result 581 states and 890 transitions. [2022-07-20 22:42:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:40,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 86 [2022-07-20 22:42:40,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:40,680 INFO L225 Difference]: With dead ends: 581 [2022-07-20 22:42:40,680 INFO L226 Difference]: Without dead ends: 350 [2022-07-20 22:42:40,681 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:40,681 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 125 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:40,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 434 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:42:40,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-20 22:42:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 275. [2022-07-20 22:42:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.5474452554744527) internal successors, (424), 274 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 424 transitions. [2022-07-20 22:42:40,688 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 424 transitions. Word has length 86 [2022-07-20 22:42:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:40,688 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 424 transitions. [2022-07-20 22:42:40,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 424 transitions. [2022-07-20 22:42:40,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-20 22:42:40,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:40,689 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:40,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 22:42:40,689 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash 437102048, now seen corresponding path program 1 times [2022-07-20 22:42:40,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:40,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057662987] [2022-07-20 22:42:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:40,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:40,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:40,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057662987] [2022-07-20 22:42:40,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057662987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:40,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:40,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:40,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149966294] [2022-07-20 22:42:40,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:40,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:40,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:40,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:40,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:40,786 INFO L87 Difference]: Start difference. First operand 275 states and 424 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:41,328 INFO L93 Difference]: Finished difference Result 618 states and 960 transitions. [2022-07-20 22:42:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:41,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-07-20 22:42:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:41,330 INFO L225 Difference]: With dead ends: 618 [2022-07-20 22:42:41,330 INFO L226 Difference]: Without dead ends: 364 [2022-07-20 22:42:41,330 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:41,331 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 88 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:41,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 529 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:41,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-20 22:42:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 309. [2022-07-20 22:42:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.5487012987012987) internal successors, (477), 308 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 477 transitions. [2022-07-20 22:42:41,338 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 477 transitions. Word has length 114 [2022-07-20 22:42:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:41,339 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 477 transitions. [2022-07-20 22:42:41,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 477 transitions. [2022-07-20 22:42:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-20 22:42:41,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:41,348 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:41,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:42:41,348 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:41,349 INFO L85 PathProgramCache]: Analyzing trace with hash -530248606, now seen corresponding path program 1 times [2022-07-20 22:42:41,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:41,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424346297] [2022-07-20 22:42:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:41,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:41,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:41,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424346297] [2022-07-20 22:42:41,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424346297] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:41,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:41,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:41,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741641218] [2022-07-20 22:42:41,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:41,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:41,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:41,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:41,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:41,497 INFO L87 Difference]: Start difference. First operand 309 states and 477 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:42,310 INFO L93 Difference]: Finished difference Result 748 states and 1168 transitions. [2022-07-20 22:42:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:42,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-07-20 22:42:42,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:42,313 INFO L225 Difference]: With dead ends: 748 [2022-07-20 22:42:42,313 INFO L226 Difference]: Without dead ends: 460 [2022-07-20 22:42:42,313 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:42,314 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 131 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:42,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 418 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:42:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-07-20 22:42:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 339. [2022-07-20 22:42:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.5562130177514792) internal successors, (526), 338 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 526 transitions. [2022-07-20 22:42:42,322 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 526 transitions. Word has length 114 [2022-07-20 22:42:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:42,323 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 526 transitions. [2022-07-20 22:42:42,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 526 transitions. [2022-07-20 22:42:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-20 22:42:42,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:42,324 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1] [2022-07-20 22:42:42,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 22:42:42,325 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:42,325 INFO L85 PathProgramCache]: Analyzing trace with hash 766254903, now seen corresponding path program 1 times [2022-07-20 22:42:42,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:42,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237090115] [2022-07-20 22:42:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:42,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:42,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:42,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237090115] [2022-07-20 22:42:42,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237090115] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:42,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:42,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:42,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296902877] [2022-07-20 22:42:42,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:42,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:42,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:42,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:42,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:42,437 INFO L87 Difference]: Start difference. First operand 339 states and 526 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:43,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:43,062 INFO L93 Difference]: Finished difference Result 772 states and 1203 transitions. [2022-07-20 22:42:43,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:43,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 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 120 [2022-07-20 22:42:43,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:43,064 INFO L225 Difference]: With dead ends: 772 [2022-07-20 22:42:43,064 INFO L226 Difference]: Without dead ends: 454 [2022-07-20 22:42:43,064 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:43,065 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 127 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:43,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 406 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:43,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-20 22:42:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 376. [2022-07-20 22:42:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 1.56) internal successors, (585), 375 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 585 transitions. [2022-07-20 22:42:43,074 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 585 transitions. Word has length 120 [2022-07-20 22:42:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:43,074 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 585 transitions. [2022-07-20 22:42:43,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 585 transitions. [2022-07-20 22:42:43,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-20 22:42:43,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:43,076 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1] [2022-07-20 22:42:43,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 22:42:43,076 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:43,077 INFO L85 PathProgramCache]: Analyzing trace with hash 183105856, now seen corresponding path program 1 times [2022-07-20 22:42:43,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:43,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160304281] [2022-07-20 22:42:43,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:43,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:43,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:43,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160304281] [2022-07-20 22:42:43,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160304281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:43,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:43,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:43,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171872257] [2022-07-20 22:42:43,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:43,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:43,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:43,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:43,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:43,216 INFO L87 Difference]: Start difference. First operand 376 states and 585 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:43,818 INFO L93 Difference]: Finished difference Result 817 states and 1276 transitions. [2022-07-20 22:42:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-07-20 22:42:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:43,820 INFO L225 Difference]: With dead ends: 817 [2022-07-20 22:42:43,820 INFO L226 Difference]: Without dead ends: 462 [2022-07-20 22:42:43,821 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:43,821 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 77 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:43,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 531 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-07-20 22:42:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 416. [2022-07-20 22:42:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.5614457831325301) internal successors, (648), 415 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 648 transitions. [2022-07-20 22:42:43,830 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 648 transitions. Word has length 121 [2022-07-20 22:42:43,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:43,830 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 648 transitions. [2022-07-20 22:42:43,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 648 transitions. [2022-07-20 22:42:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-20 22:42:43,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:43,832 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1] [2022-07-20 22:42:43,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 22:42:43,832 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:43,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:43,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1022139518, now seen corresponding path program 1 times [2022-07-20 22:42:43,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:43,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492921536] [2022-07-20 22:42:43,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:43,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 22:42:43,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:43,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492921536] [2022-07-20 22:42:43,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492921536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:43,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:43,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:43,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723828711] [2022-07-20 22:42:43,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:43,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:43,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:43,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:43,926 INFO L87 Difference]: Start difference. First operand 416 states and 648 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) [2022-07-20 22:42:44,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:44,557 INFO L93 Difference]: Finished difference Result 848 states and 1325 transitions. [2022-07-20 22:42:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:44,557 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 121 [2022-07-20 22:42:44,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:44,559 INFO L225 Difference]: With dead ends: 848 [2022-07-20 22:42:44,559 INFO L226 Difference]: Without dead ends: 453 [2022-07-20 22:42:44,560 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:44,560 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 28 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:44,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 631 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:44,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-07-20 22:42:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 440. [2022-07-20 22:42:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.5558086560364466) internal successors, (683), 439 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:44,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 683 transitions. [2022-07-20 22:42:44,569 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 683 transitions. Word has length 121 [2022-07-20 22:42:44,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:44,569 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 683 transitions. [2022-07-20 22:42:44,570 INFO L496 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) [2022-07-20 22:42:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 683 transitions. [2022-07-20 22:42:44,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-20 22:42:44,571 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:44,571 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:44,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 22:42:44,571 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:44,572 INFO L85 PathProgramCache]: Analyzing trace with hash -808576153, now seen corresponding path program 1 times [2022-07-20 22:42:44,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:44,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728962475] [2022-07-20 22:42:44,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:44,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 22:42:44,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:44,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728962475] [2022-07-20 22:42:44,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728962475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:44,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:44,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:44,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637904659] [2022-07-20 22:42:44,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:44,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:44,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:44,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:44,670 INFO L87 Difference]: Start difference. First operand 440 states and 683 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:45,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:42:46,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:46,021 INFO L93 Difference]: Finished difference Result 897 states and 1395 transitions. [2022-07-20 22:42:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:46,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 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 128 [2022-07-20 22:42:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:46,023 INFO L225 Difference]: With dead ends: 897 [2022-07-20 22:42:46,023 INFO L226 Difference]: Without dead ends: 478 [2022-07-20 22:42:46,024 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:46,025 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 61 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:46,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 537 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 22:42:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-07-20 22:42:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 443. [2022-07-20 22:42:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5520361990950227) internal successors, (686), 442 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 686 transitions. [2022-07-20 22:42:46,033 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 686 transitions. Word has length 128 [2022-07-20 22:42:46,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:46,034 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 686 transitions. [2022-07-20 22:42:46,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 686 transitions. [2022-07-20 22:42:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-20 22:42:46,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:46,036 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:46,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-20 22:42:46,036 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:46,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:46,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1942673447, now seen corresponding path program 1 times [2022-07-20 22:42:46,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:46,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922252147] [2022-07-20 22:42:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:46,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:46,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:46,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922252147] [2022-07-20 22:42:46,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922252147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:46,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:46,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:46,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503515352] [2022-07-20 22:42:46,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:46,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:46,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:46,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:46,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:46,134 INFO L87 Difference]: Start difference. First operand 443 states and 686 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:46,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:46,598 INFO L93 Difference]: Finished difference Result 899 states and 1396 transitions. [2022-07-20 22:42:46,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:46,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 135 [2022-07-20 22:42:46,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:46,600 INFO L225 Difference]: With dead ends: 899 [2022-07-20 22:42:46,600 INFO L226 Difference]: Without dead ends: 477 [2022-07-20 22:42:46,601 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:46,602 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 83 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:46,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 539 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:42:46,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-07-20 22:42:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 443. [2022-07-20 22:42:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5497737556561086) internal successors, (685), 442 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 685 transitions. [2022-07-20 22:42:46,611 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 685 transitions. Word has length 135 [2022-07-20 22:42:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:46,611 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 685 transitions. [2022-07-20 22:42:46,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 685 transitions. [2022-07-20 22:42:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-20 22:42:46,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:46,613 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:46,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 22:42:46,614 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:46,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:46,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1914173157, now seen corresponding path program 1 times [2022-07-20 22:42:46,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:46,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941244837] [2022-07-20 22:42:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:46,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:46,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:46,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941244837] [2022-07-20 22:42:46,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941244837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:46,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:46,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:46,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220224215] [2022-07-20 22:42:46,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:46,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:46,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:46,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:46,729 INFO L87 Difference]: Start difference. First operand 443 states and 685 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:47,256 INFO L93 Difference]: Finished difference Result 877 states and 1362 transitions. [2022-07-20 22:42:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:47,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 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 135 [2022-07-20 22:42:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:47,258 INFO L225 Difference]: With dead ends: 877 [2022-07-20 22:42:47,258 INFO L226 Difference]: Without dead ends: 455 [2022-07-20 22:42:47,259 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:47,259 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 33 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:47,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 631 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:47,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-07-20 22:42:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 443. [2022-07-20 22:42:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.5475113122171946) internal successors, (684), 442 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 684 transitions. [2022-07-20 22:42:47,268 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 684 transitions. Word has length 135 [2022-07-20 22:42:47,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:47,269 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 684 transitions. [2022-07-20 22:42:47,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:47,269 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 684 transitions. [2022-07-20 22:42:47,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-20 22:42:47,270 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:47,271 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1] [2022-07-20 22:42:47,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 22:42:47,271 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:47,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1862166372, now seen corresponding path program 1 times [2022-07-20 22:42:47,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:47,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079180674] [2022-07-20 22:42:47,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:47,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:42:47,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:47,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079180674] [2022-07-20 22:42:47,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079180674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:47,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:47,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:47,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947893005] [2022-07-20 22:42:47,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:47,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:47,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:47,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:47,370 INFO L87 Difference]: Start difference. First operand 443 states and 684 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:47,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:47,968 INFO L93 Difference]: Finished difference Result 980 states and 1518 transitions. [2022-07-20 22:42:47,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:47,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 141 [2022-07-20 22:42:47,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:47,971 INFO L225 Difference]: With dead ends: 980 [2022-07-20 22:42:47,971 INFO L226 Difference]: Without dead ends: 558 [2022-07-20 22:42:47,971 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:47,972 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 134 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:47,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 434 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-07-20 22:42:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 473. [2022-07-20 22:42:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5381355932203389) internal successors, (726), 472 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 726 transitions. [2022-07-20 22:42:47,981 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 726 transitions. Word has length 141 [2022-07-20 22:42:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:47,981 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 726 transitions. [2022-07-20 22:42:47,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 726 transitions. [2022-07-20 22:42:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 22:42:47,983 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:47,983 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 22:42:47,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 22:42:47,983 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1844194602, now seen corresponding path program 1 times [2022-07-20 22:42:47,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:47,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906404012] [2022-07-20 22:42:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:47,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:42:48,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:48,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906404012] [2022-07-20 22:42:48,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906404012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:48,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:48,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:48,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66467732] [2022-07-20 22:42:48,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:48,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:48,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:48,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:48,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:48,085 INFO L87 Difference]: Start difference. First operand 473 states and 726 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:48,501 INFO L93 Difference]: Finished difference Result 1000 states and 1538 transitions. [2022-07-20 22:42:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:48,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 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 142 [2022-07-20 22:42:48,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:48,503 INFO L225 Difference]: With dead ends: 1000 [2022-07-20 22:42:48,503 INFO L226 Difference]: Without dead ends: 548 [2022-07-20 22:42:48,504 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:48,504 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 133 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:48,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 406 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:42:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-07-20 22:42:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 473. [2022-07-20 22:42:48,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5254237288135593) internal successors, (720), 472 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:48,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 720 transitions. [2022-07-20 22:42:48,514 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 720 transitions. Word has length 142 [2022-07-20 22:42:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:48,514 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 720 transitions. [2022-07-20 22:42:48,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 720 transitions. [2022-07-20 22:42:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-20 22:42:48,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:48,516 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:48,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-20 22:42:48,516 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:48,517 INFO L85 PathProgramCache]: Analyzing trace with hash 2025405034, now seen corresponding path program 1 times [2022-07-20 22:42:48,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:48,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100818916] [2022-07-20 22:42:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:48,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:42:48,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:48,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100818916] [2022-07-20 22:42:48,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100818916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:48,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:48,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:48,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658855626] [2022-07-20 22:42:48,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:48,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:48,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:48,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:48,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:48,611 INFO L87 Difference]: Start difference. First operand 473 states and 720 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:49,297 INFO L93 Difference]: Finished difference Result 957 states and 1462 transitions. [2022-07-20 22:42:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:49,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 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 143 [2022-07-20 22:42:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:49,299 INFO L225 Difference]: With dead ends: 957 [2022-07-20 22:42:49,299 INFO L226 Difference]: Without dead ends: 505 [2022-07-20 22:42:49,300 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:49,300 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 73 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:49,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 557 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:42:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-07-20 22:42:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 473. [2022-07-20 22:42:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.5233050847457628) internal successors, (719), 472 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 719 transitions. [2022-07-20 22:42:49,323 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 719 transitions. Word has length 143 [2022-07-20 22:42:49,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:49,324 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 719 transitions. [2022-07-20 22:42:49,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 719 transitions. [2022-07-20 22:42:49,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-20 22:42:49,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:49,326 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:49,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 22:42:49,326 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:49,327 INFO L85 PathProgramCache]: Analyzing trace with hash -372065496, now seen corresponding path program 1 times [2022-07-20 22:42:49,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:49,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951841882] [2022-07-20 22:42:49,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:49,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-20 22:42:49,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:49,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951841882] [2022-07-20 22:42:49,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951841882] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:49,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:49,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:49,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453545037] [2022-07-20 22:42:49,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:49,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:49,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:49,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:49,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:49,417 INFO L87 Difference]: Start difference. First operand 473 states and 719 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:49,490 INFO L93 Difference]: Finished difference Result 1374 states and 2105 transitions. [2022-07-20 22:42:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:49,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-07-20 22:42:49,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:49,494 INFO L225 Difference]: With dead ends: 1374 [2022-07-20 22:42:49,494 INFO L226 Difference]: Without dead ends: 922 [2022-07-20 22:42:49,495 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:49,495 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 151 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:49,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 443 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-07-20 22:42:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 922. [2022-07-20 22:42:49,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.511400651465798) internal successors, (1392), 921 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1392 transitions. [2022-07-20 22:42:49,511 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1392 transitions. Word has length 143 [2022-07-20 22:42:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:49,511 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1392 transitions. [2022-07-20 22:42:49,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1392 transitions. [2022-07-20 22:42:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-20 22:42:49,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:49,514 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:49,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-20 22:42:49,514 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:49,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:49,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2056193126, now seen corresponding path program 1 times [2022-07-20 22:42:49,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:49,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214582157] [2022-07-20 22:42:49,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:49,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-07-20 22:42:49,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:49,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214582157] [2022-07-20 22:42:49,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214582157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:49,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:49,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:49,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171650856] [2022-07-20 22:42:49,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:49,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:49,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:49,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:49,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:49,607 INFO L87 Difference]: Start difference. First operand 922 states and 1392 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:49,648 INFO L93 Difference]: Finished difference Result 1850 states and 2796 transitions. [2022-07-20 22:42:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:49,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 143 [2022-07-20 22:42:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:49,652 INFO L225 Difference]: With dead ends: 1850 [2022-07-20 22:42:49,652 INFO L226 Difference]: Without dead ends: 949 [2022-07-20 22:42:49,653 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:49,653 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:49,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 428 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:42:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-07-20 22:42:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 949. [2022-07-20 22:42:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 1.5052742616033756) internal successors, (1427), 948 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1427 transitions. [2022-07-20 22:42:49,670 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1427 transitions. Word has length 143 [2022-07-20 22:42:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:49,671 INFO L495 AbstractCegarLoop]: Abstraction has 949 states and 1427 transitions. [2022-07-20 22:42:49,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1427 transitions. [2022-07-20 22:42:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-20 22:42:49,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:49,673 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:49,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-20 22:42:49,674 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:49,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:49,674 INFO L85 PathProgramCache]: Analyzing trace with hash 5784228, now seen corresponding path program 1 times [2022-07-20 22:42:49,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:49,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546779095] [2022-07-20 22:42:49,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:49,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-07-20 22:42:49,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:49,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546779095] [2022-07-20 22:42:49,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546779095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:49,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:49,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:49,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260805746] [2022-07-20 22:42:49,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:49,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:49,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:49,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:49,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:49,774 INFO L87 Difference]: Start difference. First operand 949 states and 1427 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:49,811 INFO L93 Difference]: Finished difference Result 1879 states and 2832 transitions. [2022-07-20 22:42:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:49,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 143 [2022-07-20 22:42:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:49,815 INFO L225 Difference]: With dead ends: 1879 [2022-07-20 22:42:49,815 INFO L226 Difference]: Without dead ends: 951 [2022-07-20 22:42:49,816 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:49,816 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:49,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 407 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:42:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-07-20 22:42:49,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 951. [2022-07-20 22:42:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 1.5042105263157894) internal successors, (1429), 950 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1429 transitions. [2022-07-20 22:42:49,836 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1429 transitions. Word has length 143 [2022-07-20 22:42:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:49,836 INFO L495 AbstractCegarLoop]: Abstraction has 951 states and 1429 transitions. [2022-07-20 22:42:49,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1429 transitions. [2022-07-20 22:42:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-20 22:42:49,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:49,840 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:49,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-20 22:42:49,840 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:49,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:49,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2075454910, now seen corresponding path program 1 times [2022-07-20 22:42:49,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:49,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338820699] [2022-07-20 22:42:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:49,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 22:42:49,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:49,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338820699] [2022-07-20 22:42:49,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338820699] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:49,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:49,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:49,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356021426] [2022-07-20 22:42:49,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:49,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:49,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:49,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:49,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:49,948 INFO L87 Difference]: Start difference. First operand 951 states and 1429 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:50,047 INFO L93 Difference]: Finished difference Result 2328 states and 3523 transitions. [2022-07-20 22:42:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:50,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 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 145 [2022-07-20 22:42:50,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:50,051 INFO L225 Difference]: With dead ends: 2328 [2022-07-20 22:42:50,052 INFO L226 Difference]: Without dead ends: 1400 [2022-07-20 22:42:50,054 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:50,054 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 156 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:50,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 588 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-07-20 22:42:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2022-07-20 22:42:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 1.5025017869907076) internal successors, (2102), 1399 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:50,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 2102 transitions. [2022-07-20 22:42:50,079 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 2102 transitions. Word has length 145 [2022-07-20 22:42:50,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:50,079 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 2102 transitions. [2022-07-20 22:42:50,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:50,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 2102 transitions. [2022-07-20 22:42:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-07-20 22:42:50,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:50,082 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:50,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-20 22:42:50,083 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:50,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:50,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1084473730, now seen corresponding path program 1 times [2022-07-20 22:42:50,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:50,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396841428] [2022-07-20 22:42:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:50,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-07-20 22:42:50,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:50,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396841428] [2022-07-20 22:42:50,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396841428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:50,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:50,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:50,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878547657] [2022-07-20 22:42:50,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:50,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:50,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:50,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:50,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:50,204 INFO L87 Difference]: Start difference. First operand 1400 states and 2102 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:50,708 INFO L93 Difference]: Finished difference Result 2930 states and 4405 transitions. [2022-07-20 22:42:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:50,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 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 174 [2022-07-20 22:42:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:50,714 INFO L225 Difference]: With dead ends: 2930 [2022-07-20 22:42:50,714 INFO L226 Difference]: Without dead ends: 1553 [2022-07-20 22:42:50,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:42:50,716 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 42 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:50,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 647 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:42:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-07-20 22:42:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1484. [2022-07-20 22:42:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 1.5043830074173972) internal successors, (2231), 1483 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2231 transitions. [2022-07-20 22:42:50,742 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2231 transitions. Word has length 174 [2022-07-20 22:42:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:50,742 INFO L495 AbstractCegarLoop]: Abstraction has 1484 states and 2231 transitions. [2022-07-20 22:42:50,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2231 transitions. [2022-07-20 22:42:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-07-20 22:42:50,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:50,745 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:50,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-20 22:42:50,745 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:50,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1196950761, now seen corresponding path program 1 times [2022-07-20 22:42:50,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:50,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828506477] [2022-07-20 22:42:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:50,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-20 22:42:50,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:50,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828506477] [2022-07-20 22:42:50,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828506477] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:50,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:50,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:50,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215614354] [2022-07-20 22:42:50,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:50,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:50,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:50,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:50,894 INFO L87 Difference]: Start difference. First operand 1484 states and 2231 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:51,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:51,509 INFO L93 Difference]: Finished difference Result 3162 states and 4730 transitions. [2022-07-20 22:42:51,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:51,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 188 [2022-07-20 22:42:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:51,514 INFO L225 Difference]: With dead ends: 3162 [2022-07-20 22:42:51,514 INFO L226 Difference]: Without dead ends: 1701 [2022-07-20 22:42:51,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:42:51,516 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 145 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:51,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 408 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:42:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-07-20 22:42:51,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1484. [2022-07-20 22:42:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 1.4902225219150371) internal successors, (2210), 1483 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 2210 transitions. [2022-07-20 22:42:51,543 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 2210 transitions. Word has length 188 [2022-07-20 22:42:51,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:51,544 INFO L495 AbstractCegarLoop]: Abstraction has 1484 states and 2210 transitions. [2022-07-20 22:42:51,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 2210 transitions. [2022-07-20 22:42:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-20 22:42:51,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:51,554 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:51,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-20 22:42:51,555 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:51,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:51,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1909029588, now seen corresponding path program 1 times [2022-07-20 22:42:51,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:51,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247237511] [2022-07-20 22:42:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:51,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 252 proven. 38 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-20 22:42:51,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:51,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247237511] [2022-07-20 22:42:51,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247237511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:42:51,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096671923] [2022-07-20 22:42:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:51,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:42:51,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:42:51,699 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:42:51,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:42:52,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:52,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:42:52,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:42:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-20 22:42:52,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:42:52,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096671923] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:52,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:42:52,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-20 22:42:52,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877116361] [2022-07-20 22:42:52,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:52,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:52,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:52,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:52,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:42:52,584 INFO L87 Difference]: Start difference. First operand 1484 states and 2210 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:52,690 INFO L93 Difference]: Finished difference Result 3423 states and 5122 transitions. [2022-07-20 22:42:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:52,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 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 196 [2022-07-20 22:42:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:52,696 INFO L225 Difference]: With dead ends: 3423 [2022-07-20 22:42:52,696 INFO L226 Difference]: Without dead ends: 1962 [2022-07-20 22:42:52,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:42:52,698 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 163 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:52,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 384 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:52,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2022-07-20 22:42:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1962. [2022-07-20 22:42:52,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.4915859255481898) internal successors, (2925), 1961 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2925 transitions. [2022-07-20 22:42:52,736 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2925 transitions. Word has length 196 [2022-07-20 22:42:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:52,736 INFO L495 AbstractCegarLoop]: Abstraction has 1962 states and 2925 transitions. [2022-07-20 22:42:52,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2925 transitions. [2022-07-20 22:42:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-07-20 22:42:52,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:52,740 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:52,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:42:52,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-20 22:42:52,955 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:52,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:52,956 INFO L85 PathProgramCache]: Analyzing trace with hash -489247903, now seen corresponding path program 1 times [2022-07-20 22:42:52,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:52,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005670465] [2022-07-20 22:42:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:52,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-07-20 22:42:53,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:53,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005670465] [2022-07-20 22:42:53,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005670465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:53,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:53,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:53,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189034895] [2022-07-20 22:42:53,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:53,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:53,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:53,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:53,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:53,117 INFO L87 Difference]: Start difference. First operand 1962 states and 2925 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:53,199 INFO L93 Difference]: Finished difference Result 4379 states and 6552 transitions. [2022-07-20 22:42:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 198 [2022-07-20 22:42:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:53,207 INFO L225 Difference]: With dead ends: 4379 [2022-07-20 22:42:53,207 INFO L226 Difference]: Without dead ends: 2440 [2022-07-20 22:42:53,210 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:53,210 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:53,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 383 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:42:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2022-07-20 22:42:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2440. [2022-07-20 22:42:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 1.4928249282492825) internal successors, (3641), 2439 states have internal predecessors, (3641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 3641 transitions. [2022-07-20 22:42:53,254 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 3641 transitions. Word has length 198 [2022-07-20 22:42:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:53,255 INFO L495 AbstractCegarLoop]: Abstraction has 2440 states and 3641 transitions. [2022-07-20 22:42:53,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 3641 transitions. [2022-07-20 22:42:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-07-20 22:42:53,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:53,259 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:42:53,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-20 22:42:53,260 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1545883921, now seen corresponding path program 1 times [2022-07-20 22:42:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:53,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931560531] [2022-07-20 22:42:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:53,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-20 22:42:53,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:53,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931560531] [2022-07-20 22:42:53,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931560531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:53,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:53,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:53,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952921297] [2022-07-20 22:42:53,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:53,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:53,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:53,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:53,427 INFO L87 Difference]: Start difference. First operand 2440 states and 3641 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:53,526 INFO L93 Difference]: Finished difference Result 5335 states and 7984 transitions. [2022-07-20 22:42:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:53,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 237 [2022-07-20 22:42:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:53,535 INFO L225 Difference]: With dead ends: 5335 [2022-07-20 22:42:53,535 INFO L226 Difference]: Without dead ends: 2918 [2022-07-20 22:42:53,538 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:53,538 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 167 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:53,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 382 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:53,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2022-07-20 22:42:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2918. [2022-07-20 22:42:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2918 states, 2917 states have (on average 1.4940006856359274) internal successors, (4358), 2917 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2918 states to 2918 states and 4358 transitions. [2022-07-20 22:42:53,625 INFO L78 Accepts]: Start accepts. Automaton has 2918 states and 4358 transitions. Word has length 237 [2022-07-20 22:42:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:53,625 INFO L495 AbstractCegarLoop]: Abstraction has 2918 states and 4358 transitions. [2022-07-20 22:42:53,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2918 states and 4358 transitions. [2022-07-20 22:42:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-20 22:42:53,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:53,631 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 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, 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] [2022-07-20 22:42:53,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-20 22:42:53,631 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:53,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1779514151, now seen corresponding path program 1 times [2022-07-20 22:42:53,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:53,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113693825] [2022-07-20 22:42:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:53,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-20 22:42:53,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:53,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113693825] [2022-07-20 22:42:53,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113693825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:53,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:53,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:53,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631918362] [2022-07-20 22:42:53,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:53,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:53,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:53,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:53,767 INFO L87 Difference]: Start difference. First operand 2918 states and 4358 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:53,893 INFO L93 Difference]: Finished difference Result 6291 states and 9418 transitions. [2022-07-20 22:42:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:53,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-07-20 22:42:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:53,900 INFO L225 Difference]: With dead ends: 6291 [2022-07-20 22:42:53,900 INFO L226 Difference]: Without dead ends: 3396 [2022-07-20 22:42:53,903 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:53,903 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 168 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:53,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 381 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3396 states. [2022-07-20 22:42:53,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3396 to 3396. [2022-07-20 22:42:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3395 states have (on average 1.495139911634757) internal successors, (5076), 3395 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:53,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 5076 transitions. [2022-07-20 22:42:53,966 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 5076 transitions. Word has length 239 [2022-07-20 22:42:53,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:53,967 INFO L495 AbstractCegarLoop]: Abstraction has 3396 states and 5076 transitions. [2022-07-20 22:42:53,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:53,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 5076 transitions. [2022-07-20 22:42:53,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-07-20 22:42:53,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:53,972 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 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, 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] [2022-07-20 22:42:53,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-20 22:42:53,972 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash 29939523, now seen corresponding path program 1 times [2022-07-20 22:42:53,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:53,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459177757] [2022-07-20 22:42:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:53,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2022-07-20 22:42:54,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:54,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459177757] [2022-07-20 22:42:54,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459177757] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:54,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:54,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:54,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754250238] [2022-07-20 22:42:54,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:54,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:54,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:54,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:54,182 INFO L87 Difference]: Start difference. First operand 3396 states and 5076 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:54,283 INFO L93 Difference]: Finished difference Result 7240 states and 10843 transitions. [2022-07-20 22:42:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:54,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2022-07-20 22:42:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:54,295 INFO L225 Difference]: With dead ends: 7240 [2022-07-20 22:42:54,295 INFO L226 Difference]: Without dead ends: 3867 [2022-07-20 22:42:54,299 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:54,299 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:54,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 587 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2022-07-20 22:42:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3867. [2022-07-20 22:42:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 1.494568028970512) internal successors, (5778), 3866 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 5778 transitions. [2022-07-20 22:42:54,404 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 5778 transitions. Word has length 271 [2022-07-20 22:42:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:54,404 INFO L495 AbstractCegarLoop]: Abstraction has 3867 states and 5778 transitions. [2022-07-20 22:42:54,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 5778 transitions. [2022-07-20 22:42:54,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-07-20 22:42:54,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:54,410 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 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, 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] [2022-07-20 22:42:54,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-20 22:42:54,410 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:54,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:54,410 INFO L85 PathProgramCache]: Analyzing trace with hash 278086017, now seen corresponding path program 1 times [2022-07-20 22:42:54,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:54,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587027321] [2022-07-20 22:42:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:54,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-07-20 22:42:54,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:54,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587027321] [2022-07-20 22:42:54,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587027321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:54,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:54,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:54,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547943816] [2022-07-20 22:42:54,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:54,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:54,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:54,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:54,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:54,556 INFO L87 Difference]: Start difference. First operand 3867 states and 5778 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:54,684 INFO L93 Difference]: Finished difference Result 8156 states and 12209 transitions. [2022-07-20 22:42:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:54,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2022-07-20 22:42:54,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:54,692 INFO L225 Difference]: With dead ends: 8156 [2022-07-20 22:42:54,692 INFO L226 Difference]: Without dead ends: 4312 [2022-07-20 22:42:54,696 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:54,696 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 158 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:54,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 590 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2022-07-20 22:42:54,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 4312. [2022-07-20 22:42:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4312 states, 4311 states have (on average 1.4936209696126188) internal successors, (6439), 4311 states have internal predecessors, (6439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4312 states to 4312 states and 6439 transitions. [2022-07-20 22:42:54,797 INFO L78 Accepts]: Start accepts. Automaton has 4312 states and 6439 transitions. Word has length 271 [2022-07-20 22:42:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:54,797 INFO L495 AbstractCegarLoop]: Abstraction has 4312 states and 6439 transitions. [2022-07-20 22:42:54,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4312 states and 6439 transitions. [2022-07-20 22:42:54,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-07-20 22:42:54,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:54,805 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 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, 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] [2022-07-20 22:42:54,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-20 22:42:54,806 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:54,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1434461779, now seen corresponding path program 1 times [2022-07-20 22:42:54,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:54,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423469007] [2022-07-20 22:42:54,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:54,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 434 proven. 0 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2022-07-20 22:42:55,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:55,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423469007] [2022-07-20 22:42:55,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423469007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:55,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:55,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:55,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581005053] [2022-07-20 22:42:55,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:55,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:55,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:55,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:55,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:55,017 INFO L87 Difference]: Start difference. First operand 4312 states and 6439 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:55,157 INFO L93 Difference]: Finished difference Result 9079 states and 13580 transitions. [2022-07-20 22:42:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:55,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 346 [2022-07-20 22:42:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:55,166 INFO L225 Difference]: With dead ends: 9079 [2022-07-20 22:42:55,166 INFO L226 Difference]: Without dead ends: 4790 [2022-07-20 22:42:55,171 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:55,171 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:55,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 378 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:55,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4790 states. [2022-07-20 22:42:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4790 to 4790. [2022-07-20 22:42:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4790 states, 4789 states have (on average 1.4950929212779285) internal successors, (7160), 4789 states have internal predecessors, (7160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4790 states to 4790 states and 7160 transitions. [2022-07-20 22:42:55,289 INFO L78 Accepts]: Start accepts. Automaton has 4790 states and 7160 transitions. Word has length 346 [2022-07-20 22:42:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:55,290 INFO L495 AbstractCegarLoop]: Abstraction has 4790 states and 7160 transitions. [2022-07-20 22:42:55,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4790 states and 7160 transitions. [2022-07-20 22:42:55,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-07-20 22:42:55,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:55,298 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 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, 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] [2022-07-20 22:42:55,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-20 22:42:55,298 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:55,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:55,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1169005770, now seen corresponding path program 1 times [2022-07-20 22:42:55,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:55,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359576969] [2022-07-20 22:42:55,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:55,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1443 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2022-07-20 22:42:55,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:55,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359576969] [2022-07-20 22:42:55,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359576969] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:55,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:55,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:55,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292700215] [2022-07-20 22:42:55,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:55,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:55,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:55,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:55,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:55,497 INFO L87 Difference]: Start difference. First operand 4790 states and 7160 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:55,623 INFO L93 Difference]: Finished difference Result 10035 states and 15022 transitions. [2022-07-20 22:42:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 387 [2022-07-20 22:42:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:55,633 INFO L225 Difference]: With dead ends: 10035 [2022-07-20 22:42:55,633 INFO L226 Difference]: Without dead ends: 5268 [2022-07-20 22:42:55,637 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:55,640 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:55,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 377 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2022-07-20 22:42:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 5268. [2022-07-20 22:42:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5268 states, 5267 states have (on average 1.496487564078223) internal successors, (7882), 5267 states have internal predecessors, (7882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5268 states to 5268 states and 7882 transitions. [2022-07-20 22:42:55,770 INFO L78 Accepts]: Start accepts. Automaton has 5268 states and 7882 transitions. Word has length 387 [2022-07-20 22:42:55,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:55,771 INFO L495 AbstractCegarLoop]: Abstraction has 5268 states and 7882 transitions. [2022-07-20 22:42:55,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 5268 states and 7882 transitions. [2022-07-20 22:42:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-07-20 22:42:55,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:55,779 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 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, 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] [2022-07-20 22:42:55,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-20 22:42:55,779 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:55,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:55,780 INFO L85 PathProgramCache]: Analyzing trace with hash -477358949, now seen corresponding path program 1 times [2022-07-20 22:42:55,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:55,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097076510] [2022-07-20 22:42:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:55,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2022-07-20 22:42:55,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:55,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097076510] [2022-07-20 22:42:55,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097076510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:55,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:55,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:55,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195403379] [2022-07-20 22:42:55,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:55,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:55,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:55,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:55,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:55,969 INFO L87 Difference]: Start difference. First operand 5268 states and 7882 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:56,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:56,096 INFO L93 Difference]: Finished difference Result 10985 states and 16457 transitions. [2022-07-20 22:42:56,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:56,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 394 [2022-07-20 22:42:56,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:56,106 INFO L225 Difference]: With dead ends: 10985 [2022-07-20 22:42:56,106 INFO L226 Difference]: Without dead ends: 5740 [2022-07-20 22:42:56,112 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:56,112 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:56,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 587 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5740 states. [2022-07-20 22:42:56,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5740 to 5740. [2022-07-20 22:42:56,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5740 states, 5739 states have (on average 1.4959052099668932) internal successors, (8585), 5739 states have internal predecessors, (8585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5740 states to 5740 states and 8585 transitions. [2022-07-20 22:42:56,241 INFO L78 Accepts]: Start accepts. Automaton has 5740 states and 8585 transitions. Word has length 394 [2022-07-20 22:42:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:56,242 INFO L495 AbstractCegarLoop]: Abstraction has 5740 states and 8585 transitions. [2022-07-20 22:42:56,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5740 states and 8585 transitions. [2022-07-20 22:42:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-07-20 22:42:56,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:56,251 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 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, 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] [2022-07-20 22:42:56,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-20 22:42:56,251 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1914583371, now seen corresponding path program 1 times [2022-07-20 22:42:56,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:56,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400267471] [2022-07-20 22:42:56,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2119 backedges. 641 proven. 0 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2022-07-20 22:42:56,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:56,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400267471] [2022-07-20 22:42:56,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400267471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:56,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:56,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:56,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446962218] [2022-07-20 22:42:56,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:56,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:56,469 INFO L87 Difference]: Start difference. First operand 5740 states and 8585 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:56,596 INFO L93 Difference]: Finished difference Result 11935 states and 17872 transitions. [2022-07-20 22:42:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:56,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 470 [2022-07-20 22:42:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:56,607 INFO L225 Difference]: With dead ends: 11935 [2022-07-20 22:42:56,607 INFO L226 Difference]: Without dead ends: 6218 [2022-07-20 22:42:56,612 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:56,613 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:56,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 375 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2022-07-20 22:42:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 6218. [2022-07-20 22:42:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6218 states, 6217 states have (on average 1.4973459868103587) internal successors, (9309), 6217 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6218 states to 6218 states and 9309 transitions. [2022-07-20 22:42:56,819 INFO L78 Accepts]: Start accepts. Automaton has 6218 states and 9309 transitions. Word has length 470 [2022-07-20 22:42:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:56,820 INFO L495 AbstractCegarLoop]: Abstraction has 6218 states and 9309 transitions. [2022-07-20 22:42:56,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6218 states and 9309 transitions. [2022-07-20 22:42:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2022-07-20 22:42:56,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:56,832 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 6, 3, 3, 3, 3, 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, 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] [2022-07-20 22:42:56,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-20 22:42:56,833 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2096433782, now seen corresponding path program 1 times [2022-07-20 22:42:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:56,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775423953] [2022-07-20 22:42:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:56,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 744 proven. 7 refuted. 0 times theorem prover too weak. 1761 trivial. 0 not checked. [2022-07-20 22:42:57,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:57,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775423953] [2022-07-20 22:42:57,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775423953] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:42:57,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273867637] [2022-07-20 22:42:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:57,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:42:57,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:42:57,122 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:42:57,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:42:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:58,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 2354 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:42:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:42:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 707 proven. 0 refuted. 0 times theorem prover too weak. 1805 trivial. 0 not checked. [2022-07-20 22:42:58,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:42:58,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273867637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:58,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:42:58,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-20 22:42:58,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482553497] [2022-07-20 22:42:58,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:58,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:58,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:58,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:42:58,315 INFO L87 Difference]: Start difference. First operand 6218 states and 9309 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:58,435 INFO L93 Difference]: Finished difference Result 12891 states and 19320 transitions. [2022-07-20 22:42:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:42:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 512 [2022-07-20 22:42:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:58,447 INFO L225 Difference]: With dead ends: 12891 [2022-07-20 22:42:58,447 INFO L226 Difference]: Without dead ends: 6696 [2022-07-20 22:42:58,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:42:58,455 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:58,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 374 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:42:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6696 states. [2022-07-20 22:42:58,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6696 to 6696. [2022-07-20 22:42:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6696 states, 6695 states have (on average 1.4987303958177745) internal successors, (10034), 6695 states have internal predecessors, (10034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6696 states to 6696 states and 10034 transitions. [2022-07-20 22:42:58,640 INFO L78 Accepts]: Start accepts. Automaton has 6696 states and 10034 transitions. Word has length 512 [2022-07-20 22:42:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:58,640 INFO L495 AbstractCegarLoop]: Abstraction has 6696 states and 10034 transitions. [2022-07-20 22:42:58,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6696 states and 10034 transitions. [2022-07-20 22:42:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2022-07-20 22:42:58,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:58,653 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 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, 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] [2022-07-20 22:42:58,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:42:58,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-20 22:42:58,879 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:58,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2030741037, now seen corresponding path program 1 times [2022-07-20 22:42:58,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:58,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585227791] [2022-07-20 22:42:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:58,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2022-07-20 22:42:59,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:59,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585227791] [2022-07-20 22:42:59,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585227791] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:59,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:59,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:42:59,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145460133] [2022-07-20 22:42:59,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:59,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:42:59,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:59,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:42:59,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:42:59,098 INFO L87 Difference]: Start difference. First operand 6696 states and 10034 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:59,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:42:59,536 INFO L93 Difference]: Finished difference Result 14544 states and 21738 transitions. [2022-07-20 22:42:59,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:42:59,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 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 520 [2022-07-20 22:42:59,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:42:59,549 INFO L225 Difference]: With dead ends: 14544 [2022-07-20 22:42:59,549 INFO L226 Difference]: Without dead ends: 7871 [2022-07-20 22:42:59,557 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:42:59,558 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 73 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:42:59,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 703 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:42:59,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2022-07-20 22:42:59,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 7270. [2022-07-20 22:42:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7270 states, 7269 states have (on average 1.4997936442426745) internal successors, (10902), 7269 states have internal predecessors, (10902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7270 states to 7270 states and 10902 transitions. [2022-07-20 22:42:59,697 INFO L78 Accepts]: Start accepts. Automaton has 7270 states and 10902 transitions. Word has length 520 [2022-07-20 22:42:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:42:59,698 INFO L495 AbstractCegarLoop]: Abstraction has 7270 states and 10902 transitions. [2022-07-20 22:42:59,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:42:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 7270 states and 10902 transitions. [2022-07-20 22:42:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2022-07-20 22:42:59,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:42:59,708 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 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, 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] [2022-07-20 22:42:59,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-20 22:42:59,708 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:42:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:42:59,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1407400015, now seen corresponding path program 1 times [2022-07-20 22:42:59,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:42:59,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223222594] [2022-07-20 22:42:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:42:59,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:42:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:42:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 393 proven. 0 refuted. 0 times theorem prover too weak. 2135 trivial. 0 not checked. [2022-07-20 22:42:59,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:42:59,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223222594] [2022-07-20 22:42:59,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223222594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:42:59,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:42:59,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:42:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427844425] [2022-07-20 22:42:59,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:42:59,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:42:59,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:42:59,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:42:59,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:42:59,973 INFO L87 Difference]: Start difference. First operand 7270 states and 10902 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:00,118 INFO L93 Difference]: Finished difference Result 15031 states and 22561 transitions. [2022-07-20 22:43:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:43:00,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 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 520 [2022-07-20 22:43:00,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:00,126 INFO L225 Difference]: With dead ends: 15031 [2022-07-20 22:43:00,126 INFO L226 Difference]: Without dead ends: 7784 [2022-07-20 22:43:00,131 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:43:00,131 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:00,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 587 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:43:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7784 states. [2022-07-20 22:43:00,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7784 to 7784. [2022-07-20 22:43:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7784 states, 7783 states have (on average 1.4991648464602338) internal successors, (11668), 7783 states have internal predecessors, (11668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:00,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7784 states to 7784 states and 11668 transitions. [2022-07-20 22:43:00,265 INFO L78 Accepts]: Start accepts. Automaton has 7784 states and 11668 transitions. Word has length 520 [2022-07-20 22:43:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:00,266 INFO L495 AbstractCegarLoop]: Abstraction has 7784 states and 11668 transitions. [2022-07-20 22:43:00,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:00,266 INFO L276 IsEmpty]: Start isEmpty. Operand 7784 states and 11668 transitions. [2022-07-20 22:43:00,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 598 [2022-07-20 22:43:00,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:00,277 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 14, 14, 13, 13, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 8, 4, 4, 4, 4, 3, 3, 3, 2, 2, 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, 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] [2022-07-20 22:43:00,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-20 22:43:00,277 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:00,278 INFO L85 PathProgramCache]: Analyzing trace with hash -876039620, now seen corresponding path program 1 times [2022-07-20 22:43:00,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:00,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288920920] [2022-07-20 22:43:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:00,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3410 backedges. 849 proven. 0 refuted. 0 times theorem prover too weak. 2561 trivial. 0 not checked. [2022-07-20 22:43:00,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:00,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288920920] [2022-07-20 22:43:00,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288920920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:00,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:00,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:43:00,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243031837] [2022-07-20 22:43:00,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:00,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:43:00,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:43:00,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:43:00,532 INFO L87 Difference]: Start difference. First operand 7784 states and 11668 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:00,703 INFO L93 Difference]: Finished difference Result 16064 states and 24100 transitions. [2022-07-20 22:43:00,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:43:00,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 597 [2022-07-20 22:43:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:00,713 INFO L225 Difference]: With dead ends: 16064 [2022-07-20 22:43:00,713 INFO L226 Difference]: Without dead ends: 8303 [2022-07-20 22:43:00,719 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:43:00,720 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 158 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:00,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 372 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:43:00,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8303 states. [2022-07-20 22:43:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8303 to 8303. [2022-07-20 22:43:00,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8303 states, 8302 states have (on average 1.5004818116116598) internal successors, (12457), 8302 states have internal predecessors, (12457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8303 states to 8303 states and 12457 transitions. [2022-07-20 22:43:00,837 INFO L78 Accepts]: Start accepts. Automaton has 8303 states and 12457 transitions. Word has length 597 [2022-07-20 22:43:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:00,837 INFO L495 AbstractCegarLoop]: Abstraction has 8303 states and 12457 transitions. [2022-07-20 22:43:00,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 8303 states and 12457 transitions. [2022-07-20 22:43:00,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-20 22:43:00,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:00,849 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 9, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-20 22:43:00,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-20 22:43:00,849 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:00,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1729200158, now seen corresponding path program 1 times [2022-07-20 22:43:00,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:00,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545573729] [2022-07-20 22:43:00,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:00,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3915 backedges. 914 proven. 0 refuted. 0 times theorem prover too weak. 3001 trivial. 0 not checked. [2022-07-20 22:43:01,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:01,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545573729] [2022-07-20 22:43:01,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545573729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:01,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:01,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:43:01,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464710520] [2022-07-20 22:43:01,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:01,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:43:01,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:01,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:43:01,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:43:01,112 INFO L87 Difference]: Start difference. First operand 8303 states and 12457 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:01,235 INFO L93 Difference]: Finished difference Result 8824 states and 13249 transitions. [2022-07-20 22:43:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:43:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 640 [2022-07-20 22:43:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:01,243 INFO L225 Difference]: With dead ends: 8824 [2022-07-20 22:43:01,243 INFO L226 Difference]: Without dead ends: 8822 [2022-07-20 22:43:01,245 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:43:01,245 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 159 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:01,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 371 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:43:01,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8822 states. [2022-07-20 22:43:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8822 to 8822. [2022-07-20 22:43:01,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 1.5017571703888448) internal successors, (13247), 8821 states have internal predecessors, (13247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 13247 transitions. [2022-07-20 22:43:01,450 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 13247 transitions. Word has length 640 [2022-07-20 22:43:01,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:01,451 INFO L495 AbstractCegarLoop]: Abstraction has 8822 states and 13247 transitions. [2022-07-20 22:43:01,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 13247 transitions. [2022-07-20 22:43:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2022-07-20 22:43:01,462 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:01,462 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:43:01,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-07-20 22:43:01,463 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:01,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:01,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1235463390, now seen corresponding path program 1 times [2022-07-20 22:43:01,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:01,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211905092] [2022-07-20 22:43:01,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:01,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 2676 proven. 480 refuted. 0 times theorem prover too weak. 790 trivial. 0 not checked. [2022-07-20 22:43:02,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:02,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211905092] [2022-07-20 22:43:02,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211905092] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:43:02,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504035626] [2022-07-20 22:43:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:02,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:43:02,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:43:02,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:43:02,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:43:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:03,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 2846 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 22:43:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:43:03,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-07-20 22:43:03,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2022-07-20 22:43:03,675 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-07-20 22:43:03,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 33 [2022-07-20 22:43:03,763 INFO L356 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-07-20 22:43:03,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 45 [2022-07-20 22:43:03,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-07-20 22:43:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3946 backedges. 2245 proven. 0 refuted. 0 times theorem prover too weak. 1701 trivial. 0 not checked. [2022-07-20 22:43:03,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:43:03,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504035626] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:03,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:43:03,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 15 [2022-07-20 22:43:03,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882947588] [2022-07-20 22:43:03,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:03,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:43:03,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:43:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:43:03,848 INFO L87 Difference]: Start difference. First operand 8822 states and 13247 transitions. Second operand has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 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) [2022-07-20 22:43:05,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:05,454 INFO L93 Difference]: Finished difference Result 24937 states and 37503 transitions. [2022-07-20 22:43:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:43:05,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 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) Word has length 649 [2022-07-20 22:43:05,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:05,476 INFO L225 Difference]: With dead ends: 24937 [2022-07-20 22:43:05,476 INFO L226 Difference]: Without dead ends: 16138 [2022-07-20 22:43:05,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 653 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:43:05,489 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 127 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:05,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1140 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 478 Invalid, 0 Unknown, 82 Unchecked, 1.3s Time] [2022-07-20 22:43:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2022-07-20 22:43:05,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 15847. [2022-07-20 22:43:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15847 states, 15846 states have (on average 1.5089612520509907) internal successors, (23911), 15846 states have internal predecessors, (23911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15847 states to 15847 states and 23911 transitions. [2022-07-20 22:43:05,880 INFO L78 Accepts]: Start accepts. Automaton has 15847 states and 23911 transitions. Word has length 649 [2022-07-20 22:43:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:05,881 INFO L495 AbstractCegarLoop]: Abstraction has 15847 states and 23911 transitions. [2022-07-20 22:43:05,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.333333333333336) internal successors, (218), 6 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) [2022-07-20 22:43:05,881 INFO L276 IsEmpty]: Start isEmpty. Operand 15847 states and 23911 transitions. [2022-07-20 22:43:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-07-20 22:43:05,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:05,900 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-20 22:43:05,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:43:06,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:43:06,111 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash 71254686, now seen corresponding path program 1 times [2022-07-20 22:43:06,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:06,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588413004] [2022-07-20 22:43:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:06,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:06,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3953 backedges. 2140 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2022-07-20 22:43:06,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:06,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588413004] [2022-07-20 22:43:06,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588413004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:06,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:06,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534028694] [2022-07-20 22:43:06,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:06,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:06,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:06,399 INFO L87 Difference]: Start difference. First operand 15847 states and 23911 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:07,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:07,209 INFO L93 Difference]: Finished difference Result 33097 states and 49753 transitions. [2022-07-20 22:43:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:07,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 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 651 [2022-07-20 22:43:07,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:07,228 INFO L225 Difference]: With dead ends: 33097 [2022-07-20 22:43:07,228 INFO L226 Difference]: Without dead ends: 17273 [2022-07-20 22:43:07,240 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:43:07,241 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 71 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:07,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 701 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:43:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17273 states. [2022-07-20 22:43:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17273 to 15881. [2022-07-20 22:43:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15881 states, 15880 states have (on average 1.5078715365239295) internal successors, (23945), 15880 states have internal predecessors, (23945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15881 states to 15881 states and 23945 transitions. [2022-07-20 22:43:07,495 INFO L78 Accepts]: Start accepts. Automaton has 15881 states and 23945 transitions. Word has length 651 [2022-07-20 22:43:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:07,495 INFO L495 AbstractCegarLoop]: Abstraction has 15881 states and 23945 transitions. [2022-07-20 22:43:07,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:07,495 INFO L276 IsEmpty]: Start isEmpty. Operand 15881 states and 23945 transitions. [2022-07-20 22:43:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2022-07-20 22:43:07,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:07,516 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 16, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:43:07,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-07-20 22:43:07,516 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:07,517 INFO L85 PathProgramCache]: Analyzing trace with hash -645334114, now seen corresponding path program 1 times [2022-07-20 22:43:07,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:07,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923081327] [2022-07-20 22:43:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:07,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4578 backedges. 2478 proven. 187 refuted. 0 times theorem prover too weak. 1913 trivial. 0 not checked. [2022-07-20 22:43:07,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:07,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923081327] [2022-07-20 22:43:07,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923081327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:43:07,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575459422] [2022-07-20 22:43:07,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:07,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:43:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:43:07,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:43:07,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:43:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:09,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 3008 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 22:43:09,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:43:09,151 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:43:09,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-20 22:43:09,182 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:43:09,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 22:43:09,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 22:43:09,217 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:43:09,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 22:43:09,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 22:43:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4578 backedges. 1683 proven. 240 refuted. 0 times theorem prover too weak. 2655 trivial. 0 not checked. [2022-07-20 22:43:09,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:43:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4578 backedges. 1688 proven. 0 refuted. 0 times theorem prover too weak. 2890 trivial. 0 not checked. [2022-07-20 22:43:09,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575459422] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:43:09,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:43:09,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-07-20 22:43:09,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457137064] [2022-07-20 22:43:09,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:09,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:09,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:09,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:09,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:43:09,312 INFO L87 Difference]: Start difference. First operand 15881 states and 23945 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:10,527 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:10,983 INFO L93 Difference]: Finished difference Result 34069 states and 51119 transitions. [2022-07-20 22:43:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:10,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 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 693 [2022-07-20 22:43:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:11,002 INFO L225 Difference]: With dead ends: 34069 [2022-07-20 22:43:11,002 INFO L226 Difference]: Without dead ends: 18211 [2022-07-20 22:43:11,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1393 GetRequests, 1385 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:43:11,016 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 140 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:11,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 455 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 22:43:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18211 states. [2022-07-20 22:43:11,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18211 to 15881. [2022-07-20 22:43:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15881 states, 15880 states have (on average 1.488727959697733) internal successors, (23641), 15880 states have internal predecessors, (23641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15881 states to 15881 states and 23641 transitions. [2022-07-20 22:43:11,287 INFO L78 Accepts]: Start accepts. Automaton has 15881 states and 23641 transitions. Word has length 693 [2022-07-20 22:43:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:11,287 INFO L495 AbstractCegarLoop]: Abstraction has 15881 states and 23641 transitions. [2022-07-20 22:43:11,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 15881 states and 23641 transitions. [2022-07-20 22:43:11,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2022-07-20 22:43:11,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:11,303 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-20 22:43:11,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:43:11,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:43:11,504 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:11,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:11,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2077505566, now seen corresponding path program 1 times [2022-07-20 22:43:11,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:11,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673613406] [2022-07-20 22:43:11,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:11,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4638 backedges. 2542 proven. 46 refuted. 0 times theorem prover too weak. 2050 trivial. 0 not checked. [2022-07-20 22:43:11,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:11,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673613406] [2022-07-20 22:43:11,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673613406] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:43:11,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058669546] [2022-07-20 22:43:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:11,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:43:11,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:43:11,812 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:43:11,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:43:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:13,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 3024 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 22:43:13,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:43:13,162 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:43:13,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-20 22:43:13,196 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:43:13,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 22:43:13,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-07-20 22:43:13,246 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:43:13,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-20 22:43:13,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 22:43:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4638 backedges. 2537 proven. 238 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2022-07-20 22:43:13,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:43:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4638 backedges. 2510 proven. 0 refuted. 0 times theorem prover too weak. 2128 trivial. 0 not checked. [2022-07-20 22:43:13,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058669546] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:43:13,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:43:13,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8] total 10 [2022-07-20 22:43:13,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19614643] [2022-07-20 22:43:13,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:13,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:13,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:13,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:43:13,390 INFO L87 Difference]: Start difference. First operand 15881 states and 23641 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:14,240 INFO L93 Difference]: Finished difference Result 34069 states and 50511 transitions. [2022-07-20 22:43:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:14,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 693 [2022-07-20 22:43:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:14,258 INFO L225 Difference]: With dead ends: 34069 [2022-07-20 22:43:14,259 INFO L226 Difference]: Without dead ends: 18211 [2022-07-20 22:43:14,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1393 GetRequests, 1384 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:43:14,270 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 121 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:14,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 565 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:43:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18211 states. [2022-07-20 22:43:14,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18211 to 15915. [2022-07-20 22:43:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15915 states, 15914 states have (on average 1.4876838004272968) internal successors, (23675), 15914 states have internal predecessors, (23675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15915 states to 15915 states and 23675 transitions. [2022-07-20 22:43:14,525 INFO L78 Accepts]: Start accepts. Automaton has 15915 states and 23675 transitions. Word has length 693 [2022-07-20 22:43:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:14,525 INFO L495 AbstractCegarLoop]: Abstraction has 15915 states and 23675 transitions. [2022-07-20 22:43:14,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 15915 states and 23675 transitions. [2022-07-20 22:43:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2022-07-20 22:43:14,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:14,542 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 16, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-20 22:43:14,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:43:14,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:43:14,743 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:14,743 INFO L85 PathProgramCache]: Analyzing trace with hash 392922944, now seen corresponding path program 1 times [2022-07-20 22:43:14,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:14,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600790161] [2022-07-20 22:43:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:14,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:14,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4611 backedges. 2511 proven. 0 refuted. 0 times theorem prover too weak. 2100 trivial. 0 not checked. [2022-07-20 22:43:15,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:15,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600790161] [2022-07-20 22:43:15,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600790161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:15,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:15,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:15,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360873968] [2022-07-20 22:43:15,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:15,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:15,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:15,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:15,030 INFO L87 Difference]: Start difference. First operand 15915 states and 23675 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:16,426 INFO L93 Difference]: Finished difference Result 33063 states and 49021 transitions. [2022-07-20 22:43:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:16,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 695 [2022-07-20 22:43:16,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:16,443 INFO L225 Difference]: With dead ends: 33063 [2022-07-20 22:43:16,443 INFO L226 Difference]: Without dead ends: 17171 [2022-07-20 22:43:16,455 INFO L412 NwaCegarLoop]: 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 [2022-07-20 22:43:16,455 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 84 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:16,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 691 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 22:43:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17171 states. [2022-07-20 22:43:16,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17171 to 15915. [2022-07-20 22:43:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15915 states, 15914 states have (on average 1.4855473168279503) internal successors, (23641), 15914 states have internal predecessors, (23641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15915 states to 15915 states and 23641 transitions. [2022-07-20 22:43:16,795 INFO L78 Accepts]: Start accepts. Automaton has 15915 states and 23641 transitions. Word has length 695 [2022-07-20 22:43:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:16,795 INFO L495 AbstractCegarLoop]: Abstraction has 15915 states and 23641 transitions. [2022-07-20 22:43:16,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:16,795 INFO L276 IsEmpty]: Start isEmpty. Operand 15915 states and 23641 transitions. [2022-07-20 22:43:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 696 [2022-07-20 22:43:16,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:16,812 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 15, 15, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:43:16,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-07-20 22:43:16,813 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:16,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:16,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1108902090, now seen corresponding path program 1 times [2022-07-20 22:43:16,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:16,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917351891] [2022-07-20 22:43:16,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:16,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4645 backedges. 2441 proven. 0 refuted. 0 times theorem prover too weak. 2204 trivial. 0 not checked. [2022-07-20 22:43:17,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:17,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917351891] [2022-07-20 22:43:17,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917351891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:17,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:17,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:17,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266893881] [2022-07-20 22:43:17,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:17,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:17,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:17,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:17,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:17,132 INFO L87 Difference]: Start difference. First operand 15915 states and 23641 transitions. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:18,023 INFO L93 Difference]: Finished difference Result 33167 states and 49191 transitions. [2022-07-20 22:43:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 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 695 [2022-07-20 22:43:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:18,040 INFO L225 Difference]: With dead ends: 33167 [2022-07-20 22:43:18,040 INFO L226 Difference]: Without dead ends: 17275 [2022-07-20 22:43:18,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:43:18,051 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 29 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:18,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 629 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:43:18,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17275 states. [2022-07-20 22:43:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17275 to 16799. [2022-07-20 22:43:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16799 states, 16798 states have (on average 1.48225979283248) internal successors, (24899), 16798 states have internal predecessors, (24899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:18,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16799 states to 16799 states and 24899 transitions. [2022-07-20 22:43:18,315 INFO L78 Accepts]: Start accepts. Automaton has 16799 states and 24899 transitions. Word has length 695 [2022-07-20 22:43:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:18,315 INFO L495 AbstractCegarLoop]: Abstraction has 16799 states and 24899 transitions. [2022-07-20 22:43:18,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 16799 states and 24899 transitions. [2022-07-20 22:43:18,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2022-07-20 22:43:18,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:18,332 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:43:18,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-20 22:43:18,332 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:18,333 INFO L85 PathProgramCache]: Analyzing trace with hash 728876478, now seen corresponding path program 1 times [2022-07-20 22:43:18,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:18,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292733148] [2022-07-20 22:43:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:18,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4762 backedges. 2525 proven. 0 refuted. 0 times theorem prover too weak. 2237 trivial. 0 not checked. [2022-07-20 22:43:18,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:18,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292733148] [2022-07-20 22:43:18,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292733148] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:43:18,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:43:18,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:43:18,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285561044] [2022-07-20 22:43:18,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:43:18,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:43:18,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:43:18,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:43:18,607 INFO L87 Difference]: Start difference. First operand 16799 states and 24899 transitions. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:43:19,378 INFO L93 Difference]: Finished difference Result 33983 states and 50348 transitions. [2022-07-20 22:43:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:43:19,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 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 701 [2022-07-20 22:43:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:43:19,395 INFO L225 Difference]: With dead ends: 33983 [2022-07-20 22:43:19,395 INFO L226 Difference]: Without dead ends: 17207 [2022-07-20 22:43:19,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:43:19,407 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 43 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:43:19,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 644 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:43:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17207 states. [2022-07-20 22:43:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17207 to 16799. [2022-07-20 22:43:19,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16799 states, 16798 states have (on average 1.48124776759138) internal successors, (24882), 16798 states have internal predecessors, (24882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16799 states to 16799 states and 24882 transitions. [2022-07-20 22:43:19,669 INFO L78 Accepts]: Start accepts. Automaton has 16799 states and 24882 transitions. Word has length 701 [2022-07-20 22:43:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:43:19,670 INFO L495 AbstractCegarLoop]: Abstraction has 16799 states and 24882 transitions. [2022-07-20 22:43:19,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:43:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 16799 states and 24882 transitions. [2022-07-20 22:43:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-07-20 22:43:19,687 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:43:19,687 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 18, 18, 17, 17, 16, 16, 15, 15, 15, 15, 13, 12, 12, 11, 11, 10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-20 22:43:19,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-20 22:43:19,687 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:43:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:43:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1335303222, now seen corresponding path program 1 times [2022-07-20 22:43:19,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:43:19,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462201464] [2022-07-20 22:43:19,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:19,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:43:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 1577 proven. 2924 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2022-07-20 22:43:22,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:43:22,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462201464] [2022-07-20 22:43:22,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462201464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:43:22,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325518997] [2022-07-20 22:43:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:43:22,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:43:22,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:43:22,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:43:22,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 22:43:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:43:24,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 3032 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-20 22:43:24,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:43:24,366 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:43:24,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-20 22:43:24,474 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-20 22:43:24,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 10 [2022-07-20 22:43:24,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-07-20 22:43:24,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 22:43:24,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:24,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2022-07-20 22:43:24,638 INFO L356 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2022-07-20 22:43:24,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 60 [2022-07-20 22:43:24,660 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:43:24,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-07-20 22:43:25,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:25,142 INFO L356 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2022-07-20 22:43:25,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 49 [2022-07-20 22:43:25,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:25,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-07-20 22:43:25,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:25,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-07-20 22:43:25,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:25,226 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-20 22:43:25,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 68 [2022-07-20 22:43:25,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:25,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2022-07-20 22:43:25,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:25,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2022-07-20 22:43:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:25,800 INFO L356 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2022-07-20 22:43:25,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 155 [2022-07-20 22:43:25,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:25,838 INFO L356 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-07-20 22:43:25,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 137 treesize of output 132 [2022-07-20 22:43:25,885 INFO L356 Elim1Store]: treesize reduction 45, result has 52.6 percent of original size [2022-07-20 22:43:25,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 73 [2022-07-20 22:43:27,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 305 treesize of output 251 [2022-07-20 22:43:27,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:27,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 305 treesize of output 245 [2022-07-20 22:43:27,095 INFO L356 Elim1Store]: treesize reduction 231, result has 26.4 percent of original size [2022-07-20 22:43:27,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 305 treesize of output 330 [2022-07-20 22:43:31,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:31,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:31,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:31,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 250 [2022-07-20 22:43:31,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:31,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:31,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:31,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 244 [2022-07-20 22:43:31,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:31,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:31,463 INFO L356 Elim1Store]: treesize reduction 105, result has 29.1 percent of original size [2022-07-20 22:43:31,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 317 treesize of output 314 [2022-07-20 22:43:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:31,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 114 [2022-07-20 22:43:31,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:43:31,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 72 [2022-07-20 22:43:31,830 INFO L356 Elim1Store]: treesize reduction 151, result has 29.4 percent of original size [2022-07-20 22:43:31,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 100 treesize of output 128 [2022-07-20 22:43:31,908 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-20 22:43:31,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-07-20 22:43:31,998 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:43:31,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 11 [2022-07-20 22:43:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 1764 proven. 573 refuted. 0 times theorem prover too weak. 2522 trivial. 0 not checked. [2022-07-20 22:43:32,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:43:35,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:43:35,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:43:35,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 714 treesize of output 552 [2022-07-20 22:43:35,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:43:35,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:43:35,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 924 treesize of output 768 [2022-07-20 22:43:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4859 backedges. 1895 proven. 141 refuted. 0 times theorem prover too weak. 2823 trivial. 0 not checked. [2022-07-20 22:43:36,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325518997] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:43:36,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:43:36,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 13] total 53 [2022-07-20 22:43:36,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527590966] [2022-07-20 22:43:36,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:43:36,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 22:43:36,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:43:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 22:43:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=2452, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 22:43:36,149 INFO L87 Difference]: Start difference. First operand 16799 states and 24882 transitions. Second operand has 53 states, 53 states have (on average 17.18867924528302) internal successors, (911), 53 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) [2022-07-20 22:43:39,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:42,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:44,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:47,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:43:49,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []