./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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.15.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 e559d44f6ee539bed570b1939999945f6f48ca1506c283f526f35c026a08bf8f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:56:07,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:56:07,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:56:07,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:56:07,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:56:07,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:56:07,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:56:07,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:56:07,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:56:07,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:56:07,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:56:07,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:56:07,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:56:07,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:56:07,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:56:07,199 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:56:07,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:56:07,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:56:07,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:56:07,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:56:07,210 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:56:07,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:56:07,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:56:07,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:56:07,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:56:07,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:56:07,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:56:07,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:56:07,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:56:07,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:56:07,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:56:07,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:56:07,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:56:07,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:56:07,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:56:07,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:56:07,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:56:07,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:56:07,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:56:07,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:56:07,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:56:07,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:56:07,233 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:56:07,261 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:56:07,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:56:07,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:56:07,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:56:07,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:56:07,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:56:07,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:56:07,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:56:07,264 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:56:07,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:56:07,264 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:56:07,264 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:56:07,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:56:07,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:56:07,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:56:07,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:56:07,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:56:07,265 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:56:07,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:56:07,266 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:56:07,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:56:07,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:56:07,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:56:07,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:56:07,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:56:07,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:56:07,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:56:07,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:56:07,268 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:56:07,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:56:07,268 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:56:07,268 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:56:07,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:56:07,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e559d44f6ee539bed570b1939999945f6f48ca1506c283f526f35c026a08bf8f [2022-07-11 23:56:07,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:56:07,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:56:07,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:56:07,488 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:56:07,488 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:56:07,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-2.c [2022-07-11 23:56:07,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8691221c8/d515f165b28d42f79b216e6de56ca355/FLAG45ce25a3f [2022-07-11 23:56:07,985 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:56:07,989 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-2.c [2022-07-11 23:56:08,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8691221c8/d515f165b28d42f79b216e6de56ca355/FLAG45ce25a3f [2022-07-11 23:56:08,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8691221c8/d515f165b28d42f79b216e6de56ca355 [2022-07-11 23:56:08,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:56:08,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:56:08,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:56:08,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:56:08,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:56:08,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20def7f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08, skipping insertion in model container [2022-07-11 23:56:08,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:56:08,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:56:08,373 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.15.i.cil-2.c[75833,75846] [2022-07-11 23:56:08,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:56:08,392 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:56:08,463 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.15.i.cil-2.c[75833,75846] [2022-07-11 23:56:08,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:56:08,475 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:56:08,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08 WrapperNode [2022-07-11 23:56:08,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:56:08,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:56:08,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:56:08,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:56:08,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,560 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 800 [2022-07-11 23:56:08,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:56:08,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:56:08,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:56:08,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:56:08,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,633 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:56:08,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:56:08,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:56:08,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:56:08,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08" (1/1) ... [2022-07-11 23:56:08,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:56:08,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:56:08,669 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) [2022-07-11 23:56:08,695 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 [2022-07-11 23:56:08,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:56:08,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-11 23:56:08,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:56:08,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:56:08,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-11 23:56:08,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:56:08,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:56:08,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:56:08,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:56:08,879 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:56:08,881 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:56:08,911 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:56:09,990 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-11 23:56:09,991 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-11 23:56:09,992 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:56:10,001 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:56:10,001 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-11 23:56:10,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:56:10 BoogieIcfgContainer [2022-07-11 23:56:10,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:56:10,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:56:10,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:56:10,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:56:10,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:56:08" (1/3) ... [2022-07-11 23:56:10,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565921d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:56:10, skipping insertion in model container [2022-07-11 23:56:10,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:56:08" (2/3) ... [2022-07-11 23:56:10,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565921d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:56:10, skipping insertion in model container [2022-07-11 23:56:10,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:56:10" (3/3) ... [2022-07-11 23:56:10,011 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.15.i.cil-2.c [2022-07-11 23:56:10,021 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:56:10,022 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:56:10,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:56:10,070 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@74455f9b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1468a674 [2022-07-11 23:56:10,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:56:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 152 states have (on average 1.7236842105263157) internal successors, (262), 153 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:10,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-11 23:56:10,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:10,081 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] [2022-07-11 23:56:10,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash 983008807, now seen corresponding path program 1 times [2022-07-11 23:56:10,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:10,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748534141] [2022-07-11 23:56:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:10,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:10,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:10,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748534141] [2022-07-11 23:56:10,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748534141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:10,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:10,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:10,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052908876] [2022-07-11 23:56:10,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:10,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:10,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:10,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:10,574 INFO L87 Difference]: Start difference. First operand has 154 states, 152 states have (on average 1.7236842105263157) internal successors, (262), 153 states have internal predecessors, (262), 0 states have call successors, (0), 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) [2022-07-11 23:56:11,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:11,500 INFO L93 Difference]: Finished difference Result 431 states and 736 transitions. [2022-07-11 23:56:11,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:11,502 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 [2022-07-11 23:56:11,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:11,510 INFO L225 Difference]: With dead ends: 431 [2022-07-11 23:56:11,510 INFO L226 Difference]: Without dead ends: 262 [2022-07-11 23:56:11,512 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 [2022-07-11 23:56:11,514 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 160 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:11,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 465 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 23:56:11,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-11 23:56:11,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 181. [2022-07-11 23:56:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.6166666666666667) internal successors, (291), 180 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 291 transitions. [2022-07-11 23:56:11,547 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 291 transitions. Word has length 46 [2022-07-11 23:56:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:11,548 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 291 transitions. [2022-07-11 23:56:11,548 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) [2022-07-11 23:56:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 291 transitions. [2022-07-11 23:56:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 23:56:11,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:11,550 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] [2022-07-11 23:56:11,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:56:11,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:11,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:11,551 INFO L85 PathProgramCache]: Analyzing trace with hash -829195320, now seen corresponding path program 1 times [2022-07-11 23:56:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:11,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710923962] [2022-07-11 23:56:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:11,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:11,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:11,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710923962] [2022-07-11 23:56:11,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710923962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:11,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:11,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:11,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610550971] [2022-07-11 23:56:11,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:11,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:11,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:11,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:11,719 INFO L87 Difference]: Start difference. First operand 181 states and 291 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) [2022-07-11 23:56:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:12,173 INFO L93 Difference]: Finished difference Result 380 states and 609 transitions. [2022-07-11 23:56:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:12,174 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 [2022-07-11 23:56:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:12,175 INFO L225 Difference]: With dead ends: 380 [2022-07-11 23:56:12,175 INFO L226 Difference]: Without dead ends: 209 [2022-07-11 23:56:12,176 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 [2022-07-11 23:56:12,177 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 22 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:12,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 493 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:56:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-11 23:56:12,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 192. [2022-07-11 23:56:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.6230366492146597) internal successors, (310), 191 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 310 transitions. [2022-07-11 23:56:12,195 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 310 transitions. Word has length 47 [2022-07-11 23:56:12,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:12,195 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 310 transitions. [2022-07-11 23:56:12,195 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) [2022-07-11 23:56:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 310 transitions. [2022-07-11 23:56:12,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:56:12,197 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:12,197 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] [2022-07-11 23:56:12,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:56:12,197 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:12,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:12,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1049124123, now seen corresponding path program 1 times [2022-07-11 23:56:12,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:12,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638574629] [2022-07-11 23:56:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:12,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:12,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:12,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638574629] [2022-07-11 23:56:12,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638574629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:12,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:12,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:12,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736391839] [2022-07-11 23:56:12,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:12,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:12,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:12,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:12,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:12,347 INFO L87 Difference]: Start difference. First operand 192 states and 310 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) [2022-07-11 23:56:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:12,913 INFO L93 Difference]: Finished difference Result 522 states and 847 transitions. [2022-07-11 23:56:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:12,913 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 [2022-07-11 23:56:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:12,915 INFO L225 Difference]: With dead ends: 522 [2022-07-11 23:56:12,915 INFO L226 Difference]: Without dead ends: 351 [2022-07-11 23:56:12,916 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 [2022-07-11 23:56:12,917 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 149 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:12,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 650 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:56:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-11 23:56:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-07-11 23:56:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.6188340807174888) internal successors, (361), 223 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) [2022-07-11 23:56:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 361 transitions. [2022-07-11 23:56:12,928 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 361 transitions. Word has length 60 [2022-07-11 23:56:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:12,928 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 361 transitions. [2022-07-11 23:56:12,928 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) [2022-07-11 23:56:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 361 transitions. [2022-07-11 23:56:12,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 23:56:12,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:12,930 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] [2022-07-11 23:56:12,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 23:56:12,930 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:12,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1463598922, now seen corresponding path program 1 times [2022-07-11 23:56:12,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:12,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125986441] [2022-07-11 23:56:12,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:12,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:13,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:13,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125986441] [2022-07-11 23:56:13,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125986441] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:13,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:13,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:13,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145718569] [2022-07-11 23:56:13,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:13,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:13,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:13,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:13,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:13,045 INFO L87 Difference]: Start difference. First operand 224 states and 361 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) [2022-07-11 23:56:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:13,384 INFO L93 Difference]: Finished difference Result 443 states and 710 transitions. [2022-07-11 23:56:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:13,385 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 [2022-07-11 23:56:13,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:13,386 INFO L225 Difference]: With dead ends: 443 [2022-07-11 23:56:13,386 INFO L226 Difference]: Without dead ends: 240 [2022-07-11 23:56:13,387 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 [2022-07-11 23:56:13,387 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 28 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:13,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 497 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:56:13,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-11 23:56:13,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2022-07-11 23:56:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.6143497757847534) internal successors, (360), 223 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 360 transitions. [2022-07-11 23:56:13,396 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 360 transitions. Word has length 61 [2022-07-11 23:56:13,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:13,396 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 360 transitions. [2022-07-11 23:56:13,396 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) [2022-07-11 23:56:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 360 transitions. [2022-07-11 23:56:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 23:56:13,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:13,398 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] [2022-07-11 23:56:13,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 23:56:13,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:13,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:13,399 INFO L85 PathProgramCache]: Analyzing trace with hash -625588150, now seen corresponding path program 1 times [2022-07-11 23:56:13,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:13,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875269710] [2022-07-11 23:56:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:13,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:13,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875269710] [2022-07-11 23:56:13,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875269710] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:13,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:13,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975320512] [2022-07-11 23:56:13,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:13,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:13,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:13,466 INFO L87 Difference]: Start difference. First operand 224 states and 360 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) [2022-07-11 23:56:13,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:13,804 INFO L93 Difference]: Finished difference Result 443 states and 709 transitions. [2022-07-11 23:56:13,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:13,805 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 [2022-07-11 23:56:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:13,805 INFO L225 Difference]: With dead ends: 443 [2022-07-11 23:56:13,805 INFO L226 Difference]: Without dead ends: 240 [2022-07-11 23:56:13,806 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 [2022-07-11 23:56:13,806 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 26 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:13,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 497 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:56:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-11 23:56:13,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2022-07-11 23:56:13,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.609865470852018) internal successors, (359), 223 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:13,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 359 transitions. [2022-07-11 23:56:13,812 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 359 transitions. Word has length 61 [2022-07-11 23:56:13,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:13,812 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 359 transitions. [2022-07-11 23:56:13,812 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) [2022-07-11 23:56:13,812 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 359 transitions. [2022-07-11 23:56:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 23:56:13,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:13,813 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] [2022-07-11 23:56:13,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 23:56:13,813 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:13,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:13,814 INFO L85 PathProgramCache]: Analyzing trace with hash 828942689, now seen corresponding path program 1 times [2022-07-11 23:56:13,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:13,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711266546] [2022-07-11 23:56:13,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:13,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:13,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:13,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:13,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711266546] [2022-07-11 23:56:13,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711266546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:13,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:13,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:13,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958024264] [2022-07-11 23:56:13,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:13,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:13,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:13,906 INFO L87 Difference]: Start difference. First operand 224 states and 359 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) [2022-07-11 23:56:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:14,290 INFO L93 Difference]: Finished difference Result 442 states and 707 transitions. [2022-07-11 23:56:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:14,290 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 [2022-07-11 23:56:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:14,291 INFO L225 Difference]: With dead ends: 442 [2022-07-11 23:56:14,291 INFO L226 Difference]: Without dead ends: 239 [2022-07-11 23:56:14,292 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 [2022-07-11 23:56:14,292 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 19 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:14,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 499 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:56:14,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-11 23:56:14,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 224. [2022-07-11 23:56:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.6053811659192825) internal successors, (358), 223 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 358 transitions. [2022-07-11 23:56:14,297 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 358 transitions. Word has length 61 [2022-07-11 23:56:14,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:14,297 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 358 transitions. [2022-07-11 23:56:14,298 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) [2022-07-11 23:56:14,298 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 358 transitions. [2022-07-11 23:56:14,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 23:56:14,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:14,299 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] [2022-07-11 23:56:14,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 23:56:14,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash -120405471, now seen corresponding path program 1 times [2022-07-11 23:56:14,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:14,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913800750] [2022-07-11 23:56:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:14,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:14,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913800750] [2022-07-11 23:56:14,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913800750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:14,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:14,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:14,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558736831] [2022-07-11 23:56:14,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:14,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:14,376 INFO L87 Difference]: Start difference. First operand 224 states and 358 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) [2022-07-11 23:56:14,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:14,903 INFO L93 Difference]: Finished difference Result 531 states and 848 transitions. [2022-07-11 23:56:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:14,903 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 [2022-07-11 23:56:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:14,905 INFO L225 Difference]: With dead ends: 531 [2022-07-11 23:56:14,905 INFO L226 Difference]: Without dead ends: 328 [2022-07-11 23:56:14,905 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 [2022-07-11 23:56:14,905 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 148 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:14,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 356 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:56:14,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-07-11 23:56:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 225. [2022-07-11 23:56:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.59375) internal successors, (357), 224 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 357 transitions. [2022-07-11 23:56:14,910 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 357 transitions. Word has length 61 [2022-07-11 23:56:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:14,911 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 357 transitions. [2022-07-11 23:56:14,911 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) [2022-07-11 23:56:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 357 transitions. [2022-07-11 23:56:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-11 23:56:14,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:14,912 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] [2022-07-11 23:56:14,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:56:14,912 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:14,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:14,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2112722766, now seen corresponding path program 1 times [2022-07-11 23:56:14,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:14,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757326183] [2022-07-11 23:56:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:14,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:14,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:15,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:15,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757326183] [2022-07-11 23:56:15,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757326183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:15,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:15,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:15,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732184867] [2022-07-11 23:56:15,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:15,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:15,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:15,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:15,009 INFO L87 Difference]: Start difference. First operand 225 states and 357 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) [2022-07-11 23:56:15,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:15,710 INFO L93 Difference]: Finished difference Result 442 states and 703 transitions. [2022-07-11 23:56:15,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:15,711 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 [2022-07-11 23:56:15,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:15,712 INFO L225 Difference]: With dead ends: 442 [2022-07-11 23:56:15,712 INFO L226 Difference]: Without dead ends: 238 [2022-07-11 23:56:15,712 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 [2022-07-11 23:56:15,713 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 22 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:15,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 503 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:56:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-11 23:56:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 225. [2022-07-11 23:56:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5892857142857142) internal successors, (356), 224 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 356 transitions. [2022-07-11 23:56:15,719 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 356 transitions. Word has length 62 [2022-07-11 23:56:15,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:15,720 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 356 transitions. [2022-07-11 23:56:15,721 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) [2022-07-11 23:56:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 356 transitions. [2022-07-11 23:56:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-11 23:56:15,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:15,722 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] [2022-07-11 23:56:15,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-11 23:56:15,722 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:15,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:15,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1062218447, now seen corresponding path program 1 times [2022-07-11 23:56:15,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:15,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019928404] [2022-07-11 23:56:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:15,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:15,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:15,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019928404] [2022-07-11 23:56:15,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019928404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:15,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:15,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:15,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398767542] [2022-07-11 23:56:15,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:15,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:15,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:15,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:15,809 INFO L87 Difference]: Start difference. First operand 225 states and 356 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) [2022-07-11 23:56:16,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:16,187 INFO L93 Difference]: Finished difference Result 442 states and 702 transitions. [2022-07-11 23:56:16,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:16,187 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 [2022-07-11 23:56:16,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:16,188 INFO L225 Difference]: With dead ends: 442 [2022-07-11 23:56:16,188 INFO L226 Difference]: Without dead ends: 238 [2022-07-11 23:56:16,188 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 [2022-07-11 23:56:16,189 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 20 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:16,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 503 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:56:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-11 23:56:16,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 225. [2022-07-11 23:56:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5848214285714286) internal successors, (355), 224 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 355 transitions. [2022-07-11 23:56:16,193 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 355 transitions. Word has length 63 [2022-07-11 23:56:16,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:16,193 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 355 transitions. [2022-07-11 23:56:16,193 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) [2022-07-11 23:56:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 355 transitions. [2022-07-11 23:56:16,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 23:56:16,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:16,194 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] [2022-07-11 23:56:16,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:56:16,194 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1477441165, now seen corresponding path program 1 times [2022-07-11 23:56:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:16,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608261059] [2022-07-11 23:56:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:16,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:16,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:16,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608261059] [2022-07-11 23:56:16,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608261059] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:16,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:16,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:16,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779724643] [2022-07-11 23:56:16,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:16,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:16,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:16,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:16,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:16,300 INFO L87 Difference]: Start difference. First operand 225 states and 355 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) [2022-07-11 23:56:16,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:16,954 INFO L93 Difference]: Finished difference Result 432 states and 688 transitions. [2022-07-11 23:56:16,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:16,955 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 [2022-07-11 23:56:16,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:16,957 INFO L225 Difference]: With dead ends: 432 [2022-07-11 23:56:16,957 INFO L226 Difference]: Without dead ends: 228 [2022-07-11 23:56:16,957 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 [2022-07-11 23:56:16,958 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 11 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:16,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 517 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:56:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-11 23:56:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2022-07-11 23:56:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5803571428571428) internal successors, (354), 224 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 354 transitions. [2022-07-11 23:56:16,962 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 354 transitions. Word has length 64 [2022-07-11 23:56:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:16,962 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 354 transitions. [2022-07-11 23:56:16,962 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) [2022-07-11 23:56:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 354 transitions. [2022-07-11 23:56:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 23:56:16,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:16,963 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] [2022-07-11 23:56:16,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:56:16,963 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:16,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1077289765, now seen corresponding path program 1 times [2022-07-11 23:56:16,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:16,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736538410] [2022-07-11 23:56:16,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:16,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:17,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:17,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736538410] [2022-07-11 23:56:17,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736538410] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:17,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:17,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:17,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538813642] [2022-07-11 23:56:17,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:17,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:17,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:17,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:17,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:17,041 INFO L87 Difference]: Start difference. First operand 225 states and 354 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) [2022-07-11 23:56:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:17,730 INFO L93 Difference]: Finished difference Result 532 states and 842 transitions. [2022-07-11 23:56:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:17,731 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 [2022-07-11 23:56:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:17,732 INFO L225 Difference]: With dead ends: 532 [2022-07-11 23:56:17,732 INFO L226 Difference]: Without dead ends: 328 [2022-07-11 23:56:17,732 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 [2022-07-11 23:56:17,733 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 125 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:17,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 382 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:56:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-07-11 23:56:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 248. [2022-07-11 23:56:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.6153846153846154) internal successors, (399), 247 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 399 transitions. [2022-07-11 23:56:17,737 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 399 transitions. Word has length 64 [2022-07-11 23:56:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:17,738 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 399 transitions. [2022-07-11 23:56:17,738 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) [2022-07-11 23:56:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 399 transitions. [2022-07-11 23:56:17,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-11 23:56:17,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:17,738 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-11 23:56:17,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 23:56:17,739 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:17,739 INFO L85 PathProgramCache]: Analyzing trace with hash -212151294, now seen corresponding path program 1 times [2022-07-11 23:56:17,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:17,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554266295] [2022-07-11 23:56:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:17,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:17,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:17,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554266295] [2022-07-11 23:56:17,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554266295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:17,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:17,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:17,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982943376] [2022-07-11 23:56:17,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:17,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:17,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:17,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:17,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:17,827 INFO L87 Difference]: Start difference. First operand 248 states and 399 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:18,998 INFO L93 Difference]: Finished difference Result 631 states and 1024 transitions. [2022-07-11 23:56:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:18,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-11 23:56:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:19,000 INFO L225 Difference]: With dead ends: 631 [2022-07-11 23:56:19,000 INFO L226 Difference]: Without dead ends: 404 [2022-07-11 23:56:19,000 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 [2022-07-11 23:56:19,001 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 131 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:19,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 366 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-11 23:56:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-07-11 23:56:19,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 312. [2022-07-11 23:56:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 1.6430868167202572) internal successors, (511), 311 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:19,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 511 transitions. [2022-07-11 23:56:19,008 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 511 transitions. Word has length 92 [2022-07-11 23:56:19,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:19,009 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 511 transitions. [2022-07-11 23:56:19,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:19,009 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 511 transitions. [2022-07-11 23:56:19,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-11 23:56:19,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:19,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-07-11 23:56:19,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-11 23:56:19,010 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:19,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:19,011 INFO L85 PathProgramCache]: Analyzing trace with hash -445450899, now seen corresponding path program 1 times [2022-07-11 23:56:19,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:19,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203088932] [2022-07-11 23:56:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:19,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:56:19,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:19,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203088932] [2022-07-11 23:56:19,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203088932] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:19,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:19,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:19,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257509378] [2022-07-11 23:56:19,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:19,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:19,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:19,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:19,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:19,102 INFO L87 Difference]: Start difference. First operand 312 states and 511 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:19,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:19,906 INFO L93 Difference]: Finished difference Result 723 states and 1180 transitions. [2022-07-11 23:56:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:19,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-07-11 23:56:19,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:19,907 INFO L225 Difference]: With dead ends: 723 [2022-07-11 23:56:19,907 INFO L226 Difference]: Without dead ends: 432 [2022-07-11 23:56:19,908 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 [2022-07-11 23:56:19,908 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 127 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:19,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 354 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:56:19,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-07-11 23:56:19,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 349. [2022-07-11 23:56:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.6522988505747127) internal successors, (575), 348 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 575 transitions. [2022-07-11 23:56:19,914 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 575 transitions. Word has length 97 [2022-07-11 23:56:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:19,914 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 575 transitions. [2022-07-11 23:56:19,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:19,914 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 575 transitions. [2022-07-11 23:56:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-11 23:56:19,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:19,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2022-07-11 23:56:19,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 23:56:19,916 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:19,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1163497164, now seen corresponding path program 1 times [2022-07-11 23:56:19,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:19,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064347520] [2022-07-11 23:56:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:19,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 23:56:20,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:20,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064347520] [2022-07-11 23:56:20,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064347520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:20,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:20,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:20,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244157963] [2022-07-11 23:56:20,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:20,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:20,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:20,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:20,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:20,016 INFO L87 Difference]: Start difference. First operand 349 states and 575 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:20,592 INFO L93 Difference]: Finished difference Result 718 states and 1187 transitions. [2022-07-11 23:56:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:20,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-07-11 23:56:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:20,594 INFO L225 Difference]: With dead ends: 718 [2022-07-11 23:56:20,594 INFO L226 Difference]: Without dead ends: 390 [2022-07-11 23:56:20,595 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 [2022-07-11 23:56:20,595 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 32 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:20,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 519 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:56:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-11 23:56:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 371. [2022-07-11 23:56:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6513513513513514) internal successors, (611), 370 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:20,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 611 transitions. [2022-07-11 23:56:20,602 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 611 transitions. Word has length 98 [2022-07-11 23:56:20,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:20,602 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 611 transitions. [2022-07-11 23:56:20,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:20,602 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 611 transitions. [2022-07-11 23:56:20,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-11 23:56:20,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:20,603 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-07-11 23:56:20,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-11 23:56:20,603 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:20,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:20,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2059005282, now seen corresponding path program 1 times [2022-07-11 23:56:20,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:20,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921771943] [2022-07-11 23:56:20,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:20,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:20,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:20,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921771943] [2022-07-11 23:56:20,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921771943] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:20,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:20,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:20,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180955078] [2022-07-11 23:56:20,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:20,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:20,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:20,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:20,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:20,674 INFO L87 Difference]: Start difference. First operand 371 states and 611 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) [2022-07-11 23:56:22,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:22,334 INFO L93 Difference]: Finished difference Result 739 states and 1221 transitions. [2022-07-11 23:56:22,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:22,335 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 112 [2022-07-11 23:56:22,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:22,337 INFO L225 Difference]: With dead ends: 739 [2022-07-11 23:56:22,337 INFO L226 Difference]: Without dead ends: 389 [2022-07-11 23:56:22,337 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 [2022-07-11 23:56:22,338 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 42 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:22,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 521 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:56:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-11 23:56:22,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 371. [2022-07-11 23:56:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6486486486486487) internal successors, (610), 370 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 610 transitions. [2022-07-11 23:56:22,347 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 610 transitions. Word has length 112 [2022-07-11 23:56:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:22,347 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 610 transitions. [2022-07-11 23:56:22,347 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) [2022-07-11 23:56:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 610 transitions. [2022-07-11 23:56:22,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-11 23:56:22,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:22,349 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-07-11 23:56:22,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-11 23:56:22,349 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:22,350 INFO L85 PathProgramCache]: Analyzing trace with hash -763752458, now seen corresponding path program 1 times [2022-07-11 23:56:22,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:22,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231050759] [2022-07-11 23:56:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:22,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:22,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:22,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231050759] [2022-07-11 23:56:22,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231050759] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:22,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:22,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:22,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237665735] [2022-07-11 23:56:22,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:22,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:22,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:22,437 INFO L87 Difference]: Start difference. First operand 371 states and 610 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) [2022-07-11 23:56:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:23,554 INFO L93 Difference]: Finished difference Result 801 states and 1308 transitions. [2022-07-11 23:56:23,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:23,554 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 112 [2022-07-11 23:56:23,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:23,556 INFO L225 Difference]: With dead ends: 801 [2022-07-11 23:56:23,556 INFO L226 Difference]: Without dead ends: 451 [2022-07-11 23:56:23,557 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 [2022-07-11 23:56:23,557 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 152 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:23,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 354 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:56:23,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-07-11 23:56:23,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 371. [2022-07-11 23:56:23,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6297297297297297) internal successors, (603), 370 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 603 transitions. [2022-07-11 23:56:23,565 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 603 transitions. Word has length 112 [2022-07-11 23:56:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:23,566 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 603 transitions. [2022-07-11 23:56:23,566 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) [2022-07-11 23:56:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 603 transitions. [2022-07-11 23:56:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-11 23:56:23,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:23,567 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 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] [2022-07-11 23:56:23,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-11 23:56:23,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:23,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1523411789, now seen corresponding path program 1 times [2022-07-11 23:56:23,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:23,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837848129] [2022-07-11 23:56:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:23,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:23,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:23,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837848129] [2022-07-11 23:56:23,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837848129] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:23,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:23,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:23,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002608294] [2022-07-11 23:56:23,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:23,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:23,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:23,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:23,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:23,654 INFO L87 Difference]: Start difference. First operand 371 states and 603 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) [2022-07-11 23:56:25,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:25,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:25,921 INFO L93 Difference]: Finished difference Result 738 states and 1204 transitions. [2022-07-11 23:56:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:25,922 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 112 [2022-07-11 23:56:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:25,923 INFO L225 Difference]: With dead ends: 738 [2022-07-11 23:56:25,923 INFO L226 Difference]: Without dead ends: 388 [2022-07-11 23:56:25,923 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 [2022-07-11 23:56:25,924 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 33 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:25,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 523 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:56:25,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-11 23:56:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 371. [2022-07-11 23:56:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.627027027027027) internal successors, (602), 370 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 602 transitions. [2022-07-11 23:56:25,929 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 602 transitions. Word has length 112 [2022-07-11 23:56:25,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:25,930 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 602 transitions. [2022-07-11 23:56:25,930 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) [2022-07-11 23:56:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 602 transitions. [2022-07-11 23:56:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-11 23:56:25,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:25,931 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-07-11 23:56:25,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-11 23:56:25,931 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:25,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1338827316, now seen corresponding path program 1 times [2022-07-11 23:56:25,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:25,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69482816] [2022-07-11 23:56:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:26,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:26,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69482816] [2022-07-11 23:56:26,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69482816] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:26,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:26,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:26,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88267917] [2022-07-11 23:56:26,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:26,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:26,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:26,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:26,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:26,029 INFO L87 Difference]: Start difference. First operand 371 states and 602 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) [2022-07-11 23:56:27,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:27,495 INFO L93 Difference]: Finished difference Result 738 states and 1202 transitions. [2022-07-11 23:56:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:27,495 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 113 [2022-07-11 23:56:27,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:27,496 INFO L225 Difference]: With dead ends: 738 [2022-07-11 23:56:27,496 INFO L226 Difference]: Without dead ends: 388 [2022-07-11 23:56:27,497 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 [2022-07-11 23:56:27,497 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 37 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:27,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 523 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-11 23:56:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-11 23:56:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 371. [2022-07-11 23:56:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6243243243243244) internal successors, (601), 370 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 601 transitions. [2022-07-11 23:56:27,504 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 601 transitions. Word has length 113 [2022-07-11 23:56:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:27,505 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 601 transitions. [2022-07-11 23:56:27,505 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) [2022-07-11 23:56:27,505 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 601 transitions. [2022-07-11 23:56:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-07-11 23:56:27,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:27,506 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-07-11 23:56:27,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-11 23:56:27,506 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:27,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:27,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1036019589, now seen corresponding path program 1 times [2022-07-11 23:56:27,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:27,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471030389] [2022-07-11 23:56:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:27,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:27,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:27,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471030389] [2022-07-11 23:56:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471030389] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:27,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:27,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126489663] [2022-07-11 23:56:27,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:27,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:27,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:27,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:27,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:27,607 INFO L87 Difference]: Start difference. First operand 371 states and 601 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:28,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:29,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:29,127 INFO L93 Difference]: Finished difference Result 738 states and 1200 transitions. [2022-07-11 23:56:29,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:29,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-07-11 23:56:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:29,128 INFO L225 Difference]: With dead ends: 738 [2022-07-11 23:56:29,128 INFO L226 Difference]: Without dead ends: 388 [2022-07-11 23:56:29,129 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 [2022-07-11 23:56:29,129 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 35 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:29,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 523 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-11 23:56:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-07-11 23:56:29,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 371. [2022-07-11 23:56:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6216216216216217) internal successors, (600), 370 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:29,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 600 transitions. [2022-07-11 23:56:29,135 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 600 transitions. Word has length 114 [2022-07-11 23:56:29,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:29,136 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 600 transitions. [2022-07-11 23:56:29,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:29,136 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 600 transitions. [2022-07-11 23:56:29,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-11 23:56:29,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:29,137 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-07-11 23:56:29,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-11 23:56:29,137 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash -477172775, now seen corresponding path program 1 times [2022-07-11 23:56:29,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:29,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303666851] [2022-07-11 23:56:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:29,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:56:29,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:29,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303666851] [2022-07-11 23:56:29,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303666851] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:29,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:29,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:29,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197921602] [2022-07-11 23:56:29,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:29,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:29,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:29,268 INFO L87 Difference]: Start difference. First operand 371 states and 600 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:29,636 INFO L93 Difference]: Finished difference Result 728 states and 1185 transitions. [2022-07-11 23:56:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2022-07-11 23:56:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:29,638 INFO L225 Difference]: With dead ends: 728 [2022-07-11 23:56:29,638 INFO L226 Difference]: Without dead ends: 378 [2022-07-11 23:56:29,639 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 [2022-07-11 23:56:29,639 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 26 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:29,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 537 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:56:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-11 23:56:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 371. [2022-07-11 23:56:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.6189189189189188) internal successors, (599), 370 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 599 transitions. [2022-07-11 23:56:29,645 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 599 transitions. Word has length 115 [2022-07-11 23:56:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:29,646 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 599 transitions. [2022-07-11 23:56:29,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 599 transitions. [2022-07-11 23:56:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-11 23:56:29,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:29,647 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] [2022-07-11 23:56:29,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-11 23:56:29,647 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1048591620, now seen corresponding path program 1 times [2022-07-11 23:56:29,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:29,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658840270] [2022-07-11 23:56:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:29,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:56:29,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:29,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658840270] [2022-07-11 23:56:29,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658840270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:29,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:29,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:29,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708450379] [2022-07-11 23:56:29,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:29,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:29,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:29,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:29,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:29,722 INFO L87 Difference]: Start difference. First operand 371 states and 599 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) [2022-07-11 23:56:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:30,850 INFO L93 Difference]: Finished difference Result 815 states and 1316 transitions. [2022-07-11 23:56:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:30,851 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 [2022-07-11 23:56:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:30,852 INFO L225 Difference]: With dead ends: 815 [2022-07-11 23:56:30,852 INFO L226 Difference]: Without dead ends: 465 [2022-07-11 23:56:30,853 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 [2022-07-11 23:56:30,853 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 82 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:30,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 485 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:56:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-07-11 23:56:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 411. [2022-07-11 23:56:30,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.6243902439024391) internal successors, (666), 410 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:30,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 666 transitions. [2022-07-11 23:56:30,860 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 666 transitions. Word has length 120 [2022-07-11 23:56:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:30,860 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 666 transitions. [2022-07-11 23:56:30,860 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) [2022-07-11 23:56:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 666 transitions. [2022-07-11 23:56:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-11 23:56:30,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:30,861 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] [2022-07-11 23:56:30,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-11 23:56:30,862 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:30,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:30,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1021526018, now seen corresponding path program 1 times [2022-07-11 23:56:30,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:30,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873706254] [2022-07-11 23:56:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:30,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:56:30,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:30,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873706254] [2022-07-11 23:56:30,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873706254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:30,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:30,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:30,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4353783] [2022-07-11 23:56:30,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:30,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:30,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:30,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:30,961 INFO L87 Difference]: Start difference. First operand 411 states and 666 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:32,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:32,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:32,766 INFO L93 Difference]: Finished difference Result 848 states and 1377 transitions. [2022-07-11 23:56:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-11 23:56:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:32,768 INFO L225 Difference]: With dead ends: 848 [2022-07-11 23:56:32,768 INFO L226 Difference]: Without dead ends: 458 [2022-07-11 23:56:32,768 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 [2022-07-11 23:56:32,769 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 37 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:32,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 617 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-11 23:56:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-07-11 23:56:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 435. [2022-07-11 23:56:32,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.6244239631336406) internal successors, (705), 434 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:32,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 705 transitions. [2022-07-11 23:56:32,775 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 705 transitions. Word has length 120 [2022-07-11 23:56:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:32,775 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 705 transitions. [2022-07-11 23:56:32,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:32,776 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 705 transitions. [2022-07-11 23:56:32,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-11 23:56:32,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:32,777 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] [2022-07-11 23:56:32,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-11 23:56:32,777 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash -909602799, now seen corresponding path program 1 times [2022-07-11 23:56:32,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:32,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352001074] [2022-07-11 23:56:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:56:32,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:32,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352001074] [2022-07-11 23:56:32,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352001074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:32,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:32,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:32,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842151902] [2022-07-11 23:56:32,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:32,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:32,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:32,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:32,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:32,853 INFO L87 Difference]: Start difference. First operand 435 states and 705 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) [2022-07-11 23:56:33,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:33,427 INFO L93 Difference]: Finished difference Result 894 states and 1445 transitions. [2022-07-11 23:56:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:33,427 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 [2022-07-11 23:56:33,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:33,428 INFO L225 Difference]: With dead ends: 894 [2022-07-11 23:56:33,428 INFO L226 Difference]: Without dead ends: 480 [2022-07-11 23:56:33,429 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 [2022-07-11 23:56:33,429 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 64 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:33,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 491 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:56:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-07-11 23:56:33,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 438. [2022-07-11 23:56:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.620137299771167) internal successors, (708), 437 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 708 transitions. [2022-07-11 23:56:33,436 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 708 transitions. Word has length 128 [2022-07-11 23:56:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:33,436 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 708 transitions. [2022-07-11 23:56:33,436 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) [2022-07-11 23:56:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 708 transitions. [2022-07-11 23:56:33,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-11 23:56:33,437 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:33,437 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:56:33,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-11 23:56:33,438 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:33,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:33,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1310949078, now seen corresponding path program 1 times [2022-07-11 23:56:33,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:33,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569998897] [2022-07-11 23:56:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:33,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:33,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:33,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569998897] [2022-07-11 23:56:33,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569998897] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:33,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:33,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:33,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211568541] [2022-07-11 23:56:33,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:33,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:33,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:33,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:33,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:33,535 INFO L87 Difference]: Start difference. First operand 438 states and 708 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:34,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:34,964 INFO L93 Difference]: Finished difference Result 934 states and 1503 transitions. [2022-07-11 23:56:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:34,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-07-11 23:56:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:34,976 INFO L225 Difference]: With dead ends: 934 [2022-07-11 23:56:34,976 INFO L226 Difference]: Without dead ends: 517 [2022-07-11 23:56:34,977 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 [2022-07-11 23:56:34,978 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 152 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:34,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 356 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-11 23:56:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-07-11 23:56:34,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 438. [2022-07-11 23:56:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.6018306636155606) internal successors, (700), 437 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:34,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 700 transitions. [2022-07-11 23:56:34,984 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 700 transitions. Word has length 134 [2022-07-11 23:56:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:34,984 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 700 transitions. [2022-07-11 23:56:34,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:34,984 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 700 transitions. [2022-07-11 23:56:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-11 23:56:34,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:34,985 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] [2022-07-11 23:56:34,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-11 23:56:34,985 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1846542571, now seen corresponding path program 1 times [2022-07-11 23:56:34,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:34,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064827882] [2022-07-11 23:56:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:34,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:35,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:35,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064827882] [2022-07-11 23:56:35,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064827882] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:35,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:35,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:35,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947311022] [2022-07-11 23:56:35,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:35,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:35,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:35,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:35,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:35,086 INFO L87 Difference]: Start difference. First operand 438 states and 700 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:35,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:35,552 INFO L93 Difference]: Finished difference Result 933 states and 1486 transitions. [2022-07-11 23:56:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-07-11 23:56:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:35,554 INFO L225 Difference]: With dead ends: 933 [2022-07-11 23:56:35,554 INFO L226 Difference]: Without dead ends: 516 [2022-07-11 23:56:35,554 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 [2022-07-11 23:56:35,555 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 144 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:35,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 358 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:56:35,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-07-11 23:56:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 438. [2022-07-11 23:56:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 1.585812356979405) internal successors, (693), 437 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 693 transitions. [2022-07-11 23:56:35,568 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 693 transitions. Word has length 134 [2022-07-11 23:56:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:35,568 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 693 transitions. [2022-07-11 23:56:35,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 693 transitions. [2022-07-11 23:56:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-11 23:56:35,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:35,570 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2022-07-11 23:56:35,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-11 23:56:35,571 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:35,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:35,571 INFO L85 PathProgramCache]: Analyzing trace with hash -50542740, now seen corresponding path program 1 times [2022-07-11 23:56:35,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:35,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012701037] [2022-07-11 23:56:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:35,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 23:56:35,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:35,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012701037] [2022-07-11 23:56:35,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012701037] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:35,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:35,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:56:35,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008862928] [2022-07-11 23:56:35,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:35,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:56:35,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:35,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:56:35,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:56:35,685 INFO L87 Difference]: Start difference. First operand 438 states and 693 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:37,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:38,033 INFO L93 Difference]: Finished difference Result 865 states and 1374 transitions. [2022-07-11 23:56:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:56:38,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2022-07-11 23:56:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:38,035 INFO L225 Difference]: With dead ends: 865 [2022-07-11 23:56:38,035 INFO L226 Difference]: Without dead ends: 448 [2022-07-11 23:56:38,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:56:38,036 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 153 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:38,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 384 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:56:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-07-11 23:56:38,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 447. [2022-07-11 23:56:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5784753363228698) internal successors, (704), 446 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 704 transitions. [2022-07-11 23:56:38,042 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 704 transitions. Word has length 135 [2022-07-11 23:56:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:38,042 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 704 transitions. [2022-07-11 23:56:38,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 704 transitions. [2022-07-11 23:56:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-11 23:56:38,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:38,043 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2022-07-11 23:56:38,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-11 23:56:38,044 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:38,044 INFO L85 PathProgramCache]: Analyzing trace with hash 181553585, now seen corresponding path program 1 times [2022-07-11 23:56:38,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:38,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349904542] [2022-07-11 23:56:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:38,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:38,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:38,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349904542] [2022-07-11 23:56:38,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349904542] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:38,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:38,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:38,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694422407] [2022-07-11 23:56:38,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:38,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:38,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:38,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:38,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:38,149 INFO L87 Difference]: Start difference. First operand 447 states and 704 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:38,851 INFO L93 Difference]: Finished difference Result 913 states and 1436 transitions. [2022-07-11 23:56:38,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:38,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 136 [2022-07-11 23:56:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:38,853 INFO L225 Difference]: With dead ends: 913 [2022-07-11 23:56:38,853 INFO L226 Difference]: Without dead ends: 487 [2022-07-11 23:56:38,865 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 [2022-07-11 23:56:38,865 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 89 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:38,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 521 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:56:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-07-11 23:56:38,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 447. [2022-07-11 23:56:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5762331838565022) internal successors, (703), 446 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 703 transitions. [2022-07-11 23:56:38,877 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 703 transitions. Word has length 136 [2022-07-11 23:56:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:38,877 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 703 transitions. [2022-07-11 23:56:38,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 703 transitions. [2022-07-11 23:56:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-11 23:56:38,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:38,879 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2022-07-11 23:56:38,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-11 23:56:38,879 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:38,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:38,880 INFO L85 PathProgramCache]: Analyzing trace with hash -701955405, now seen corresponding path program 1 times [2022-07-11 23:56:38,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:38,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497889361] [2022-07-11 23:56:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:38,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:38,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:38,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497889361] [2022-07-11 23:56:38,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497889361] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:38,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:38,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:38,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146655991] [2022-07-11 23:56:38,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:38,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:38,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:38,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:38,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:38,985 INFO L87 Difference]: Start difference. First operand 447 states and 703 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:40,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:40,688 INFO L93 Difference]: Finished difference Result 894 states and 1408 transitions. [2022-07-11 23:56:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:40,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 136 [2022-07-11 23:56:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:40,690 INFO L225 Difference]: With dead ends: 894 [2022-07-11 23:56:40,690 INFO L226 Difference]: Without dead ends: 468 [2022-07-11 23:56:40,691 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 [2022-07-11 23:56:40,691 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 45 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:40,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 613 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-11 23:56:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-07-11 23:56:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 447. [2022-07-11 23:56:40,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5739910313901346) internal successors, (702), 446 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:40,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 702 transitions. [2022-07-11 23:56:40,698 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 702 transitions. Word has length 136 [2022-07-11 23:56:40,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:40,699 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 702 transitions. [2022-07-11 23:56:40,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:40,699 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 702 transitions. [2022-07-11 23:56:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-11 23:56:40,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:40,700 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 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] [2022-07-11 23:56:40,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-11 23:56:40,700 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:40,701 INFO L85 PathProgramCache]: Analyzing trace with hash 246747578, now seen corresponding path program 1 times [2022-07-11 23:56:40,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:40,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867537003] [2022-07-11 23:56:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:40,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:40,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:40,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867537003] [2022-07-11 23:56:40,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867537003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:40,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:40,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:40,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59819145] [2022-07-11 23:56:40,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:40,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:40,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:40,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:40,779 INFO L87 Difference]: Start difference. First operand 447 states and 702 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:42,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:42,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:42,569 INFO L93 Difference]: Finished difference Result 951 states and 1489 transitions. [2022-07-11 23:56:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:42,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 137 [2022-07-11 23:56:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:42,571 INFO L225 Difference]: With dead ends: 951 [2022-07-11 23:56:42,571 INFO L226 Difference]: Without dead ends: 525 [2022-07-11 23:56:42,572 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 [2022-07-11 23:56:42,575 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 147 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:42,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 366 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-11 23:56:42,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-11 23:56:42,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 447. [2022-07-11 23:56:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5560538116591929) internal successors, (694), 446 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:42,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 694 transitions. [2022-07-11 23:56:42,582 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 694 transitions. Word has length 137 [2022-07-11 23:56:42,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:42,582 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 694 transitions. [2022-07-11 23:56:42,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:42,582 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 694 transitions. [2022-07-11 23:56:42,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-07-11 23:56:42,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:42,583 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2022-07-11 23:56:42,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-11 23:56:42,583 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:42,584 INFO L85 PathProgramCache]: Analyzing trace with hash -282582356, now seen corresponding path program 1 times [2022-07-11 23:56:42,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:42,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533956130] [2022-07-11 23:56:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:42,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:42,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:42,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533956130] [2022-07-11 23:56:42,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533956130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:42,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:42,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:42,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173013105] [2022-07-11 23:56:42,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:42,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:42,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:42,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:42,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:42,668 INFO L87 Difference]: Start difference. First operand 447 states and 694 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:43,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:43,609 INFO L93 Difference]: Finished difference Result 951 states and 1473 transitions. [2022-07-11 23:56:43,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:43,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2022-07-11 23:56:43,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:43,611 INFO L225 Difference]: With dead ends: 951 [2022-07-11 23:56:43,611 INFO L226 Difference]: Without dead ends: 525 [2022-07-11 23:56:43,612 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 [2022-07-11 23:56:43,612 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 145 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:43,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 394 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 23:56:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-07-11 23:56:43,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 447. [2022-07-11 23:56:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5381165919282511) internal successors, (686), 446 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) [2022-07-11 23:56:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 686 transitions. [2022-07-11 23:56:43,619 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 686 transitions. Word has length 138 [2022-07-11 23:56:43,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:43,620 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 686 transitions. [2022-07-11 23:56:43,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:43,621 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 686 transitions. [2022-07-11 23:56:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-11 23:56:43,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:43,622 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] [2022-07-11 23:56:43,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-11 23:56:43,622 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:43,622 INFO L85 PathProgramCache]: Analyzing trace with hash -655242258, now seen corresponding path program 1 times [2022-07-11 23:56:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:43,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180147138] [2022-07-11 23:56:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:43,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:56:43,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180147138] [2022-07-11 23:56:43,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180147138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:43,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:43,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:43,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308251150] [2022-07-11 23:56:43,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:43,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:43,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:43,706 INFO L87 Difference]: Start difference. First operand 447 states and 686 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) [2022-07-11 23:56:45,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:46,001 INFO L93 Difference]: Finished difference Result 991 states and 1521 transitions. [2022-07-11 23:56:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:46,002 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 [2022-07-11 23:56:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:46,003 INFO L225 Difference]: With dead ends: 991 [2022-07-11 23:56:46,003 INFO L226 Difference]: Without dead ends: 565 [2022-07-11 23:56:46,003 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 [2022-07-11 23:56:46,004 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 129 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:46,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 366 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:56:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-07-11 23:56:46,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 477. [2022-07-11 23:56:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5294117647058822) internal successors, (728), 476 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:46,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 728 transitions. [2022-07-11 23:56:46,013 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 728 transitions. Word has length 141 [2022-07-11 23:56:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:46,013 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 728 transitions. [2022-07-11 23:56:46,013 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) [2022-07-11 23:56:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 728 transitions. [2022-07-11 23:56:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-11 23:56:46,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:46,014 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] [2022-07-11 23:56:46,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-11 23:56:46,015 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:46,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1461975096, now seen corresponding path program 1 times [2022-07-11 23:56:46,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:46,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584532924] [2022-07-11 23:56:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:46,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:56:46,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:46,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584532924] [2022-07-11 23:56:46,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584532924] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:46,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:46,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:46,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850510875] [2022-07-11 23:56:46,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:46,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:46,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:46,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:46,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:46,117 INFO L87 Difference]: Start difference. First operand 477 states and 728 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:46,817 INFO L93 Difference]: Finished difference Result 963 states and 1472 transitions. [2022-07-11 23:56:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:46,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 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 [2022-07-11 23:56:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:46,818 INFO L225 Difference]: With dead ends: 963 [2022-07-11 23:56:46,818 INFO L226 Difference]: Without dead ends: 507 [2022-07-11 23:56:46,819 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 [2022-07-11 23:56:46,819 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 67 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:46,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 521 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:56:46,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-07-11 23:56:46,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 477. [2022-07-11 23:56:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5273109243697478) internal successors, (727), 476 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 727 transitions. [2022-07-11 23:56:46,826 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 727 transitions. Word has length 142 [2022-07-11 23:56:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:46,827 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 727 transitions. [2022-07-11 23:56:46,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 727 transitions. [2022-07-11 23:56:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-11 23:56:46,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:46,828 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] [2022-07-11 23:56:46,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-11 23:56:46,828 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:46,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2035167520, now seen corresponding path program 1 times [2022-07-11 23:56:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:46,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510868727] [2022-07-11 23:56:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:46,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:56:46,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:46,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510868727] [2022-07-11 23:56:46,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510868727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:46,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:46,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:46,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902086443] [2022-07-11 23:56:46,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:46,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:46,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:46,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:46,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:46,907 INFO L87 Difference]: Start difference. First operand 477 states and 727 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) [2022-07-11 23:56:47,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:47,613 INFO L93 Difference]: Finished difference Result 961 states and 1468 transitions. [2022-07-11 23:56:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:47,613 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 [2022-07-11 23:56:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:47,614 INFO L225 Difference]: With dead ends: 961 [2022-07-11 23:56:47,614 INFO L226 Difference]: Without dead ends: 505 [2022-07-11 23:56:47,615 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 [2022-07-11 23:56:47,615 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 58 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 523 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 [2022-07-11 23:56:47,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 523 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:56:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-07-11 23:56:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 477. [2022-07-11 23:56:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5252100840336134) internal successors, (726), 476 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) [2022-07-11 23:56:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 726 transitions. [2022-07-11 23:56:47,622 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 726 transitions. Word has length 142 [2022-07-11 23:56:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:47,622 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 726 transitions. [2022-07-11 23:56:47,623 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) [2022-07-11 23:56:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 726 transitions. [2022-07-11 23:56:47,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-11 23:56:47,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:47,624 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] [2022-07-11 23:56:47,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-11 23:56:47,624 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:47,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1801951302, now seen corresponding path program 1 times [2022-07-11 23:56:47,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:47,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291401383] [2022-07-11 23:56:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:47,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-11 23:56:47,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:47,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291401383] [2022-07-11 23:56:47,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291401383] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:47,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:47,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768993545] [2022-07-11 23:56:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:47,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:47,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:47,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:47,720 INFO L87 Difference]: Start difference. First operand 477 states and 726 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:49,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:56:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:49,599 INFO L93 Difference]: Finished difference Result 1011 states and 1537 transitions. [2022-07-11 23:56:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:49,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 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 [2022-07-11 23:56:49,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:49,601 INFO L225 Difference]: With dead ends: 1011 [2022-07-11 23:56:49,601 INFO L226 Difference]: Without dead ends: 555 [2022-07-11 23:56:49,602 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 [2022-07-11 23:56:49,602 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 121 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:49,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 394 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-11 23:56:49,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-07-11 23:56:49,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 477. [2022-07-11 23:56:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5210084033613445) internal successors, (724), 476 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 724 transitions. [2022-07-11 23:56:49,610 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 724 transitions. Word has length 142 [2022-07-11 23:56:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:49,610 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 724 transitions. [2022-07-11 23:56:49,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 724 transitions. [2022-07-11 23:56:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-11 23:56:49,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:49,612 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, 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] [2022-07-11 23:56:49,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-11 23:56:49,612 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash -279960039, now seen corresponding path program 1 times [2022-07-11 23:56:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:49,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672613922] [2022-07-11 23:56:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:49,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:56:49,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:49,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672613922] [2022-07-11 23:56:49,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672613922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:49,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:49,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:49,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981480491] [2022-07-11 23:56:49,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:49,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:49,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:49,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:49,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:49,713 INFO L87 Difference]: Start difference. First operand 477 states and 724 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 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) [2022-07-11 23:56:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:50,439 INFO L93 Difference]: Finished difference Result 1051 states and 1595 transitions. [2022-07-11 23:56:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:50,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 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 144 [2022-07-11 23:56:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:50,441 INFO L225 Difference]: With dead ends: 1051 [2022-07-11 23:56:50,441 INFO L226 Difference]: Without dead ends: 595 [2022-07-11 23:56:50,442 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 [2022-07-11 23:56:50,442 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 130 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:50,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 394 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:56:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-07-11 23:56:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 505. [2022-07-11 23:56:50,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.5099206349206349) internal successors, (761), 504 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 761 transitions. [2022-07-11 23:56:50,450 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 761 transitions. Word has length 144 [2022-07-11 23:56:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:50,450 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 761 transitions. [2022-07-11 23:56:50,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 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) [2022-07-11 23:56:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 761 transitions. [2022-07-11 23:56:50,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-11 23:56:50,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:50,453 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, 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] [2022-07-11 23:56:50,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-11 23:56:50,453 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:50,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:50,454 INFO L85 PathProgramCache]: Analyzing trace with hash 504114503, now seen corresponding path program 1 times [2022-07-11 23:56:50,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:50,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977495412] [2022-07-11 23:56:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:50,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-11 23:56:50,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:50,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977495412] [2022-07-11 23:56:50,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977495412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:50,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:50,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:50,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982731456] [2022-07-11 23:56:50,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:50,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:50,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:50,544 INFO L87 Difference]: Start difference. First operand 505 states and 761 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:50,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:50,957 INFO L93 Difference]: Finished difference Result 1067 states and 1607 transitions. [2022-07-11 23:56:50,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:50,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 [2022-07-11 23:56:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:50,959 INFO L225 Difference]: With dead ends: 1067 [2022-07-11 23:56:50,959 INFO L226 Difference]: Without dead ends: 583 [2022-07-11 23:56:50,960 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 [2022-07-11 23:56:50,960 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 129 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:50,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 366 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:56:50,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-07-11 23:56:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 505. [2022-07-11 23:56:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.496031746031746) internal successors, (754), 504 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 754 transitions. [2022-07-11 23:56:50,969 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 754 transitions. Word has length 145 [2022-07-11 23:56:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:50,969 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 754 transitions. [2022-07-11 23:56:50,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 754 transitions. [2022-07-11 23:56:50,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-11 23:56:50,970 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:50,970 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, 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] [2022-07-11 23:56:50,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-11 23:56:50,971 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:50,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:50,971 INFO L85 PathProgramCache]: Analyzing trace with hash -423127345, now seen corresponding path program 1 times [2022-07-11 23:56:50,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:50,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086000713] [2022-07-11 23:56:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:50,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:56:51,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:51,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086000713] [2022-07-11 23:56:51,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086000713] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:51,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:51,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:51,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939231187] [2022-07-11 23:56:51,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:51,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:51,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:51,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:51,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:51,053 INFO L87 Difference]: Start difference. First operand 505 states and 754 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:51,097 INFO L93 Difference]: Finished difference Result 1466 states and 2203 transitions. [2022-07-11 23:56:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:51,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 150 [2022-07-11 23:56:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:51,100 INFO L225 Difference]: With dead ends: 1466 [2022-07-11 23:56:51,100 INFO L226 Difference]: Without dead ends: 982 [2022-07-11 23:56:51,100 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 [2022-07-11 23:56:51,101 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 137 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:51,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 445 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-07-11 23:56:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 982. [2022-07-11 23:56:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.491335372069317) internal successors, (1463), 981 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1463 transitions. [2022-07-11 23:56:51,124 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1463 transitions. Word has length 150 [2022-07-11 23:56:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:51,124 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1463 transitions. [2022-07-11 23:56:51,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1463 transitions. [2022-07-11 23:56:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-11 23:56:51,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:51,125 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, 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] [2022-07-11 23:56:51,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-11 23:56:51,126 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:51,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1461711919, now seen corresponding path program 1 times [2022-07-11 23:56:51,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:51,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135320703] [2022-07-11 23:56:51,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:51,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-11 23:56:51,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:51,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135320703] [2022-07-11 23:56:51,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135320703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:51,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:51,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:51,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857335996] [2022-07-11 23:56:51,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:51,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:51,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:51,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:51,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:51,198 INFO L87 Difference]: Start difference. First operand 982 states and 1463 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:51,233 INFO L93 Difference]: Finished difference Result 1970 states and 2938 transitions. [2022-07-11 23:56:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 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 150 [2022-07-11 23:56:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:51,236 INFO L225 Difference]: With dead ends: 1970 [2022-07-11 23:56:51,236 INFO L226 Difference]: Without dead ends: 1009 [2022-07-11 23:56:51,237 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 [2022-07-11 23:56:51,237 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:51,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 418 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-07-11 23:56:51,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 1009. [2022-07-11 23:56:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 1.4861111111111112) internal successors, (1498), 1008 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1498 transitions. [2022-07-11 23:56:51,252 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1498 transitions. Word has length 150 [2022-07-11 23:56:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:51,252 INFO L495 AbstractCegarLoop]: Abstraction has 1009 states and 1498 transitions. [2022-07-11 23:56:51,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,252 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1498 transitions. [2022-07-11 23:56:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-11 23:56:51,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:51,254 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, 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] [2022-07-11 23:56:51,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-11 23:56:51,254 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:51,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:51,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1885203411, now seen corresponding path program 1 times [2022-07-11 23:56:51,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:51,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583081353] [2022-07-11 23:56:51,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:51,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-11 23:56:51,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:51,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583081353] [2022-07-11 23:56:51,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583081353] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:51,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:51,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:51,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626609290] [2022-07-11 23:56:51,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:51,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:51,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:51,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:51,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:51,319 INFO L87 Difference]: Start difference. First operand 1009 states and 1498 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:51,349 INFO L93 Difference]: Finished difference Result 1999 states and 2974 transitions. [2022-07-11 23:56:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:51,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2022-07-11 23:56:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:51,352 INFO L225 Difference]: With dead ends: 1999 [2022-07-11 23:56:51,352 INFO L226 Difference]: Without dead ends: 1011 [2022-07-11 23:56:51,353 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 [2022-07-11 23:56:51,353 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:51,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 397 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:51,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-07-11 23:56:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1011. [2022-07-11 23:56:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 1.4851485148514851) internal successors, (1500), 1010 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1500 transitions. [2022-07-11 23:56:51,379 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1500 transitions. Word has length 150 [2022-07-11 23:56:51,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:51,380 INFO L495 AbstractCegarLoop]: Abstraction has 1011 states and 1500 transitions. [2022-07-11 23:56:51,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1500 transitions. [2022-07-11 23:56:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-11 23:56:51,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:51,382 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, 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, 1] [2022-07-11 23:56:51,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-11 23:56:51,382 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:51,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:51,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1274245440, now seen corresponding path program 1 times [2022-07-11 23:56:51,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:51,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544604857] [2022-07-11 23:56:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:51,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-11 23:56:51,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:51,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544604857] [2022-07-11 23:56:51,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544604857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:51,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:51,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:51,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879304063] [2022-07-11 23:56:51,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:51,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:51,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:51,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:51,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:51,468 INFO L87 Difference]: Start difference. First operand 1011 states and 1500 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) [2022-07-11 23:56:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:51,525 INFO L93 Difference]: Finished difference Result 2474 states and 3690 transitions. [2022-07-11 23:56:51,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:51,526 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 169 [2022-07-11 23:56:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:51,529 INFO L225 Difference]: With dead ends: 2474 [2022-07-11 23:56:51,530 INFO L226 Difference]: Without dead ends: 1486 [2022-07-11 23:56:51,531 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 [2022-07-11 23:56:51,531 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:51,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 577 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-07-11 23:56:51,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1486. [2022-07-11 23:56:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 1.4855218855218855) internal successors, (2206), 1485 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2206 transitions. [2022-07-11 23:56:51,553 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2206 transitions. Word has length 169 [2022-07-11 23:56:51,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:51,553 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 2206 transitions. [2022-07-11 23:56:51,553 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) [2022-07-11 23:56:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2206 transitions. [2022-07-11 23:56:51,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-07-11 23:56:51,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:51,555 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, 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, 1, 1] [2022-07-11 23:56:51,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-11 23:56:51,555 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:51,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1177340101, now seen corresponding path program 1 times [2022-07-11 23:56:51,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:51,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701328550] [2022-07-11 23:56:51,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:51,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:51,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:51,659 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-11 23:56:51,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:51,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701328550] [2022-07-11 23:56:51,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701328550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:51,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:51,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:51,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007886291] [2022-07-11 23:56:51,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:51,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:51,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:51,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:51,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:51,661 INFO L87 Difference]: Start difference. First operand 1486 states and 2206 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:51,721 INFO L93 Difference]: Finished difference Result 3392 states and 5053 transitions. [2022-07-11 23:56:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:51,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 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 170 [2022-07-11 23:56:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:51,726 INFO L225 Difference]: With dead ends: 3392 [2022-07-11 23:56:51,726 INFO L226 Difference]: Without dead ends: 1929 [2022-07-11 23:56:51,728 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 [2022-07-11 23:56:51,728 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 140 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:51,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 571 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2022-07-11 23:56:51,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1929. [2022-07-11 23:56:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 1.4849585062240664) internal successors, (2863), 1928 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2863 transitions. [2022-07-11 23:56:51,755 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2863 transitions. Word has length 170 [2022-07-11 23:56:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:51,755 INFO L495 AbstractCegarLoop]: Abstraction has 1929 states and 2863 transitions. [2022-07-11 23:56:51,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2863 transitions. [2022-07-11 23:56:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-11 23:56:51,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:51,758 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-07-11 23:56:51,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-11 23:56:51,758 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1971855452, now seen corresponding path program 1 times [2022-07-11 23:56:51,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:51,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790930465] [2022-07-11 23:56:51,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:51,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-07-11 23:56:51,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:51,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790930465] [2022-07-11 23:56:51,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790930465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:51,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:51,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:51,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375626965] [2022-07-11 23:56:51,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:51,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:51,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:51,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:51,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:51,858 INFO L87 Difference]: Start difference. First operand 1929 states and 2863 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) [2022-07-11 23:56:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:51,949 INFO L93 Difference]: Finished difference Result 4317 states and 6427 transitions. [2022-07-11 23:56:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:51,949 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 252 [2022-07-11 23:56:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:51,955 INFO L225 Difference]: With dead ends: 4317 [2022-07-11 23:56:51,955 INFO L226 Difference]: Without dead ends: 2411 [2022-07-11 23:56:51,957 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 [2022-07-11 23:56:51,957 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 155 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:51,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 378 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:51,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2022-07-11 23:56:51,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2411. [2022-07-11 23:56:51,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 1.4867219917012449) internal successors, (3583), 2410 states have internal predecessors, (3583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 3583 transitions. [2022-07-11 23:56:51,994 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 3583 transitions. Word has length 252 [2022-07-11 23:56:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:51,994 INFO L495 AbstractCegarLoop]: Abstraction has 2411 states and 3583 transitions. [2022-07-11 23:56:51,994 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) [2022-07-11 23:56:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 3583 transitions. [2022-07-11 23:56:51,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-07-11 23:56:51,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:51,997 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 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] [2022-07-11 23:56:51,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-11 23:56:51,998 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:51,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1276348089, now seen corresponding path program 1 times [2022-07-11 23:56:51,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:51,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744864690] [2022-07-11 23:56:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:51,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 474 proven. 106 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-11 23:56:52,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:52,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744864690] [2022-07-11 23:56:52,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744864690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:56:52,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018237331] [2022-07-11 23:56:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:52,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:56:52,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:56:52,148 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) [2022-07-11 23:56:52,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:56:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:52,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1512 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 23:56:52,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:56:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2022-07-11 23:56:53,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:56:53,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018237331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:53,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:56:53,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-11 23:56:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489721493] [2022-07-11 23:56:53,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:53,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:53,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:53,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:56:53,012 INFO L87 Difference]: Start difference. First operand 2411 states and 3583 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 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) [2022-07-11 23:56:53,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:53,085 INFO L93 Difference]: Finished difference Result 5281 states and 7867 transitions. [2022-07-11 23:56:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:53,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 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 294 [2022-07-11 23:56:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:53,103 INFO L225 Difference]: With dead ends: 5281 [2022-07-11 23:56:53,103 INFO L226 Difference]: Without dead ends: 2893 [2022-07-11 23:56:53,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:56:53,106 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:53,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 376 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:53,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2022-07-11 23:56:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 2893. [2022-07-11 23:56:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2893 states, 2892 states have (on average 1.4885892116182573) internal successors, (4305), 2892 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2893 states to 2893 states and 4305 transitions. [2022-07-11 23:56:53,169 INFO L78 Accepts]: Start accepts. Automaton has 2893 states and 4305 transitions. Word has length 294 [2022-07-11 23:56:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:53,170 INFO L495 AbstractCegarLoop]: Abstraction has 2893 states and 4305 transitions. [2022-07-11 23:56:53,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 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) [2022-07-11 23:56:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2893 states and 4305 transitions. [2022-07-11 23:56:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-07-11 23:56:53,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:53,174 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 3, 3, 3, 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] [2022-07-11 23:56:53,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:56:53,390 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,SelfDestructingSolverStorable42 [2022-07-11 23:56:53,390 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:53,391 INFO L85 PathProgramCache]: Analyzing trace with hash -142532707, now seen corresponding path program 1 times [2022-07-11 23:56:53,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:53,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915094755] [2022-07-11 23:56:53,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:53,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 820 proven. 106 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-07-11 23:56:53,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:53,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915094755] [2022-07-11 23:56:53,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915094755] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:56:53,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236873065] [2022-07-11 23:56:53,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:53,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:56:53,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:56:53,553 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) [2022-07-11 23:56:53,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:56:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:54,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 23:56:54,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:56:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 529 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-07-11 23:56:54,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:56:54,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236873065] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:54,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:56:54,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-11 23:56:54,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655887606] [2022-07-11 23:56:54,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:54,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:54,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:54,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:54,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:56:54,500 INFO L87 Difference]: Start difference. First operand 2893 states and 4305 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) [2022-07-11 23:56:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:54,584 INFO L93 Difference]: Finished difference Result 6245 states and 9311 transitions. [2022-07-11 23:56:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:54,585 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 379 [2022-07-11 23:56:54,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:54,590 INFO L225 Difference]: With dead ends: 6245 [2022-07-11 23:56:54,590 INFO L226 Difference]: Without dead ends: 3375 [2022-07-11 23:56:54,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:56:54,593 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 154 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:54,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 375 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2022-07-11 23:56:54,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 3375. [2022-07-11 23:56:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3375 states, 3374 states have (on average 1.4902193242442205) internal successors, (5028), 3374 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3375 states to 3375 states and 5028 transitions. [2022-07-11 23:56:54,664 INFO L78 Accepts]: Start accepts. Automaton has 3375 states and 5028 transitions. Word has length 379 [2022-07-11 23:56:54,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:54,664 INFO L495 AbstractCegarLoop]: Abstraction has 3375 states and 5028 transitions. [2022-07-11 23:56:54,665 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) [2022-07-11 23:56:54,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3375 states and 5028 transitions. [2022-07-11 23:56:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2022-07-11 23:56:54,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:54,670 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 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] [2022-07-11 23:56:54,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:56:54,883 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,SelfDestructingSolverStorable43 [2022-07-11 23:56:54,884 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:54,884 INFO L85 PathProgramCache]: Analyzing trace with hash 180850149, now seen corresponding path program 1 times [2022-07-11 23:56:54,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:54,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082517237] [2022-07-11 23:56:54,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:54,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 995 proven. 106 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2022-07-11 23:56:55,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:55,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082517237] [2022-07-11 23:56:55,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082517237] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:56:55,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785932754] [2022-07-11 23:56:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:55,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:56:55,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:56:55,096 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) [2022-07-11 23:56:55,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:56:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:55,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 23:56:55,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:56:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 1254 trivial. 0 not checked. [2022-07-11 23:56:56,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:56:56,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785932754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:56,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:56:56,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-11 23:56:56,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942509378] [2022-07-11 23:56:56,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:56,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:56,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:56,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:56,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:56:56,018 INFO L87 Difference]: Start difference. First operand 3375 states and 5028 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:56,129 INFO L93 Difference]: Finished difference Result 7204 states and 10750 transitions. [2022-07-11 23:56:56,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:56,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 422 [2022-07-11 23:56:56,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:56,137 INFO L225 Difference]: With dead ends: 7204 [2022-07-11 23:56:56,137 INFO L226 Difference]: Without dead ends: 3852 [2022-07-11 23:56:56,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:56:56,141 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 143 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:56,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 577 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:56,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3852 states. [2022-07-11 23:56:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3852 to 3852. [2022-07-11 23:56:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 1.4894832511036094) internal successors, (5736), 3851 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 5736 transitions. [2022-07-11 23:56:56,205 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 5736 transitions. Word has length 422 [2022-07-11 23:56:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:56,205 INFO L495 AbstractCegarLoop]: Abstraction has 3852 states and 5736 transitions. [2022-07-11 23:56:56,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 5736 transitions. [2022-07-11 23:56:56,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-07-11 23:56:56,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:56,211 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 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] [2022-07-11 23:56:56,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:56:56,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:56:56,431 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:56,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash -676054420, now seen corresponding path program 1 times [2022-07-11 23:56:56,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:56,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913471484] [2022-07-11 23:56:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:56,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 1003 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-07-11 23:56:56,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:56,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913471484] [2022-07-11 23:56:56,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913471484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:56,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:56,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:56:56,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461629736] [2022-07-11 23:56:56,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:56,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:56:56,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:56,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:56:56,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:56:56,592 INFO L87 Difference]: Start difference. First operand 3852 states and 5736 transitions. Second operand has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:57,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:57,109 INFO L93 Difference]: Finished difference Result 8334 states and 12347 transitions. [2022-07-11 23:56:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:56:57,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 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 423 [2022-07-11 23:56:57,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:57,116 INFO L225 Difference]: With dead ends: 8334 [2022-07-11 23:56:57,116 INFO L226 Difference]: Without dead ends: 4505 [2022-07-11 23:56:57,120 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 [2022-07-11 23:56:57,120 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 62 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:57,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 659 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:56:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-07-11 23:56:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4180. [2022-07-11 23:56:57,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4180 states, 4179 states have (on average 1.4893515195022733) internal successors, (6224), 4179 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4180 states to 4180 states and 6224 transitions. [2022-07-11 23:56:57,213 INFO L78 Accepts]: Start accepts. Automaton has 4180 states and 6224 transitions. Word has length 423 [2022-07-11 23:56:57,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:57,214 INFO L495 AbstractCegarLoop]: Abstraction has 4180 states and 6224 transitions. [2022-07-11 23:56:57,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.25) internal successors, (177), 4 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:57,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4180 states and 6224 transitions. [2022-07-11 23:56:57,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-07-11 23:56:57,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:57,220 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 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] [2022-07-11 23:56:57,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-11 23:56:57,220 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:57,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:57,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2009734672, now seen corresponding path program 1 times [2022-07-11 23:56:57,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:57,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594170182] [2022-07-11 23:56:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:57,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:57,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1565 backedges. 600 proven. 0 refuted. 0 times theorem prover too weak. 965 trivial. 0 not checked. [2022-07-11 23:56:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:57,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594170182] [2022-07-11 23:56:57,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594170182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:57,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:57,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:57,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67662210] [2022-07-11 23:56:57,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:57,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:57,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:57,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:57,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:57,373 INFO L87 Difference]: Start difference. First operand 4180 states and 6224 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:57,488 INFO L93 Difference]: Finished difference Result 8823 states and 13154 transitions. [2022-07-11 23:56:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 423 [2022-07-11 23:56:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:57,495 INFO L225 Difference]: With dead ends: 8823 [2022-07-11 23:56:57,496 INFO L226 Difference]: Without dead ends: 4666 [2022-07-11 23:56:57,499 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 [2022-07-11 23:56:57,500 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 140 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:57,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 577 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:57,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2022-07-11 23:56:57,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4666. [2022-07-11 23:56:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4666 states, 4665 states have (on average 1.4885316184351554) internal successors, (6944), 4665 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4666 states to 4666 states and 6944 transitions. [2022-07-11 23:56:57,571 INFO L78 Accepts]: Start accepts. Automaton has 4666 states and 6944 transitions. Word has length 423 [2022-07-11 23:56:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:57,572 INFO L495 AbstractCegarLoop]: Abstraction has 4666 states and 6944 transitions. [2022-07-11 23:56:57,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4666 states and 6944 transitions. [2022-07-11 23:56:57,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2022-07-11 23:56:57,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:57,579 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:56:57,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-07-11 23:56:57,579 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:57,579 INFO L85 PathProgramCache]: Analyzing trace with hash -61188847, now seen corresponding path program 1 times [2022-07-11 23:56:57,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:57,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941386049] [2022-07-11 23:56:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:57,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2318 backedges. 753 proven. 0 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2022-07-11 23:56:57,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:57,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941386049] [2022-07-11 23:56:57,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941386049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:56:57,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:56:57,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:56:57,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786443127] [2022-07-11 23:56:57,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:56:57,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:56:57,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:56:57,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:56:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:56:57,787 INFO L87 Difference]: Start difference. First operand 4666 states and 6944 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:56:57,911 INFO L93 Difference]: Finished difference Result 9832 states and 14650 transitions. [2022-07-11 23:56:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:56:57,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 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 509 [2022-07-11 23:56:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:56:57,918 INFO L225 Difference]: With dead ends: 9832 [2022-07-11 23:56:57,918 INFO L226 Difference]: Without dead ends: 5189 [2022-07-11 23:56:57,922 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 [2022-07-11 23:56:57,923 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 153 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:56:57,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 372 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:56:57,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5189 states. [2022-07-11 23:56:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5189 to 5189. [2022-07-11 23:56:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5189 states, 5188 states have (on average 1.4901696222050886) internal successors, (7731), 5188 states have internal predecessors, (7731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 7731 transitions. [2022-07-11 23:56:58,020 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 7731 transitions. Word has length 509 [2022-07-11 23:56:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:56:58,020 INFO L495 AbstractCegarLoop]: Abstraction has 5189 states and 7731 transitions. [2022-07-11 23:56:58,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:56:58,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 7731 transitions. [2022-07-11 23:56:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2022-07-11 23:56:58,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:56:58,027 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:56:58,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-07-11 23:56:58,027 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:56:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:56:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash 600999647, now seen corresponding path program 1 times [2022-07-11 23:56:58,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:56:58,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780479707] [2022-07-11 23:56:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:58,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:56:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1400 proven. 48 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2022-07-11 23:56:58,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:56:58,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780479707] [2022-07-11 23:56:58,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780479707] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:56:58,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670023222] [2022-07-11 23:56:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:56:58,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:56:58,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:56:58,400 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) [2022-07-11 23:56:58,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:56:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:56:59,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 2422 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-11 23:56:59,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:56:59,430 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:56:59,430 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 [2022-07-11 23:56:59,497 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-11 23:56:59,498 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 [2022-07-11 23:56:59,548 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:56:59,549 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 [2022-07-11 23:56:59,563 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 [2022-07-11 23:56:59,588 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 [2022-07-11 23:56:59,592 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 [2022-07-11 23:56:59,621 INFO L356 Elim1Store]: treesize reduction 60, result has 39.4 percent of original size [2022-07-11 23:56:59,621 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 55 [2022-07-11 23:56:59,693 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-11 23:56:59,693 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 34 treesize of output 36 [2022-07-11 23:56:59,854 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:56:59,854 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 [2022-07-11 23:56:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1394 proven. 204 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2022-07-11 23:56:59,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:56:59,988 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 77 treesize of output 53 [2022-07-11 23:56:59,992 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 53 treesize of output 41 [2022-07-11 23:57:01,663 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 100 treesize of output 88 [2022-07-11 23:57:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1392 proven. 0 refuted. 0 times theorem prover too weak. 1360 trivial. 0 not checked. [2022-07-11 23:57:01,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670023222] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:57:01,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:57:01,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 14] total 20 [2022-07-11 23:57:01,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798061535] [2022-07-11 23:57:01,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:01,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:57:01,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:01,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:57:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-07-11 23:57:01,671 INFO L87 Difference]: Start difference. First operand 5189 states and 7731 transitions. Second operand has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:07,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:07,362 INFO L93 Difference]: Finished difference Result 14067 states and 20912 transitions. [2022-07-11 23:57:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:57:07,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 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 553 [2022-07-11 23:57:07,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:07,377 INFO L225 Difference]: With dead ends: 14067 [2022-07-11 23:57:07,377 INFO L226 Difference]: Without dead ends: 8901 [2022-07-11 23:57:07,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1120 GetRequests, 1098 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:57:07,384 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 408 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:07,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 893 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 539 Invalid, 0 Unknown, 269 Unchecked, 1.4s Time] [2022-07-11 23:57:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8901 states. [2022-07-11 23:57:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8901 to 7594. [2022-07-11 23:57:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7594 states, 7593 states have (on average 1.5029632556301857) internal successors, (11412), 7593 states have internal predecessors, (11412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7594 states to 7594 states and 11412 transitions. [2022-07-11 23:57:07,556 INFO L78 Accepts]: Start accepts. Automaton has 7594 states and 11412 transitions. Word has length 553 [2022-07-11 23:57:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:07,557 INFO L495 AbstractCegarLoop]: Abstraction has 7594 states and 11412 transitions. [2022-07-11 23:57:07,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.142857142857142) internal successors, (190), 7 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 7594 states and 11412 transitions. [2022-07-11 23:57:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2022-07-11 23:57:07,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:07,567 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:57:07,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:57:07,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-11 23:57:07,768 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2030253142, now seen corresponding path program 1 times [2022-07-11 23:57:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:07,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894195600] [2022-07-11 23:57:07,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2767 backedges. 1532 proven. 0 refuted. 0 times theorem prover too weak. 1235 trivial. 0 not checked. [2022-07-11 23:57:07,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:07,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894195600] [2022-07-11 23:57:07,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894195600] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:07,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:07,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:07,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469365244] [2022-07-11 23:57:07,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:07,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:07,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:07,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:07,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:07,982 INFO L87 Difference]: Start difference. First operand 7594 states and 11412 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:08,829 INFO L93 Difference]: Finished difference Result 15687 states and 23455 transitions. [2022-07-11 23:57:08,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 556 [2022-07-11 23:57:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:08,839 INFO L225 Difference]: With dead ends: 15687 [2022-07-11 23:57:08,840 INFO L226 Difference]: Without dead ends: 8116 [2022-07-11 23:57:08,847 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 [2022-07-11 23:57:08,847 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 60 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:08,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 657 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:57:08,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8116 states. [2022-07-11 23:57:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8116 to 7604. [2022-07-11 23:57:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7604 states, 7603 states have (on average 1.5023017230040774) internal successors, (11422), 7603 states have internal predecessors, (11422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7604 states to 7604 states and 11422 transitions. [2022-07-11 23:57:09,052 INFO L78 Accepts]: Start accepts. Automaton has 7604 states and 11422 transitions. Word has length 556 [2022-07-11 23:57:09,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:09,053 INFO L495 AbstractCegarLoop]: Abstraction has 7604 states and 11422 transitions. [2022-07-11 23:57:09,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 7604 states and 11422 transitions. [2022-07-11 23:57:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-07-11 23:57:09,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:09,067 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 11, 11, 11, 11, 11, 11, 11, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-07-11 23:57:09,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-07-11 23:57:09,068 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:09,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:09,068 INFO L85 PathProgramCache]: Analyzing trace with hash -491957639, now seen corresponding path program 1 times [2022-07-11 23:57:09,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:09,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572484899] [2022-07-11 23:57:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:09,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 1848 proven. 21 refuted. 0 times theorem prover too weak. 1359 trivial. 0 not checked. [2022-07-11 23:57:09,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572484899] [2022-07-11 23:57:09,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572484899] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:57:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407679428] [2022-07-11 23:57:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:09,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:57:09,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:57:09,292 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) [2022-07-11 23:57:09,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:57:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:10,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 2672 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 23:57:10,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:57:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3228 backedges. 2175 proven. 0 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2022-07-11 23:57:10,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:57:10,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407679428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:10,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 23:57:10,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-11 23:57:10,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674436878] [2022-07-11 23:57:10,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:10,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:57:10,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:10,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:57:10,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:57:10,507 INFO L87 Difference]: Start difference. First operand 7604 states and 11422 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 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) [2022-07-11 23:57:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:10,660 INFO L93 Difference]: Finished difference Result 16102 states and 24204 transitions. [2022-07-11 23:57:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:57:10,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 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 598 [2022-07-11 23:57:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:10,670 INFO L225 Difference]: With dead ends: 16102 [2022-07-11 23:57:10,670 INFO L226 Difference]: Without dead ends: 8521 [2022-07-11 23:57:10,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 600 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:57:10,680 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 154 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:10,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 377 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:57:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8521 states. [2022-07-11 23:57:10,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8521 to 8521. [2022-07-11 23:57:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8521 states, 8520 states have (on average 1.503169014084507) internal successors, (12807), 8520 states have internal predecessors, (12807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8521 states to 8521 states and 12807 transitions. [2022-07-11 23:57:10,889 INFO L78 Accepts]: Start accepts. Automaton has 8521 states and 12807 transitions. Word has length 598 [2022-07-11 23:57:10,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:10,890 INFO L495 AbstractCegarLoop]: Abstraction has 8521 states and 12807 transitions. [2022-07-11 23:57:10,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 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) [2022-07-11 23:57:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 8521 states and 12807 transitions. [2022-07-11 23:57:10,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2022-07-11 23:57:10,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:10,900 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 14, 14, 14, 14, 14, 14, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:57:10,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:57:11,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:57:11,105 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:11,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:11,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1880698354, now seen corresponding path program 1 times [2022-07-11 23:57:11,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:11,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48111746] [2022-07-11 23:57:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:11,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3127 backedges. 1441 proven. 0 refuted. 0 times theorem prover too weak. 1686 trivial. 0 not checked. [2022-07-11 23:57:11,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:11,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48111746] [2022-07-11 23:57:11,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48111746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:11,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:11,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:11,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731378537] [2022-07-11 23:57:11,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:11,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:11,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:11,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:11,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:11,294 INFO L87 Difference]: Start difference. First operand 8521 states and 12807 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 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) [2022-07-11 23:57:11,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:11,932 INFO L93 Difference]: Finished difference Result 17481 states and 26170 transitions. [2022-07-11 23:57:11,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:11,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 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 601 [2022-07-11 23:57:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:11,941 INFO L225 Difference]: With dead ends: 17481 [2022-07-11 23:57:11,941 INFO L226 Difference]: Without dead ends: 8983 [2022-07-11 23:57:11,947 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 [2022-07-11 23:57:11,948 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 81 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:11,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 643 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:57:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8983 states. [2022-07-11 23:57:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8983 to 8521. [2022-07-11 23:57:12,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8521 states, 8520 states have (on average 1.501056338028169) internal successors, (12789), 8520 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8521 states to 8521 states and 12789 transitions. [2022-07-11 23:57:12,104 INFO L78 Accepts]: Start accepts. Automaton has 8521 states and 12789 transitions. Word has length 601 [2022-07-11 23:57:12,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:12,104 INFO L495 AbstractCegarLoop]: Abstraction has 8521 states and 12789 transitions. [2022-07-11 23:57:12,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 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) [2022-07-11 23:57:12,104 INFO L276 IsEmpty]: Start isEmpty. Operand 8521 states and 12789 transitions. [2022-07-11 23:57:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2022-07-11 23:57:12,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:12,115 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:57:12,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-07-11 23:57:12,115 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:12,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:12,115 INFO L85 PathProgramCache]: Analyzing trace with hash 104446311, now seen corresponding path program 1 times [2022-07-11 23:57:12,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:12,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304896024] [2022-07-11 23:57:12,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:12,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3529 backedges. 1681 proven. 0 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2022-07-11 23:57:12,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:12,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304896024] [2022-07-11 23:57:12,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304896024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:12,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:12,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:12,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612688342] [2022-07-11 23:57:12,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:12,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:12,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:12,347 INFO L87 Difference]: Start difference. First operand 8521 states and 12789 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 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) [2022-07-11 23:57:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:13,203 INFO L93 Difference]: Finished difference Result 17481 states and 26134 transitions. [2022-07-11 23:57:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:13,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 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 619 [2022-07-11 23:57:13,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:13,213 INFO L225 Difference]: With dead ends: 17481 [2022-07-11 23:57:13,213 INFO L226 Difference]: Without dead ends: 8983 [2022-07-11 23:57:13,219 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 [2022-07-11 23:57:13,219 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 71 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:13,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 641 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:57:13,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8983 states. [2022-07-11 23:57:13,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8983 to 8521. [2022-07-11 23:57:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8521 states, 8520 states have (on average 1.498943661971831) internal successors, (12771), 8520 states have internal predecessors, (12771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8521 states to 8521 states and 12771 transitions. [2022-07-11 23:57:13,417 INFO L78 Accepts]: Start accepts. Automaton has 8521 states and 12771 transitions. Word has length 619 [2022-07-11 23:57:13,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:13,418 INFO L495 AbstractCegarLoop]: Abstraction has 8521 states and 12771 transitions. [2022-07-11 23:57:13,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 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) [2022-07-11 23:57:13,418 INFO L276 IsEmpty]: Start isEmpty. Operand 8521 states and 12771 transitions. [2022-07-11 23:57:13,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2022-07-11 23:57:13,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:13,428 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:57:13,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-07-11 23:57:13,429 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:13,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2144528921, now seen corresponding path program 1 times [2022-07-11 23:57:13,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:13,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96165455] [2022-07-11 23:57:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:13,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3586 backedges. 1931 proven. 46 refuted. 0 times theorem prover too weak. 1609 trivial. 0 not checked. [2022-07-11 23:57:13,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:13,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96165455] [2022-07-11 23:57:13,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96165455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:57:13,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016827412] [2022-07-11 23:57:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:13,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:57:13,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:57:13,624 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) [2022-07-11 23:57:13,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:57:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 2689 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-11 23:57:14,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:57:14,752 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:57:14,752 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 [2022-07-11 23:57:14,778 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:57:14,778 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 [2022-07-11 23:57:14,798 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 [2022-07-11 23:57:14,809 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:57:14,810 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 [2022-07-11 23:57:14,864 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 [2022-07-11 23:57:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3586 backedges. 1926 proven. 126 refuted. 0 times theorem prover too weak. 1534 trivial. 0 not checked. [2022-07-11 23:57:14,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:57:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3586 backedges. 1947 proven. 0 refuted. 0 times theorem prover too weak. 1639 trivial. 0 not checked. [2022-07-11 23:57:14,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016827412] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:57:14,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:57:14,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8] total 10 [2022-07-11 23:57:14,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583119690] [2022-07-11 23:57:14,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:14,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:14,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:14,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:57:14,983 INFO L87 Difference]: Start difference. First operand 8521 states and 12771 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:15,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:15,991 INFO L93 Difference]: Finished difference Result 18216 states and 27145 transitions. [2022-07-11 23:57:15,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:15,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 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 619 [2022-07-11 23:57:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:16,003 INFO L225 Difference]: With dead ends: 18216 [2022-07-11 23:57:16,003 INFO L226 Difference]: Without dead ends: 9718 [2022-07-11 23:57:16,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1245 GetRequests, 1236 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:57:16,010 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 116 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:16,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 481 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:57:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9718 states. [2022-07-11 23:57:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9718 to 8532. [2022-07-11 23:57:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8532 states, 8531 states have (on average 1.498300316492791) internal successors, (12782), 8531 states have internal predecessors, (12782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8532 states to 8532 states and 12782 transitions. [2022-07-11 23:57:16,182 INFO L78 Accepts]: Start accepts. Automaton has 8532 states and 12782 transitions. Word has length 619 [2022-07-11 23:57:16,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:16,183 INFO L495 AbstractCegarLoop]: Abstraction has 8532 states and 12782 transitions. [2022-07-11 23:57:16,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 8532 states and 12782 transitions. [2022-07-11 23:57:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2022-07-11 23:57:16,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:16,193 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:57:16,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:57:16,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:57:16,401 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:16,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1851564773, now seen corresponding path program 1 times [2022-07-11 23:57:16,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:16,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348479072] [2022-07-11 23:57:16,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:16,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3568 backedges. 1701 proven. 0 refuted. 0 times theorem prover too weak. 1867 trivial. 0 not checked. [2022-07-11 23:57:16,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:16,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348479072] [2022-07-11 23:57:16,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348479072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:16,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:16,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:16,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611378625] [2022-07-11 23:57:16,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:16,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:16,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:16,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:16,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:16,635 INFO L87 Difference]: Start difference. First operand 8532 states and 12782 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 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) [2022-07-11 23:57:18,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:19,036 INFO L93 Difference]: Finished difference Result 17431 states and 26018 transitions. [2022-07-11 23:57:19,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:19,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 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 622 [2022-07-11 23:57:19,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:19,046 INFO L225 Difference]: With dead ends: 17431 [2022-07-11 23:57:19,046 INFO L226 Difference]: Without dead ends: 8922 [2022-07-11 23:57:19,052 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 [2022-07-11 23:57:19,053 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 65 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:19,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 633 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:57:19,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8922 states. [2022-07-11 23:57:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8922 to 8532. [2022-07-11 23:57:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8532 states, 8531 states have (on average 1.4961903645528074) internal successors, (12764), 8531 states have internal predecessors, (12764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8532 states to 8532 states and 12764 transitions. [2022-07-11 23:57:19,212 INFO L78 Accepts]: Start accepts. Automaton has 8532 states and 12764 transitions. Word has length 622 [2022-07-11 23:57:19,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:19,212 INFO L495 AbstractCegarLoop]: Abstraction has 8532 states and 12764 transitions. [2022-07-11 23:57:19,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 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) [2022-07-11 23:57:19,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8532 states and 12764 transitions. [2022-07-11 23:57:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 623 [2022-07-11 23:57:19,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:19,222 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:57:19,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-07-11 23:57:19,222 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:19,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:19,223 INFO L85 PathProgramCache]: Analyzing trace with hash 777098214, now seen corresponding path program 1 times [2022-07-11 23:57:19,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:19,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30244253] [2022-07-11 23:57:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:19,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3601 backedges. 1836 proven. 0 refuted. 0 times theorem prover too weak. 1765 trivial. 0 not checked. [2022-07-11 23:57:19,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:19,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30244253] [2022-07-11 23:57:19,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30244253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:19,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:19,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:19,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894121685] [2022-07-11 23:57:19,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:19,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:19,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:19,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:19,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:19,444 INFO L87 Difference]: Start difference. First operand 8532 states and 12764 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:21,462 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 [] [2022-07-11 23:57:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:21,796 INFO L93 Difference]: Finished difference Result 17855 states and 26667 transitions. [2022-07-11 23:57:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:21,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 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 622 [2022-07-11 23:57:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:21,814 INFO L225 Difference]: With dead ends: 17855 [2022-07-11 23:57:21,814 INFO L226 Difference]: Without dead ends: 9346 [2022-07-11 23:57:21,820 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 [2022-07-11 23:57:21,821 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 36 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:21,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 587 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 181 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:57:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9346 states. [2022-07-11 23:57:21,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9346 to 9000. [2022-07-11 23:57:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9000 states, 8999 states have (on average 1.4963884876097344) internal successors, (13466), 8999 states have internal predecessors, (13466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9000 states to 9000 states and 13466 transitions. [2022-07-11 23:57:21,992 INFO L78 Accepts]: Start accepts. Automaton has 9000 states and 13466 transitions. Word has length 622 [2022-07-11 23:57:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:21,992 INFO L495 AbstractCegarLoop]: Abstraction has 9000 states and 13466 transitions. [2022-07-11 23:57:21,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 9000 states and 13466 transitions. [2022-07-11 23:57:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-11 23:57:22,003 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:22,003 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:57:22,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-07-11 23:57:22,003 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:22,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1689715661, now seen corresponding path program 1 times [2022-07-11 23:57:22,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:22,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542602130] [2022-07-11 23:57:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:22,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1991 proven. 0 refuted. 0 times theorem prover too weak. 1904 trivial. 0 not checked. [2022-07-11 23:57:22,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:22,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542602130] [2022-07-11 23:57:22,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542602130] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:22,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:22,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:57:22,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125688073] [2022-07-11 23:57:22,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:22,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:57:22,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:22,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:57:22,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:57:22,406 INFO L87 Difference]: Start difference. First operand 9000 states and 13466 transitions. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:24,211 INFO L93 Difference]: Finished difference Result 22163 states and 33133 transitions. [2022-07-11 23:57:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:57:24,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 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 [2022-07-11 23:57:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:24,226 INFO L225 Difference]: With dead ends: 22163 [2022-07-11 23:57:24,227 INFO L226 Difference]: Without dead ends: 13186 [2022-07-11 23:57:24,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:57:24,234 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 112 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:24,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 948 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:57:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13186 states. [2022-07-11 23:57:24,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13186 to 9970. [2022-07-11 23:57:24,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9970 states, 9969 states have (on average 1.490921857759053) internal successors, (14863), 9969 states have internal predecessors, (14863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9970 states to 9970 states and 14863 transitions. [2022-07-11 23:57:24,521 INFO L78 Accepts]: Start accepts. Automaton has 9970 states and 14863 transitions. Word has length 640 [2022-07-11 23:57:24,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:24,522 INFO L495 AbstractCegarLoop]: Abstraction has 9970 states and 14863 transitions. [2022-07-11 23:57:24,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:24,522 INFO L276 IsEmpty]: Start isEmpty. Operand 9970 states and 14863 transitions. [2022-07-11 23:57:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-11 23:57:24,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:24,536 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:57:24,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-07-11 23:57:24,537 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:24,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:24,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1862113509, now seen corresponding path program 1 times [2022-07-11 23:57:24,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:24,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152327894] [2022-07-11 23:57:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:24,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3691 backedges. 1898 proven. 0 refuted. 0 times theorem prover too weak. 1793 trivial. 0 not checked. [2022-07-11 23:57:24,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:24,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152327894] [2022-07-11 23:57:24,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152327894] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:24,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:24,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:24,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579203542] [2022-07-11 23:57:24,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:24,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:24,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:24,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:24,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:24,780 INFO L87 Difference]: Start difference. First operand 9970 states and 14863 transitions. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:25,804 INFO L93 Difference]: Finished difference Result 20449 states and 30437 transitions. [2022-07-11 23:57:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 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 [2022-07-11 23:57:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:25,816 INFO L225 Difference]: With dead ends: 20449 [2022-07-11 23:57:25,816 INFO L226 Difference]: Without dead ends: 10502 [2022-07-11 23:57:25,824 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 [2022-07-11 23:57:25,824 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 47 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:25,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 598 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:57:25,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10502 states. [2022-07-11 23:57:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10502 to 9970. [2022-07-11 23:57:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9970 states, 9969 states have (on average 1.4889156384792859) internal successors, (14843), 9969 states have internal predecessors, (14843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9970 states to 9970 states and 14843 transitions. [2022-07-11 23:57:26,054 INFO L78 Accepts]: Start accepts. Automaton has 9970 states and 14843 transitions. Word has length 640 [2022-07-11 23:57:26,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:26,054 INFO L495 AbstractCegarLoop]: Abstraction has 9970 states and 14843 transitions. [2022-07-11 23:57:26,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 9970 states and 14843 transitions. [2022-07-11 23:57:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-11 23:57:26,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:26,066 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 12, 8, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:57:26,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-07-11 23:57:26,066 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:26,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:26,067 INFO L85 PathProgramCache]: Analyzing trace with hash 819285376, now seen corresponding path program 1 times [2022-07-11 23:57:26,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:26,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654009615] [2022-07-11 23:57:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:26,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3871 backedges. 2015 proven. 0 refuted. 0 times theorem prover too weak. 1856 trivial. 0 not checked. [2022-07-11 23:57:26,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:26,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654009615] [2022-07-11 23:57:26,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654009615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:26,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:26,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:57:26,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595944638] [2022-07-11 23:57:26,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:26,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:57:26,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:57:26,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:57:26,258 INFO L87 Difference]: Start difference. First operand 9970 states and 14843 transitions. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:27,548 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:27,947 INFO L93 Difference]: Finished difference Result 21029 states and 31237 transitions. [2022-07-11 23:57:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:57:27,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 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 [2022-07-11 23:57:27,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:27,959 INFO L225 Difference]: With dead ends: 21029 [2022-07-11 23:57:27,959 INFO L226 Difference]: Without dead ends: 11082 [2022-07-11 23:57:27,967 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 [2022-07-11 23:57:27,968 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 41 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:27,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 619 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-11 23:57:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2022-07-11 23:57:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 10610. [2022-07-11 23:57:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 1.489584315204072) internal successors, (15803), 10609 states have internal predecessors, (15803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 15803 transitions. [2022-07-11 23:57:28,210 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 15803 transitions. Word has length 640 [2022-07-11 23:57:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:28,210 INFO L495 AbstractCegarLoop]: Abstraction has 10610 states and 15803 transitions. [2022-07-11 23:57:28,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:28,210 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 15803 transitions. [2022-07-11 23:57:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-11 23:57:28,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:28,222 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:57:28,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-07-11 23:57:28,222 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:28,223 INFO L85 PathProgramCache]: Analyzing trace with hash 430388367, now seen corresponding path program 1 times [2022-07-11 23:57:28,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:28,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540707754] [2022-07-11 23:57:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:28,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3895 trivial. 0 not checked. [2022-07-11 23:57:29,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540707754] [2022-07-11 23:57:29,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540707754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:57:29,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:57:29,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:57:29,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963744359] [2022-07-11 23:57:29,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:57:29,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:57:29,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:29,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:57:29,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:57:29,296 INFO L87 Difference]: Start difference. First operand 10610 states and 15803 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:57:30,171 INFO L93 Difference]: Finished difference Result 21217 states and 31602 transitions. [2022-07-11 23:57:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:57:30,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 640 [2022-07-11 23:57:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:57:30,182 INFO L225 Difference]: With dead ends: 21217 [2022-07-11 23:57:30,182 INFO L226 Difference]: Without dead ends: 10610 [2022-07-11 23:57:30,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:57:30,190 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 7 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:57:30,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 703 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:57:30,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10610 states. [2022-07-11 23:57:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10610 to 10610. [2022-07-11 23:57:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 1.4894900556131587) internal successors, (15802), 10609 states have internal predecessors, (15802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 15802 transitions. [2022-07-11 23:57:30,457 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 15802 transitions. Word has length 640 [2022-07-11 23:57:30,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:57:30,457 INFO L495 AbstractCegarLoop]: Abstraction has 10610 states and 15802 transitions. [2022-07-11 23:57:30,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:30,457 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 15802 transitions. [2022-07-11 23:57:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2022-07-11 23:57:30,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:57:30,470 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:57:30,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-07-11 23:57:30,470 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:57:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:57:30,471 INFO L85 PathProgramCache]: Analyzing trace with hash -582769715, now seen corresponding path program 1 times [2022-07-11 23:57:30,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:57:30,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529318750] [2022-07-11 23:57:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:30,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:57:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 2142 proven. 1109 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2022-07-11 23:57:32,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:57:32,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529318750] [2022-07-11 23:57:32,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529318750] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:57:32,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081624792] [2022-07-11 23:57:32,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:57:32,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:57:32,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:57:32,148 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:57:32,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 23:57:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:57:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 2728 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-11 23:57:33,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:57:33,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:33,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-07-11 23:57:33,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:33,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:33,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:33,647 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 23:57:33,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 28 treesize of output 10 [2022-07-11 23:57:33,726 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 9 treesize of output 3 [2022-07-11 23:57:33,841 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 [2022-07-11 23:57:34,106 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 [2022-07-11 23:57:34,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:34,170 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 [2022-07-11 23:57:34,191 INFO L356 Elim1Store]: treesize reduction 72, result has 40.0 percent of original size [2022-07-11 23:57:34,191 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 [2022-07-11 23:57:34,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:34,195 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 85 treesize of output 72 [2022-07-11 23:57:34,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:34,719 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 64 treesize of output 57 [2022-07-11 23:57:34,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:34,723 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 64 treesize of output 57 [2022-07-11 23:57:34,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:34,741 INFO L356 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2022-07-11 23:57:34,741 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 [2022-07-11 23:57:34,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:34,795 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 [2022-07-11 23:57:34,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:34,816 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-11 23:57:34,816 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 [2022-07-11 23:57:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:34,820 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 [2022-07-11 23:57:35,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,413 INFO L356 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2022-07-11 23:57:35,413 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 [2022-07-11 23:57:35,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:35,443 INFO L356 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-07-11 23:57:35,443 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 [2022-07-11 23:57:35,489 INFO L356 Elim1Store]: treesize reduction 45, result has 52.6 percent of original size [2022-07-11 23:57:35,489 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 [2022-07-11 23:57:36,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,636 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 395 treesize of output 317 [2022-07-11 23:57:36,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,675 INFO L356 Elim1Store]: treesize reduction 148, result has 30.2 percent of original size [2022-07-11 23:57:36,675 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 2 case distinctions, treesize of input 395 treesize of output 408 [2022-07-11 23:57:36,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:36,688 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 23:57:36,688 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 1 case distinctions, treesize of input 423 treesize of output 339 [2022-07-11 23:57:45,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,403 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 390 treesize of output 308 [2022-07-11 23:57:45,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,424 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 390 treesize of output 308 [2022-07-11 23:57:45,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,458 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-11 23:57:45,459 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 390 treesize of output 378 [2022-07-11 23:57:45,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,743 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 139 treesize of output 97 [2022-07-11 23:57:45,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,747 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 97 treesize of output 61 [2022-07-11 23:57:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,776 INFO L356 Elim1Store]: treesize reduction 89, result has 25.2 percent of original size [2022-07-11 23:57:45,777 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 5 case distinctions, treesize of input 80 treesize of output 87 [2022-07-11 23:57:45,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:57:45,833 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 23:57:45,833 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 1 case distinctions, treesize of input 33 treesize of output 35 [2022-07-11 23:57:46,019 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 23:57:46,019 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 1 case distinctions, treesize of input 23 treesize of output 11 [2022-07-11 23:57:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1540 proven. 545 refuted. 0 times theorem prover too weak. 1810 trivial. 0 not checked. [2022-07-11 23:57:46,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:57:48,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:57:48,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:57:48,896 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 262 treesize of output 202 [2022-07-11 23:57:48,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:57:48,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:57:48,899 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 214 treesize of output 154 [2022-07-11 23:57:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1689 proven. 141 refuted. 0 times theorem prover too weak. 2065 trivial. 0 not checked. [2022-07-11 23:57:51,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081624792] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:57:51,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:57:51,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 13] total 47 [2022-07-11 23:57:51,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798665667] [2022-07-11 23:57:51,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:57:51,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-11 23:57:51,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:57:51,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-11 23:57:51,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2022-07-11 23:57:51,102 INFO L87 Difference]: Start difference. First operand 10610 states and 15802 transitions. Second operand has 47 states, 47 states have (on average 17.404255319148938) internal successors, (818), 47 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:57:52,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:55,346 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:57:58,823 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:59:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:59:04,917 INFO L93 Difference]: Finished difference Result 178069 states and 255815 transitions. [2022-07-11 23:59:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 467 states. [2022-07-11 23:59:04,918 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 17.404255319148938) internal successors, (818), 47 states have internal predecessors, (818), 0 states have call successors, (0), 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 [2022-07-11 23:59:04,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:59:05,271 INFO L225 Difference]: With dead ends: 178069 [2022-07-11 23:59:05,272 INFO L226 Difference]: Without dead ends: 167482 [2022-07-11 23:59:05,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2099 GetRequests, 1561 SyntacticMatches, 29 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118532 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=26573, Invalid=234037, Unknown=0, NotChecked=0, Total=260610 [2022-07-11 23:59:05,324 INFO L413 NwaCegarLoop]: 1347 mSDtfsCounter, 10948 mSDsluCounter, 26715 mSDsCounter, 0 mSdLazyCounter, 26827 mSolverCounterSat, 2484 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10948 SdHoareTripleChecker+Valid, 28062 SdHoareTripleChecker+Invalid, 36617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2484 IncrementalHoareTripleChecker+Valid, 26827 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 7305 IncrementalHoareTripleChecker+Unchecked, 36.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:59:05,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10948 Valid, 28062 Invalid, 36617 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2484 Valid, 26827 Invalid, 1 Unknown, 7305 Unchecked, 36.9s Time] [2022-07-11 23:59:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167482 states. [2022-07-11 23:59:09,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167482 to 98222. [2022-07-11 23:59:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98222 states, 98221 states have (on average 1.4891112898463668) internal successors, (146262), 98221 states have internal predecessors, (146262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:59:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98222 states to 98222 states and 146262 transitions. [2022-07-11 23:59:09,384 INFO L78 Accepts]: Start accepts. Automaton has 98222 states and 146262 transitions. Word has length 640 [2022-07-11 23:59:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:59:09,385 INFO L495 AbstractCegarLoop]: Abstraction has 98222 states and 146262 transitions. [2022-07-11 23:59:09,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 17.404255319148938) internal successors, (818), 47 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:59:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 98222 states and 146262 transitions. [2022-07-11 23:59:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2022-07-11 23:59:09,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:59:09,507 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:59:09,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:59:09,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:59:09,708 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:59:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:59:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1543686213, now seen corresponding path program 1 times [2022-07-11 23:59:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:59:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330185905] [2022-07-11 23:59:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:59:09,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:59:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:59:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1586 proven. 277 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-07-11 23:59:10,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:59:10,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330185905] [2022-07-11 23:59:10,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330185905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:59:10,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338097260] [2022-07-11 23:59:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:59:10,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:59:10,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:59:10,908 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:59:10,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 23:59:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:59:12,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 2761 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-11 23:59:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:59:12,503 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 [2022-07-11 23:59:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:59:12,638 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 36 treesize of output 35 [2022-07-11 23:59:12,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:59:12,642 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 36 treesize of output 35 [2022-07-11 23:59:12,662 INFO L356 Elim1Store]: treesize reduction 102, result has 34.2 percent of original size [2022-07-11 23:59:12,663 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 45 treesize of output 69 [2022-07-11 23:59:12,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:59:12,946 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 [2022-07-11 23:59:12,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:59:12,966 INFO L356 Elim1Store]: treesize reduction 77, result has 35.8 percent of original size [2022-07-11 23:59:12,967 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 67 treesize of output 91 [2022-07-11 23:59:12,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:59:12,976 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 83 treesize of output 70 [2022-07-11 23:59:12,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:59:12,994 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 [2022-07-11 23:59:12,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:59:12,997 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 [2022-07-11 23:59:13,014 INFO L356 Elim1Store]: treesize reduction 75, result has 37.5 percent of original size [2022-07-11 23:59:13,014 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 67 treesize of output 83 [2022-07-11 23:59:13,054 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 89 treesize of output 65 [2022-07-11 23:59:13,056 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 65 treesize of output 41 [2022-07-11 23:59:15,131 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 0 case distinctions, treesize of input 29 treesize of output 13 [2022-07-11 23:59:15,167 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 [2022-07-11 23:59:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1997 proven. 87 refuted. 0 times theorem prover too weak. 1811 trivial. 0 not checked. [2022-07-11 23:59:15,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:59:16,043 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 32 treesize of output 20 [2022-07-11 23:59:16,046 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 28 treesize of output 16 [2022-07-11 23:59:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3895 backedges. 1997 proven. 62 refuted. 0 times theorem prover too weak. 1836 trivial. 0 not checked. [2022-07-11 23:59:16,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338097260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:59:16,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:59:16,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 30 [2022-07-11 23:59:16,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137075558] [2022-07-11 23:59:16,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:59:16,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-11 23:59:16,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:59:16,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-11 23:59:16,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-07-11 23:59:16,056 INFO L87 Difference]: Start difference. First operand 98222 states and 146262 transitions. Second operand has 30 states, 30 states have (on average 17.433333333333334) internal successors, (523), 30 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:59:20,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:59:22,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:59:25,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []