./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.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.12.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6fed4ea6707efb0c46113b7defb1e72bb9bbe71f593886f20a58e457577f3a05 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:53:56,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:53:56,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:53:56,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:53:56,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:53:56,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:53:56,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:53:56,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:53:56,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:53:56,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:53:56,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:53:56,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:53:56,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:53:56,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:53:56,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:53:56,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:53:56,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:53:56,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:53:56,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:53:56,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:53:56,922 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:53:56,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:53:56,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:53:56,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:53:56,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:53:56,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:53:56,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:53:56,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:53:56,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:53:56,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:53:56,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:53:56,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:53:56,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:53:56,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:53:56,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:53:56,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:53:56,935 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:53:56,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:53:56,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:53:56,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:53:56,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:53:56,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:53:56,938 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:53:56,965 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:53:56,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:53:56,965 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:53:56,966 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:53:56,966 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:53:56,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:53:56,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:53:56,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:53:56,967 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:53:56,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:53:56,968 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:53:56,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:53:56,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:53:56,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:53:56,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:53:56,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:53:56,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:53:56,969 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:53:56,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:53:56,969 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:53:56,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:53:56,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:53:56,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:53:56,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:53:56,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:53:56,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:53:56,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:53:56,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:53:56,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:53:56,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:53:56,972 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:53:56,972 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:53:56,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:53:56,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fed4ea6707efb0c46113b7defb1e72bb9bbe71f593886f20a58e457577f3a05 [2022-07-11 23:53:57,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:53:57,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:53:57,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:53:57,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:53:57,209 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:53:57,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c [2022-07-11 23:53:57,265 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eadfa4a0f/483e4e5f59f6495dafbe22b9c7d4d5d5/FLAGfb3cfdfc8 [2022-07-11 23:53:57,667 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:53:57,668 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c [2022-07-11 23:53:57,680 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eadfa4a0f/483e4e5f59f6495dafbe22b9c7d4d5d5/FLAGfb3cfdfc8 [2022-07-11 23:53:57,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eadfa4a0f/483e4e5f59f6495dafbe22b9c7d4d5d5 [2022-07-11 23:53:57,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:53:57,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:53:57,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:53:57,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:53:57,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:53:57,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:53:57" (1/1) ... [2022-07-11 23:53:57,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11eb8465 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:57, skipping insertion in model container [2022-07-11 23:53:57,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:53:57" (1/1) ... [2022-07-11 23:53:57,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:53:57,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:53:58,033 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.12.i.cil-1.c[75166,75179] [2022-07-11 23:53:58,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:53:58,055 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:53:58,180 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.12.i.cil-1.c[75166,75179] [2022-07-11 23:53:58,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:53:58,198 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:53:58,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58 WrapperNode [2022-07-11 23:53:58,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:53:58,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:53:58,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:53:58,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:53:58,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58" (1/1) ... [2022-07-11 23:53:58,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58" (1/1) ... [2022-07-11 23:53:58,288 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 797 [2022-07-11 23:53:58,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:53:58,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:53:58,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:53:58,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:53:58,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58" (1/1) ... [2022-07-11 23:53:58,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58" (1/1) ... [2022-07-11 23:53:58,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58" (1/1) ... [2022-07-11 23:53:58,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58" (1/1) ... [2022-07-11 23:53:58,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58" (1/1) ... [2022-07-11 23:53:58,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58" (1/1) ... [2022-07-11 23:53:58,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58" (1/1) ... [2022-07-11 23:53:58,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:53:58,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:53:58,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:53:58,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:53:58,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58" (1/1) ... [2022-07-11 23:53:58,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:53:58,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:53:58,374 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 23:53:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:53:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-11 23:53:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:53:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:53:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-11 23:53:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:53:58,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:53:58,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:53:58,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:53:58,395 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 23:53:58,516 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:53:58,517 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:53:58,534 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:54:00,820 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-11 23:54:00,820 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-11 23:54:00,821 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:54:00,825 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:54:00,826 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-11 23:54:00,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:54:00 BoogieIcfgContainer [2022-07-11 23:54:00,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:54:00,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:54:00,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:54:00,831 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:54:00,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:53:57" (1/3) ... [2022-07-11 23:54:00,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e936432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:54:00, skipping insertion in model container [2022-07-11 23:54:00,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:53:58" (2/3) ... [2022-07-11 23:54:00,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e936432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:54:00, skipping insertion in model container [2022-07-11 23:54:00,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:54:00" (3/3) ... [2022-07-11 23:54:00,833 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.12.i.cil-1.c [2022-07-11 23:54:00,843 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:54:00,843 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:54:00,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:54:00,880 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@23653177, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@56989151 [2022-07-11 23:54:00,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:54:00,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 150 states have (on average 1.72) internal successors, (258), 151 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 23:54:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 23:54:00,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:00,891 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] [2022-07-11 23:54:00,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:00,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1692197635, now seen corresponding path program 1 times [2022-07-11 23:54:00,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:00,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352043647] [2022-07-11 23:54:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:00,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:01,335 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 23:54:01,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:01,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352043647] [2022-07-11 23:54:01,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352043647] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:01,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:01,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:01,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967428300] [2022-07-11 23:54:01,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:01,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:01,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:01,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:01,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:01,375 INFO L87 Difference]: Start difference. First operand has 152 states, 150 states have (on average 1.72) internal successors, (258), 151 states have internal predecessors, (258), 0 states have call successors, (0), 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 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 23:54:02,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:02,250 INFO L93 Difference]: Finished difference Result 428 states and 730 transitions. [2022-07-11 23:54:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-07-11 23:54:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:02,268 INFO L225 Difference]: With dead ends: 428 [2022-07-11 23:54:02,268 INFO L226 Difference]: Without dead ends: 261 [2022-07-11 23:54:02,272 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 23:54:02,275 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 162 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:02,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 453 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:54:02,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-07-11 23:54:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2022-07-11 23:54:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.6123595505617978) internal successors, (287), 178 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 23:54:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 287 transitions. [2022-07-11 23:54:02,317 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 287 transitions. Word has length 43 [2022-07-11 23:54:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:02,318 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 287 transitions. [2022-07-11 23:54:02,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 23:54:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 287 transitions. [2022-07-11 23:54:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 23:54:02,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:02,320 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] [2022-07-11 23:54:02,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:54:02,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash 910735618, now seen corresponding path program 1 times [2022-07-11 23:54:02,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:02,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192084241] [2022-07-11 23:54:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:02,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:02,458 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 23:54:02,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:02,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192084241] [2022-07-11 23:54:02,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192084241] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:02,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:02,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:02,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75308226] [2022-07-11 23:54:02,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:02,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:02,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:02,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:02,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:02,461 INFO L87 Difference]: Start difference. First operand 179 states and 287 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:03,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:03,162 INFO L93 Difference]: Finished difference Result 376 states and 601 transitions. [2022-07-11 23:54:03,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:03,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-11 23:54:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:03,164 INFO L225 Difference]: With dead ends: 376 [2022-07-11 23:54:03,164 INFO L226 Difference]: Without dead ends: 207 [2022-07-11 23:54:03,164 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 23:54:03,165 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 22 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:03,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 481 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:54:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-11 23:54:03,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 190. [2022-07-11 23:54:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.619047619047619) internal successors, (306), 189 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 23:54:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 306 transitions. [2022-07-11 23:54:03,174 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 306 transitions. Word has length 44 [2022-07-11 23:54:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:03,175 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 306 transitions. [2022-07-11 23:54:03,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 306 transitions. [2022-07-11 23:54:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-11 23:54:03,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:03,177 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] [2022-07-11 23:54:03,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:54:03,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:03,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:03,178 INFO L85 PathProgramCache]: Analyzing trace with hash -574802552, now seen corresponding path program 1 times [2022-07-11 23:54:03,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:03,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907196986] [2022-07-11 23:54:03,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:03,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:03,267 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 23:54:03,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:03,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907196986] [2022-07-11 23:54:03,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907196986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:03,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:03,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:03,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207590779] [2022-07-11 23:54:03,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:03,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:03,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:03,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:03,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:03,270 INFO L87 Difference]: Start difference. First operand 190 states and 306 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:04,483 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:04,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:04,819 INFO L93 Difference]: Finished difference Result 519 states and 841 transitions. [2022-07-11 23:54:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:04,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-11 23:54:04,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:04,821 INFO L225 Difference]: With dead ends: 519 [2022-07-11 23:54:04,821 INFO L226 Difference]: Without dead ends: 350 [2022-07-11 23:54:04,822 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 23:54:04,822 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 151 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:04,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 642 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-11 23:54:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-07-11 23:54:04,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 222. [2022-07-11 23:54:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.6153846153846154) internal successors, (357), 221 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 23:54:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 357 transitions. [2022-07-11 23:54:04,832 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 357 transitions. Word has length 57 [2022-07-11 23:54:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:04,832 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 357 transitions. [2022-07-11 23:54:04,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 357 transitions. [2022-07-11 23:54:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:54:04,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:04,834 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] [2022-07-11 23:54:04,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 23:54:04,834 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash -800730793, now seen corresponding path program 1 times [2022-07-11 23:54:04,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:04,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843753518] [2022-07-11 23:54:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:04,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:04,915 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 23:54:04,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:04,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843753518] [2022-07-11 23:54:04,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843753518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:04,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:04,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:04,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98551194] [2022-07-11 23:54:04,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:04,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:04,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:04,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:04,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:04,917 INFO L87 Difference]: Start difference. First operand 222 states and 357 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:06,928 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 23:54:07,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:07,294 INFO L93 Difference]: Finished difference Result 527 states and 844 transitions. [2022-07-11 23:54:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:07,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-11 23:54:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:07,296 INFO L225 Difference]: With dead ends: 527 [2022-07-11 23:54:07,296 INFO L226 Difference]: Without dead ends: 326 [2022-07-11 23:54:07,297 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 23:54:07,297 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 156 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:07,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 346 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-11 23:54:07,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-11 23:54:07,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 222. [2022-07-11 23:54:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.5972850678733033) internal successors, (353), 221 states have internal predecessors, (353), 0 states have call successors, (0), 0 states 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 23:54:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 353 transitions. [2022-07-11 23:54:07,305 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 353 transitions. Word has length 58 [2022-07-11 23:54:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:07,305 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 353 transitions. [2022-07-11 23:54:07,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 353 transitions. [2022-07-11 23:54:07,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:54:07,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:07,307 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] [2022-07-11 23:54:07,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 23:54:07,307 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:07,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:07,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1848241597, now seen corresponding path program 1 times [2022-07-11 23:54:07,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:07,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40154004] [2022-07-11 23:54:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:07,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:07,397 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 23:54:07,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:07,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40154004] [2022-07-11 23:54:07,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40154004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:07,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:07,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:07,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104252929] [2022-07-11 23:54:07,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:07,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:07,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:07,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:07,399 INFO L87 Difference]: Start difference. First operand 222 states and 353 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:09,411 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 23:54:09,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:09,604 INFO L93 Difference]: Finished difference Result 439 states and 695 transitions. [2022-07-11 23:54:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:09,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-11 23:54:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:09,605 INFO L225 Difference]: With dead ends: 439 [2022-07-11 23:54:09,605 INFO L226 Difference]: Without dead ends: 238 [2022-07-11 23:54:09,606 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 23:54:09,606 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 26 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:09,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 485 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:54:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-11 23:54:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 222. [2022-07-11 23:54:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.592760180995475) internal successors, (352), 221 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 23:54:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 352 transitions. [2022-07-11 23:54:09,611 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 352 transitions. Word has length 58 [2022-07-11 23:54:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:09,611 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 352 transitions. [2022-07-11 23:54:09,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 352 transitions. [2022-07-11 23:54:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:54:09,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:09,612 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] [2022-07-11 23:54:09,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 23:54:09,613 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:09,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1310859404, now seen corresponding path program 1 times [2022-07-11 23:54:09,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:09,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160467773] [2022-07-11 23:54:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:09,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:09,740 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 23:54:09,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:09,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160467773] [2022-07-11 23:54:09,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160467773] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:09,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:09,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:09,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607879887] [2022-07-11 23:54:09,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:09,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:09,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:09,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:09,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:09,743 INFO L87 Difference]: Start difference. First operand 222 states and 352 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:10,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:10,782 INFO L93 Difference]: Finished difference Result 438 states and 693 transitions. [2022-07-11 23:54:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:10,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-11 23:54:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:10,784 INFO L225 Difference]: With dead ends: 438 [2022-07-11 23:54:10,784 INFO L226 Difference]: Without dead ends: 237 [2022-07-11 23:54:10,785 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 23:54:10,785 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 19 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:10,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 487 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 23:54:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-07-11 23:54:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 222. [2022-07-11 23:54:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.588235294117647) internal successors, (351), 221 states have internal predecessors, (351), 0 states have call successors, (0), 0 states 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 23:54:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 351 transitions. [2022-07-11 23:54:10,790 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 351 transitions. Word has length 58 [2022-07-11 23:54:10,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:10,790 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 351 transitions. [2022-07-11 23:54:10,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 351 transitions. [2022-07-11 23:54:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:54:10,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:10,792 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] [2022-07-11 23:54:10,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 23:54:10,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:10,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:10,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1663254580, now seen corresponding path program 1 times [2022-07-11 23:54:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:10,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781463761] [2022-07-11 23:54:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:10,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:10,890 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 23:54:10,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:10,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781463761] [2022-07-11 23:54:10,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781463761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:10,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:10,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:10,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263126697] [2022-07-11 23:54:10,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:10,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:10,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:10,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:10,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:10,893 INFO L87 Difference]: Start difference. First operand 222 states and 351 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:12,898 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 23:54:13,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:13,199 INFO L93 Difference]: Finished difference Result 527 states and 835 transitions. [2022-07-11 23:54:13,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:13,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-11 23:54:13,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:13,201 INFO L225 Difference]: With dead ends: 527 [2022-07-11 23:54:13,201 INFO L226 Difference]: Without dead ends: 326 [2022-07-11 23:54:13,201 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 23:54:13,202 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 149 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:13,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 346 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:54:13,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-11 23:54:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 223. [2022-07-11 23:54:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.5765765765765767) internal successors, (350), 222 states have internal predecessors, (350), 0 states have call successors, (0), 0 states 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 23:54:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 350 transitions. [2022-07-11 23:54:13,207 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 350 transitions. Word has length 58 [2022-07-11 23:54:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:13,207 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 350 transitions. [2022-07-11 23:54:13,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 350 transitions. [2022-07-11 23:54:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 23:54:13,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:13,208 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] [2022-07-11 23:54:13,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:54:13,208 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:13,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:13,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1134870975, now seen corresponding path program 1 times [2022-07-11 23:54:13,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:13,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954051991] [2022-07-11 23:54:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:13,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:13,280 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 23:54:13,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:13,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954051991] [2022-07-11 23:54:13,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954051991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:13,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:13,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:13,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454389665] [2022-07-11 23:54:13,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:13,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:13,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:13,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:13,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:13,283 INFO L87 Difference]: Start difference. First operand 223 states and 350 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:54:14,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:14,267 INFO L93 Difference]: Finished difference Result 438 states and 689 transitions. [2022-07-11 23:54:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:14,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2022-07-11 23:54:14,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:14,269 INFO L225 Difference]: With dead ends: 438 [2022-07-11 23:54:14,269 INFO L226 Difference]: Without dead ends: 236 [2022-07-11 23:54:14,269 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 23:54:14,270 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 22 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:14,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 491 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 23:54:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-11 23:54:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 223. [2022-07-11 23:54:14,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.572072072072072) internal successors, (349), 222 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 23:54:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 349 transitions. [2022-07-11 23:54:14,274 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 349 transitions. Word has length 59 [2022-07-11 23:54:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:14,275 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 349 transitions. [2022-07-11 23:54:14,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states 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 23:54:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 349 transitions. [2022-07-11 23:54:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:54:14,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:14,275 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] [2022-07-11 23:54:14,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-11 23:54:14,275 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:14,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:14,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1795278302, now seen corresponding path program 1 times [2022-07-11 23:54:14,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:14,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603980463] [2022-07-11 23:54:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:14,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:14,372 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 23:54:14,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:14,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603980463] [2022-07-11 23:54:14,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603980463] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:14,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:14,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:14,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770399466] [2022-07-11 23:54:14,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:14,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:14,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:14,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:14,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:14,375 INFO L87 Difference]: Start difference. First operand 223 states and 349 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 23:54:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:14,890 INFO L93 Difference]: Finished difference Result 438 states and 688 transitions. [2022-07-11 23:54:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:14,891 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 23:54:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:14,892 INFO L225 Difference]: With dead ends: 438 [2022-07-11 23:54:14,892 INFO L226 Difference]: Without dead ends: 236 [2022-07-11 23:54:14,892 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 23:54:14,893 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 20 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:14,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 491 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:14,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-11 23:54:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 223. [2022-07-11 23:54:14,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.5675675675675675) internal successors, (348), 222 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 23:54:14,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 348 transitions. [2022-07-11 23:54:14,897 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 348 transitions. Word has length 60 [2022-07-11 23:54:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:14,897 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 348 transitions. [2022-07-11 23:54:14,897 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 23:54:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 348 transitions. [2022-07-11 23:54:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 23:54:14,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:14,898 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] [2022-07-11 23:54:14,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:54:14,898 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash -828700230, now seen corresponding path program 1 times [2022-07-11 23:54:14,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:14,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269247283] [2022-07-11 23:54:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:14,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:14,968 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 23:54:14,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:14,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269247283] [2022-07-11 23:54:14,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269247283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:14,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:14,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:14,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357265548] [2022-07-11 23:54:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:14,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:14,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:14,970 INFO L87 Difference]: Start difference. First operand 223 states and 348 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 23:54:16,494 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 23:54:16,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:16,643 INFO L93 Difference]: Finished difference Result 428 states and 674 transitions. [2022-07-11 23:54:16,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:16,644 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 23:54:16,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:16,645 INFO L225 Difference]: With dead ends: 428 [2022-07-11 23:54:16,645 INFO L226 Difference]: Without dead ends: 226 [2022-07-11 23:54:16,645 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 23:54:16,646 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 11 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:16,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 505 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-11 23:54:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-07-11 23:54:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2022-07-11 23:54:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.563063063063063) internal successors, (347), 222 states have internal predecessors, (347), 0 states have call successors, (0), 0 states 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 23:54:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 347 transitions. [2022-07-11 23:54:16,651 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 347 transitions. Word has length 61 [2022-07-11 23:54:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:16,651 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 347 transitions. [2022-07-11 23:54:16,651 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 23:54:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 347 transitions. [2022-07-11 23:54:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 23:54:16,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:16,652 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] [2022-07-11 23:54:16,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:54:16,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:16,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:16,652 INFO L85 PathProgramCache]: Analyzing trace with hash -155701422, now seen corresponding path program 1 times [2022-07-11 23:54:16,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:16,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995865314] [2022-07-11 23:54:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:16,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:16,757 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 23:54:16,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:16,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995865314] [2022-07-11 23:54:16,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995865314] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:16,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:16,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:16,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424719190] [2022-07-11 23:54:16,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:16,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:16,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:16,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:16,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:16,759 INFO L87 Difference]: Start difference. First operand 223 states and 347 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 23:54:18,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:18,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:18,381 INFO L93 Difference]: Finished difference Result 465 states and 729 transitions. [2022-07-11 23:54:18,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:18,382 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 23:54:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:18,383 INFO L225 Difference]: With dead ends: 465 [2022-07-11 23:54:18,383 INFO L226 Difference]: Without dead ends: 263 [2022-07-11 23:54:18,383 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 23:54:18,383 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 31 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:18,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 509 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:54:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-11 23:54:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 245. [2022-07-11 23:54:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.5655737704918034) internal successors, (382), 244 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 23:54:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 382 transitions. [2022-07-11 23:54:18,388 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 382 transitions. Word has length 61 [2022-07-11 23:54:18,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:18,388 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 382 transitions. [2022-07-11 23:54:18,388 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 23:54:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 382 transitions. [2022-07-11 23:54:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-11 23:54:18,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:18,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:18,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 23:54:18,389 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1685046125, now seen corresponding path program 1 times [2022-07-11 23:54:18,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:18,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243029986] [2022-07-11 23:54:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:18,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:18,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:18,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243029986] [2022-07-11 23:54:18,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243029986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:18,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:18,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:18,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2501322] [2022-07-11 23:54:18,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:18,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:18,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:18,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:18,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:18,469 INFO L87 Difference]: Start difference. First operand 245 states and 382 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 23:54:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:19,048 INFO L93 Difference]: Finished difference Result 572 states and 899 transitions. [2022-07-11 23:54:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:19,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2022-07-11 23:54:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:19,050 INFO L225 Difference]: With dead ends: 572 [2022-07-11 23:54:19,050 INFO L226 Difference]: Without dead ends: 348 [2022-07-11 23:54:19,050 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 23:54:19,050 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 154 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:19,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 346 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:54:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-11 23:54:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 245. [2022-07-11 23:54:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.5491803278688525) internal successors, (378), 244 states have internal predecessors, (378), 0 states have call successors, (0), 0 states 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 23:54:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 378 transitions. [2022-07-11 23:54:19,056 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 378 transitions. Word has length 75 [2022-07-11 23:54:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:19,056 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 378 transitions. [2022-07-11 23:54:19,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 23:54:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 378 transitions. [2022-07-11 23:54:19,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-11 23:54:19,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:19,057 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:19,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-11 23:54:19,057 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:19,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1474054876, now seen corresponding path program 1 times [2022-07-11 23:54:19,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:19,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465918682] [2022-07-11 23:54:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:19,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:19,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:19,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465918682] [2022-07-11 23:54:19,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465918682] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:19,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:19,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:19,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041813869] [2022-07-11 23:54:19,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:19,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:19,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:19,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:19,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:19,169 INFO L87 Difference]: Start difference. First operand 245 states and 378 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 23:54:19,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:19,652 INFO L93 Difference]: Finished difference Result 486 states and 754 transitions. [2022-07-11 23:54:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:19,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2022-07-11 23:54:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:19,654 INFO L225 Difference]: With dead ends: 486 [2022-07-11 23:54:19,654 INFO L226 Difference]: Without dead ends: 262 [2022-07-11 23:54:19,654 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 23:54:19,655 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 33 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:19,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 511 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:19,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-11 23:54:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 245. [2022-07-11 23:54:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.5450819672131149) internal successors, (377), 244 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 23:54:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 377 transitions. [2022-07-11 23:54:19,660 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 377 transitions. Word has length 75 [2022-07-11 23:54:19,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:19,660 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 377 transitions. [2022-07-11 23:54:19,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 23:54:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 377 transitions. [2022-07-11 23:54:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-11 23:54:19,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:19,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:19,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 23:54:19,661 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:19,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1898963311, now seen corresponding path program 1 times [2022-07-11 23:54:19,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:19,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900974359] [2022-07-11 23:54:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:19,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:19,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:19,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900974359] [2022-07-11 23:54:19,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900974359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:19,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:19,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:19,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209368107] [2022-07-11 23:54:19,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:19,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:19,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:19,747 INFO L87 Difference]: Start difference. First operand 245 states and 377 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:20,401 INFO L93 Difference]: Finished difference Result 572 states and 889 transitions. [2022-07-11 23:54:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:20,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-11 23:54:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:20,403 INFO L225 Difference]: With dead ends: 572 [2022-07-11 23:54:20,403 INFO L226 Difference]: Without dead ends: 348 [2022-07-11 23:54:20,404 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 23:54:20,404 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 152 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:20,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 346 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:54:20,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-11 23:54:20,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 245. [2022-07-11 23:54:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.528688524590164) internal successors, (373), 244 states have internal predecessors, (373), 0 states have call successors, (0), 0 states 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 23:54:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 373 transitions. [2022-07-11 23:54:20,409 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 373 transitions. Word has length 76 [2022-07-11 23:54:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:20,410 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 373 transitions. [2022-07-11 23:54:20,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 373 transitions. [2022-07-11 23:54:20,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-11 23:54:20,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:20,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:20,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-11 23:54:20,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:20,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:20,411 INFO L85 PathProgramCache]: Analyzing trace with hash -287663058, now seen corresponding path program 1 times [2022-07-11 23:54:20,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:20,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731660661] [2022-07-11 23:54:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:20,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:20,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:20,551 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:20,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:20,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731660661] [2022-07-11 23:54:20,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731660661] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:20,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:20,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:20,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225531913] [2022-07-11 23:54:20,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:20,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:20,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:20,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:20,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:20,553 INFO L87 Difference]: Start difference. First operand 245 states and 373 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:22,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:22,311 INFO L93 Difference]: Finished difference Result 572 states and 881 transitions. [2022-07-11 23:54:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:22,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-11 23:54:22,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:22,312 INFO L225 Difference]: With dead ends: 572 [2022-07-11 23:54:22,312 INFO L226 Difference]: Without dead ends: 348 [2022-07-11 23:54:22,313 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 23:54:22,313 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 150 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:22,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 346 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-11 23:54:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-11 23:54:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 245. [2022-07-11 23:54:22,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.5122950819672132) internal successors, (369), 244 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 23:54:22,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 369 transitions. [2022-07-11 23:54:22,318 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 369 transitions. Word has length 77 [2022-07-11 23:54:22,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:22,319 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 369 transitions. [2022-07-11 23:54:22,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:22,319 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 369 transitions. [2022-07-11 23:54:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-11 23:54:22,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:22,319 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:22,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-11 23:54:22,320 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:22,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:22,320 INFO L85 PathProgramCache]: Analyzing trace with hash -975372950, now seen corresponding path program 1 times [2022-07-11 23:54:22,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:22,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901739290] [2022-07-11 23:54:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:22,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:22,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:22,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901739290] [2022-07-11 23:54:22,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901739290] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:22,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:22,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:22,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885157957] [2022-07-11 23:54:22,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:22,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:22,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:22,392 INFO L87 Difference]: Start difference. First operand 245 states and 369 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:22,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:22,878 INFO L93 Difference]: Finished difference Result 562 states and 860 transitions. [2022-07-11 23:54:22,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:22,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-07-11 23:54:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:22,880 INFO L225 Difference]: With dead ends: 562 [2022-07-11 23:54:22,880 INFO L226 Difference]: Without dead ends: 338 [2022-07-11 23:54:22,880 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 23:54:22,881 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 141 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:22,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 366 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-11 23:54:22,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 245. [2022-07-11 23:54:22,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.4959016393442623) internal successors, (365), 244 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 365 transitions. [2022-07-11 23:54:22,886 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 365 transitions. Word has length 78 [2022-07-11 23:54:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:22,886 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 365 transitions. [2022-07-11 23:54:22,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 365 transitions. [2022-07-11 23:54:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-11 23:54:22,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:22,887 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:22,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-11 23:54:22,887 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:22,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:22,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1326691021, now seen corresponding path program 1 times [2022-07-11 23:54:22,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:22,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477871267] [2022-07-11 23:54:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:22,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:22,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:22,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477871267] [2022-07-11 23:54:22,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477871267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:22,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:22,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:22,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986023119] [2022-07-11 23:54:22,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:22,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:22,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:22,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:22,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:22,989 INFO L87 Difference]: Start difference. First operand 245 states and 365 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 23:54:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:23,825 INFO L93 Difference]: Finished difference Result 562 states and 852 transitions. [2022-07-11 23:54:23,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:23,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 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 83 [2022-07-11 23:54:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:23,827 INFO L225 Difference]: With dead ends: 562 [2022-07-11 23:54:23,827 INFO L226 Difference]: Without dead ends: 338 [2022-07-11 23:54:23,827 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 23:54:23,827 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 115 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:23,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 380 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:54:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-07-11 23:54:23,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 268. [2022-07-11 23:54:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.5355805243445693) internal successors, (410), 267 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 23:54:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 410 transitions. [2022-07-11 23:54:23,832 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 410 transitions. Word has length 83 [2022-07-11 23:54:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:23,832 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 410 transitions. [2022-07-11 23:54:23,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 23:54:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 410 transitions. [2022-07-11 23:54:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-11 23:54:23,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:23,834 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:23,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-11 23:54:23,834 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:23,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2060820195, now seen corresponding path program 1 times [2022-07-11 23:54:23,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:23,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678162641] [2022-07-11 23:54:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:23,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:23,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:23,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:23,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678162641] [2022-07-11 23:54:23,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678162641] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:23,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:23,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:23,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597970181] [2022-07-11 23:54:23,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:23,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:23,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:23,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:23,911 INFO L87 Difference]: Start difference. First operand 268 states and 410 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:24,410 INFO L93 Difference]: Finished difference Result 602 states and 928 transitions. [2022-07-11 23:54:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:24,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-11 23:54:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:24,411 INFO L225 Difference]: With dead ends: 602 [2022-07-11 23:54:24,411 INFO L226 Difference]: Without dead ends: 355 [2022-07-11 23:54:24,412 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 23:54:24,412 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 84 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:24,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 487 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-11 23:54:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 302. [2022-07-11 23:54:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.5382059800664452) internal successors, (463), 301 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 23:54:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 463 transitions. [2022-07-11 23:54:24,418 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 463 transitions. Word has length 111 [2022-07-11 23:54:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:24,418 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 463 transitions. [2022-07-11 23:54:24,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 463 transitions. [2022-07-11 23:54:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-11 23:54:24,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:24,419 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:24,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-11 23:54:24,419 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:24,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1280206943, now seen corresponding path program 1 times [2022-07-11 23:54:24,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:24,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395612017] [2022-07-11 23:54:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:24,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:24,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:24,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395612017] [2022-07-11 23:54:24,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395612017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:24,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:24,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:24,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127634997] [2022-07-11 23:54:24,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:24,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:24,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:24,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:24,539 INFO L87 Difference]: Start difference. First operand 302 states and 463 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:26,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:26,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:26,745 INFO L93 Difference]: Finished difference Result 729 states and 1130 transitions. [2022-07-11 23:54:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:26,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-11 23:54:26,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:26,747 INFO L225 Difference]: With dead ends: 729 [2022-07-11 23:54:26,747 INFO L226 Difference]: Without dead ends: 448 [2022-07-11 23:54:26,748 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 23:54:26,748 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 121 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:26,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 376 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:54:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-07-11 23:54:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 332. [2022-07-11 23:54:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.5468277945619335) internal successors, (512), 331 states have internal predecessors, (512), 0 states have call successors, (0), 0 states 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 23:54:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 512 transitions. [2022-07-11 23:54:26,755 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 512 transitions. Word has length 111 [2022-07-11 23:54:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:26,755 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 512 transitions. [2022-07-11 23:54:26,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 512 transitions. [2022-07-11 23:54:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-11 23:54:26,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:26,756 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:26,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-11 23:54:26,757 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:26,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:26,757 INFO L85 PathProgramCache]: Analyzing trace with hash -180952980, now seen corresponding path program 1 times [2022-07-11 23:54:26,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:26,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598966254] [2022-07-11 23:54:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:26,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:26,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:26,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598966254] [2022-07-11 23:54:26,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598966254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:26,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:26,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:26,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022837840] [2022-07-11 23:54:26,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:26,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:26,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:26,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:26,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:26,860 INFO L87 Difference]: Start difference. First operand 332 states and 512 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 23:54:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:28,120 INFO L93 Difference]: Finished difference Result 753 states and 1165 transitions. [2022-07-11 23:54:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:28,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 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 117 [2022-07-11 23:54:28,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:28,125 INFO L225 Difference]: With dead ends: 753 [2022-07-11 23:54:28,126 INFO L226 Difference]: Without dead ends: 442 [2022-07-11 23:54:28,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:28,126 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 117 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:28,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 364 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-11 23:54:28,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-07-11 23:54:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 369. [2022-07-11 23:54:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.5516304347826086) internal successors, (571), 368 states have internal predecessors, (571), 0 states have call successors, (0), 0 states 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 23:54:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 571 transitions. [2022-07-11 23:54:28,133 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 571 transitions. Word has length 117 [2022-07-11 23:54:28,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:28,133 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 571 transitions. [2022-07-11 23:54:28,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 23:54:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 571 transitions. [2022-07-11 23:54:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-11 23:54:28,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:28,135 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] [2022-07-11 23:54:28,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-11 23:54:28,135 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:28,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:28,135 INFO L85 PathProgramCache]: Analyzing trace with hash 544267447, now seen corresponding path program 1 times [2022-07-11 23:54:28,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:28,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951467988] [2022-07-11 23:54:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:28,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:28,226 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 23:54:28,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:28,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951467988] [2022-07-11 23:54:28,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951467988] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:28,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:28,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:28,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905458068] [2022-07-11 23:54:28,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:28,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:28,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:28,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:28,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:28,229 INFO L87 Difference]: Start difference. First operand 369 states and 571 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 23:54:30,240 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:30,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:30,482 INFO L93 Difference]: Finished difference Result 801 states and 1244 transitions. [2022-07-11 23:54:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:30,483 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 118 [2022-07-11 23:54:30,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:30,484 INFO L225 Difference]: With dead ends: 801 [2022-07-11 23:54:30,484 INFO L226 Difference]: Without dead ends: 453 [2022-07-11 23:54:30,485 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 23:54:30,485 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 73 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:30,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 489 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 234 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:54:30,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-07-11 23:54:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 409. [2022-07-11 23:54:30,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 1.553921568627451) internal successors, (634), 408 states have internal predecessors, (634), 0 states have call successors, (0), 0 states 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 23:54:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 634 transitions. [2022-07-11 23:54:30,492 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 634 transitions. Word has length 118 [2022-07-11 23:54:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:30,492 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 634 transitions. [2022-07-11 23:54:30,492 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 23:54:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 634 transitions. [2022-07-11 23:54:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-11 23:54:30,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:30,513 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] [2022-07-11 23:54:30,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-11 23:54:30,513 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:30,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:30,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2016595399, now seen corresponding path program 1 times [2022-07-11 23:54:30,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:30,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323386252] [2022-07-11 23:54:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:30,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:30,593 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 23:54:30,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:30,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323386252] [2022-07-11 23:54:30,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323386252] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:30,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:30,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:30,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843222799] [2022-07-11 23:54:30,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:30,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:30,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:30,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:30,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:30,595 INFO L87 Difference]: Start difference. First operand 409 states and 634 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 23:54:32,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:32,225 INFO L93 Difference]: Finished difference Result 834 states and 1297 transitions. [2022-07-11 23:54:32,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:32,226 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 118 [2022-07-11 23:54:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:32,227 INFO L225 Difference]: With dead ends: 834 [2022-07-11 23:54:32,227 INFO L226 Difference]: Without dead ends: 446 [2022-07-11 23:54:32,228 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 23:54:32,228 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 28 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:32,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 589 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:54:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-07-11 23:54:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2022-07-11 23:54:32,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.5486111111111112) internal successors, (669), 432 states have internal predecessors, (669), 0 states have call successors, (0), 0 states 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 23:54:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 669 transitions. [2022-07-11 23:54:32,235 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 669 transitions. Word has length 118 [2022-07-11 23:54:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:32,235 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 669 transitions. [2022-07-11 23:54:32,235 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 23:54:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 669 transitions. [2022-07-11 23:54:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-11 23:54:32,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:32,236 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] [2022-07-11 23:54:32,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-11 23:54:32,237 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1059495169, now seen corresponding path program 1 times [2022-07-11 23:54:32,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:32,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986450351] [2022-07-11 23:54:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:32,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:32,313 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 23:54:32,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986450351] [2022-07-11 23:54:32,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986450351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:32,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:32,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:32,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159406794] [2022-07-11 23:54:32,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:32,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:32,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:32,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:32,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:32,315 INFO L87 Difference]: Start difference. First operand 433 states and 669 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:33,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:33,161 INFO L93 Difference]: Finished difference Result 883 states and 1367 transitions. [2022-07-11 23:54:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2022-07-11 23:54:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:33,163 INFO L225 Difference]: With dead ends: 883 [2022-07-11 23:54:33,163 INFO L226 Difference]: Without dead ends: 471 [2022-07-11 23:54:33,164 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 23:54:33,164 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 61 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:33,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 495 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:54:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-07-11 23:54:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 436. [2022-07-11 23:54:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.5448275862068965) internal successors, (672), 435 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 23:54:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 672 transitions. [2022-07-11 23:54:33,170 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 672 transitions. Word has length 125 [2022-07-11 23:54:33,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:33,171 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 672 transitions. [2022-07-11 23:54:33,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 672 transitions. [2022-07-11 23:54:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-11 23:54:33,172 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:33,172 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] [2022-07-11 23:54:33,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-11 23:54:33,172 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash 492781613, now seen corresponding path program 1 times [2022-07-11 23:54:33,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:33,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093325423] [2022-07-11 23:54:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:33,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:33,258 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 23:54:33,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:33,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093325423] [2022-07-11 23:54:33,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093325423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:33,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:33,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:33,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318435694] [2022-07-11 23:54:33,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:33,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:33,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:33,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:33,260 INFO L87 Difference]: Start difference. First operand 436 states and 672 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 23:54:33,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:33,636 INFO L93 Difference]: Finished difference Result 885 states and 1368 transitions. [2022-07-11 23:54:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:33,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 132 [2022-07-11 23:54:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:33,638 INFO L225 Difference]: With dead ends: 885 [2022-07-11 23:54:33,638 INFO L226 Difference]: Without dead ends: 470 [2022-07-11 23:54:33,638 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 23:54:33,639 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 83 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:33,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 497 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-07-11 23:54:33,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 436. [2022-07-11 23:54:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.542528735632184) internal successors, (671), 435 states have internal predecessors, (671), 0 states have call successors, (0), 0 states 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 23:54:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 671 transitions. [2022-07-11 23:54:33,645 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 671 transitions. Word has length 132 [2022-07-11 23:54:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:33,646 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 671 transitions. [2022-07-11 23:54:33,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 23:54:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 671 transitions. [2022-07-11 23:54:33,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-11 23:54:33,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:33,647 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] [2022-07-11 23:54:33,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-11 23:54:33,647 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:33,648 INFO L85 PathProgramCache]: Analyzing trace with hash -277951953, now seen corresponding path program 1 times [2022-07-11 23:54:33,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:33,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571027538] [2022-07-11 23:54:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:33,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:33,740 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 23:54:33,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:33,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571027538] [2022-07-11 23:54:33,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571027538] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:33,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:33,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:33,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548320478] [2022-07-11 23:54:33,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:33,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:33,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:33,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:33,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:33,742 INFO L87 Difference]: Start difference. First operand 436 states and 671 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 23:54:34,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:35,047 INFO L93 Difference]: Finished difference Result 863 states and 1334 transitions. [2022-07-11 23:54:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:35,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 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 132 [2022-07-11 23:54:35,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:35,049 INFO L225 Difference]: With dead ends: 863 [2022-07-11 23:54:35,049 INFO L226 Difference]: Without dead ends: 448 [2022-07-11 23:54:35,050 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 23:54:35,050 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 33 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:35,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 589 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-11 23:54:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-07-11 23:54:35,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 436. [2022-07-11 23:54:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.5402298850574712) internal successors, (670), 435 states have internal predecessors, (670), 0 states have call successors, (0), 0 states 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 23:54:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 670 transitions. [2022-07-11 23:54:35,060 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 670 transitions. Word has length 132 [2022-07-11 23:54:35,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:35,060 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 670 transitions. [2022-07-11 23:54:35,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 23:54:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 670 transitions. [2022-07-11 23:54:35,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-07-11 23:54:35,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:35,062 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] [2022-07-11 23:54:35,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-11 23:54:35,062 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:35,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:35,062 INFO L85 PathProgramCache]: Analyzing trace with hash 65033270, now seen corresponding path program 1 times [2022-07-11 23:54:35,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:35,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115877828] [2022-07-11 23:54:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:35,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:35,150 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 23:54:35,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:35,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115877828] [2022-07-11 23:54:35,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115877828] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:35,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:35,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:35,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216909509] [2022-07-11 23:54:35,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:35,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:35,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:35,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:35,152 INFO L87 Difference]: Start difference. First operand 436 states and 670 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 23:54:36,468 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 23:54:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:36,719 INFO L93 Difference]: Finished difference Result 961 states and 1480 transitions. [2022-07-11 23:54:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:36,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 23:54:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:36,721 INFO L225 Difference]: With dead ends: 961 [2022-07-11 23:54:36,721 INFO L226 Difference]: Without dead ends: 546 [2022-07-11 23:54:36,722 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 23:54:36,722 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 124 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:36,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 380 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-11 23:54:36,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-07-11 23:54:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 466. [2022-07-11 23:54:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.5311827956989248) internal successors, (712), 465 states have internal predecessors, (712), 0 states have call successors, (0), 0 states 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 23:54:36,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 712 transitions. [2022-07-11 23:54:36,746 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 712 transitions. Word has length 138 [2022-07-11 23:54:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:36,746 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 712 transitions. [2022-07-11 23:54:36,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 23:54:36,747 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 712 transitions. [2022-07-11 23:54:36,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-11 23:54:36,748 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:36,748 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] [2022-07-11 23:54:36,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-11 23:54:36,748 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:36,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1134974160, now seen corresponding path program 1 times [2022-07-11 23:54:36,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:36,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849616643] [2022-07-11 23:54:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:36,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:36,830 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 23:54:36,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:36,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849616643] [2022-07-11 23:54:36,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849616643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:36,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:36,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:36,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607862840] [2022-07-11 23:54:36,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:36,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:36,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:36,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:36,832 INFO L87 Difference]: Start difference. First operand 466 states and 712 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 23:54:38,837 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 23:54:39,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:39,103 INFO L93 Difference]: Finished difference Result 981 states and 1500 transitions. [2022-07-11 23:54:39,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:39,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 139 [2022-07-11 23:54:39,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:39,105 INFO L225 Difference]: With dead ends: 981 [2022-07-11 23:54:39,105 INFO L226 Difference]: Without dead ends: 536 [2022-07-11 23:54:39,106 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 23:54:39,106 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 123 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:39,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 364 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 245 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:54:39,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-07-11 23:54:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 466. [2022-07-11 23:54:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.5182795698924731) internal successors, (706), 465 states have internal predecessors, (706), 0 states have call successors, (0), 0 states 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 23:54:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 706 transitions. [2022-07-11 23:54:39,114 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 706 transitions. Word has length 139 [2022-07-11 23:54:39,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:39,114 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 706 transitions. [2022-07-11 23:54:39,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 23:54:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 706 transitions. [2022-07-11 23:54:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-11 23:54:39,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:39,116 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] [2022-07-11 23:54:39,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-11 23:54:39,116 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:39,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:39,116 INFO L85 PathProgramCache]: Analyzing trace with hash -658742582, now seen corresponding path program 1 times [2022-07-11 23:54:39,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:39,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504735063] [2022-07-11 23:54:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:39,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:39,212 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 23:54:39,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:39,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504735063] [2022-07-11 23:54:39,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504735063] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:39,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:39,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:39,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701587186] [2022-07-11 23:54:39,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:39,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:39,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:39,214 INFO L87 Difference]: Start difference. First operand 466 states and 706 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:41,218 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 23:54:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:41,423 INFO L93 Difference]: Finished difference Result 943 states and 1434 transitions. [2022-07-11 23:54:41,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:41,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-07-11 23:54:41,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:41,425 INFO L225 Difference]: With dead ends: 943 [2022-07-11 23:54:41,425 INFO L226 Difference]: Without dead ends: 498 [2022-07-11 23:54:41,426 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 23:54:41,426 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 73 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:41,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 515 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:54:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-07-11 23:54:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 466. [2022-07-11 23:54:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.5161290322580645) internal successors, (705), 465 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 23:54:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 705 transitions. [2022-07-11 23:54:41,433 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 705 transitions. Word has length 140 [2022-07-11 23:54:41,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:41,433 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 705 transitions. [2022-07-11 23:54:41,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 705 transitions. [2022-07-11 23:54:41,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-11 23:54:41,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:41,434 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] [2022-07-11 23:54:41,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-11 23:54:41,434 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:41,435 INFO L85 PathProgramCache]: Analyzing trace with hash 942328524, now seen corresponding path program 1 times [2022-07-11 23:54:41,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:41,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263278841] [2022-07-11 23:54:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:41,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:54:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263278841] [2022-07-11 23:54:41,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263278841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:41,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:41,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:41,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245610255] [2022-07-11 23:54:41,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:41,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:41,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:41,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:41,506 INFO L87 Difference]: Start difference. First operand 466 states and 705 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:41,541 INFO L93 Difference]: Finished difference Result 1351 states and 2059 transitions. [2022-07-11 23:54:41,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:41,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-07-11 23:54:41,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:41,544 INFO L225 Difference]: With dead ends: 1351 [2022-07-11 23:54:41,544 INFO L226 Difference]: Without dead ends: 906 [2022-07-11 23:54:41,544 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 23:54:41,545 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 141 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:41,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 426 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:41,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2022-07-11 23:54:41,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 904. [2022-07-11 23:54:41,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 1.512735326688815) internal successors, (1366), 903 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states 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 23:54:41,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1366 transitions. [2022-07-11 23:54:41,557 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1366 transitions. Word has length 140 [2022-07-11 23:54:41,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:41,557 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1366 transitions. [2022-07-11 23:54:41,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:41,557 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1366 transitions. [2022-07-11 23:54:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-11 23:54:41,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:41,559 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] [2022-07-11 23:54:41,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-11 23:54:41,559 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:41,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:41,560 INFO L85 PathProgramCache]: Analyzing trace with hash -903038642, now seen corresponding path program 1 times [2022-07-11 23:54:41,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:41,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384191491] [2022-07-11 23:54:41,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:41,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-11 23:54:41,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:41,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384191491] [2022-07-11 23:54:41,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384191491] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:41,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:41,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:41,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31925871] [2022-07-11 23:54:41,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:41,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:41,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:41,658 INFO L87 Difference]: Start difference. First operand 904 states and 1366 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 23:54:43,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:43,829 INFO L93 Difference]: Finished difference Result 1868 states and 2825 transitions. [2022-07-11 23:54:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:43,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 140 [2022-07-11 23:54:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:43,832 INFO L225 Difference]: With dead ends: 1868 [2022-07-11 23:54:43,832 INFO L226 Difference]: Without dead ends: 985 [2022-07-11 23:54:43,833 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 23:54:43,834 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 31 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:43,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 589 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:54:43,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-07-11 23:54:43,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 956. [2022-07-11 23:54:43,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.5120418848167538) internal successors, (1444), 955 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states 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 23:54:43,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1444 transitions. [2022-07-11 23:54:43,846 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1444 transitions. Word has length 140 [2022-07-11 23:54:43,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:43,847 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1444 transitions. [2022-07-11 23:54:43,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 23:54:43,847 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1444 transitions. [2022-07-11 23:54:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-11 23:54:43,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:43,849 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] [2022-07-11 23:54:43,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-11 23:54:43,849 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:43,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:43,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2107256807, now seen corresponding path program 1 times [2022-07-11 23:54:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:43,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911650698] [2022-07-11 23:54:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:43,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:43,958 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 23:54:43,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:43,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911650698] [2022-07-11 23:54:43,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911650698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:43,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:43,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:43,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922533469] [2022-07-11 23:54:43,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:43,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:43,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:43,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:43,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:43,960 INFO L87 Difference]: Start difference. First operand 956 states and 1444 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 23:54:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:44,898 INFO L93 Difference]: Finished difference Result 2106 states and 3173 transitions. [2022-07-11 23:54:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:44,899 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 23:54:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:44,902 INFO L225 Difference]: With dead ends: 2106 [2022-07-11 23:54:44,902 INFO L226 Difference]: Without dead ends: 1171 [2022-07-11 23:54:44,903 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 23:54:44,903 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 125 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:44,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 380 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 23:54:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-07-11 23:54:44,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1012. [2022-07-11 23:54:44,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 1.5014836795252227) internal successors, (1518), 1011 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states 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 23:54:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1518 transitions. [2022-07-11 23:54:44,917 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1518 transitions. Word has length 142 [2022-07-11 23:54:44,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:44,917 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 1518 transitions. [2022-07-11 23:54:44,917 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 23:54:44,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1518 transitions. [2022-07-11 23:54:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-11 23:54:44,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:44,919 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] [2022-07-11 23:54:44,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-11 23:54:44,919 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash 271946515, now seen corresponding path program 1 times [2022-07-11 23:54:44,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:44,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607238443] [2022-07-11 23:54:44,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:44,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:44,996 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 23:54:44,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:44,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607238443] [2022-07-11 23:54:44,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607238443] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:44,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:44,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:44,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326399] [2022-07-11 23:54:44,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:44,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:44,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:44,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:44,998 INFO L87 Difference]: Start difference. First operand 1012 states and 1518 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 23:54:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:45,915 INFO L93 Difference]: Finished difference Result 2050 states and 3072 transitions. [2022-07-11 23:54:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:45,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-07-11 23:54:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:45,918 INFO L225 Difference]: With dead ends: 2050 [2022-07-11 23:54:45,918 INFO L226 Difference]: Without dead ends: 1059 [2022-07-11 23:54:45,919 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 23:54:45,919 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 57 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:45,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 533 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 23:54:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-07-11 23:54:45,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1012. [2022-07-11 23:54:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 1.499505440158259) internal successors, (1516), 1011 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states 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 23:54:45,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1516 transitions. [2022-07-11 23:54:45,932 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1516 transitions. Word has length 143 [2022-07-11 23:54:45,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:45,933 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 1516 transitions. [2022-07-11 23:54:45,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 23:54:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1516 transitions. [2022-07-11 23:54:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-11 23:54:45,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:45,934 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, 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 23:54:45,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-11 23:54:45,935 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1420337599, now seen corresponding path program 1 times [2022-07-11 23:54:45,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:45,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318694021] [2022-07-11 23:54:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:45,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:54:46,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:46,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318694021] [2022-07-11 23:54:46,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318694021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:46,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:46,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691177996] [2022-07-11 23:54:46,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:46,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:46,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:46,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:46,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:46,012 INFO L87 Difference]: Start difference. First operand 1012 states and 1516 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:46,678 INFO L93 Difference]: Finished difference Result 2138 states and 3193 transitions. [2022-07-11 23:54:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:46,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2022-07-11 23:54:46,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:46,681 INFO L225 Difference]: With dead ends: 2138 [2022-07-11 23:54:46,681 INFO L226 Difference]: Without dead ends: 1147 [2022-07-11 23:54:46,682 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 23:54:46,682 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 127 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:46,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 368 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:54:46,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-07-11 23:54:46,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1012. [2022-07-11 23:54:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 1.4836795252225519) internal successors, (1500), 1011 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 23:54:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1500 transitions. [2022-07-11 23:54:46,708 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1500 transitions. Word has length 146 [2022-07-11 23:54:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:46,708 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 1500 transitions. [2022-07-11 23:54:46,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1500 transitions. [2022-07-11 23:54:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-11 23:54:46,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:46,714 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, 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 23:54:46,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-11 23:54:46,714 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash -72635493, now seen corresponding path program 1 times [2022-07-11 23:54:46,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:46,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801837183] [2022-07-11 23:54:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:54:46,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:46,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801837183] [2022-07-11 23:54:46,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801837183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:46,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:46,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:46,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830775403] [2022-07-11 23:54:46,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:46,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:46,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:46,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:46,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:46,793 INFO L87 Difference]: Start difference. First operand 1012 states and 1500 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 23:54:47,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:47,238 INFO L93 Difference]: Finished difference Result 2138 states and 3161 transitions. [2022-07-11 23:54:47,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:47,239 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 147 [2022-07-11 23:54:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:47,241 INFO L225 Difference]: With dead ends: 2138 [2022-07-11 23:54:47,242 INFO L226 Difference]: Without dead ends: 1147 [2022-07-11 23:54:47,242 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 23:54:47,243 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 126 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:47,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 364 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-07-11 23:54:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1012. [2022-07-11 23:54:47,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 1.4678536102868447) internal successors, (1484), 1011 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states 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 23:54:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1484 transitions. [2022-07-11 23:54:47,257 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1484 transitions. Word has length 147 [2022-07-11 23:54:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:47,257 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 1484 transitions. [2022-07-11 23:54:47,257 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 23:54:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1484 transitions. [2022-07-11 23:54:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-11 23:54:47,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:47,259 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, 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 23:54:47,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-11 23:54:47,259 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:47,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:47,259 INFO L85 PathProgramCache]: Analyzing trace with hash -194194128, now seen corresponding path program 1 times [2022-07-11 23:54:47,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:47,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961586753] [2022-07-11 23:54:47,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:47,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-11 23:54:47,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:47,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961586753] [2022-07-11 23:54:47,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961586753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:47,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:47,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:47,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168517485] [2022-07-11 23:54:47,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:47,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:47,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:47,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:47,358 INFO L87 Difference]: Start difference. First operand 1012 states and 1484 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 23:54:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:48,099 INFO L93 Difference]: Finished difference Result 2218 states and 3247 transitions. [2022-07-11 23:54:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:48,099 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 150 [2022-07-11 23:54:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:48,102 INFO L225 Difference]: With dead ends: 2218 [2022-07-11 23:54:48,102 INFO L226 Difference]: Without dead ends: 1227 [2022-07-11 23:54:48,103 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 23:54:48,103 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 117 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:48,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 364 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:54:48,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-07-11 23:54:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1082. [2022-07-11 23:54:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1081 states have (on average 1.461609620721554) internal successors, (1580), 1081 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states 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 23:54:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 1580 transitions. [2022-07-11 23:54:48,119 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 1580 transitions. Word has length 150 [2022-07-11 23:54:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:48,119 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 1580 transitions. [2022-07-11 23:54:48,119 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 23:54:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 1580 transitions. [2022-07-11 23:54:48,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-11 23:54:48,121 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:48,121 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, 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 23:54:48,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-11 23:54:48,121 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:48,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:48,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1452774436, now seen corresponding path program 1 times [2022-07-11 23:54:48,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:48,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603711596] [2022-07-11 23:54:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:48,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:54:48,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:48,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603711596] [2022-07-11 23:54:48,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603711596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:48,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:48,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:48,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447988136] [2022-07-11 23:54:48,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:48,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:48,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:48,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:48,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:48,218 INFO L87 Difference]: Start difference. First operand 1082 states and 1580 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 23:54:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:48,724 INFO L93 Difference]: Finished difference Result 2358 states and 3439 transitions. [2022-07-11 23:54:48,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:48,724 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 150 [2022-07-11 23:54:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:48,727 INFO L225 Difference]: With dead ends: 2358 [2022-07-11 23:54:48,728 INFO L226 Difference]: Without dead ends: 1297 [2022-07-11 23:54:48,728 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 23:54:48,729 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 119 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:48,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 374 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:48,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2022-07-11 23:54:48,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1148. [2022-07-11 23:54:48,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 1.4542284219703574) internal successors, (1668), 1147 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states 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 23:54:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1668 transitions. [2022-07-11 23:54:48,744 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1668 transitions. Word has length 150 [2022-07-11 23:54:48,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:48,744 INFO L495 AbstractCegarLoop]: Abstraction has 1148 states and 1668 transitions. [2022-07-11 23:54:48,744 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 23:54:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1668 transitions. [2022-07-11 23:54:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-11 23:54:48,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:48,746 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, 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 23:54:48,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-11 23:54:48,746 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:48,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:48,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1899790727, now seen corresponding path program 1 times [2022-07-11 23:54:48,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:48,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605391808] [2022-07-11 23:54:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:48,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:54:48,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:48,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605391808] [2022-07-11 23:54:48,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605391808] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:48,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:48,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:48,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919502326] [2022-07-11 23:54:48,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:48,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:48,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:48,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:48,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:48,846 INFO L87 Difference]: Start difference. First operand 1148 states and 1668 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 23:54:50,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:50,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:50,995 INFO L93 Difference]: Finished difference Result 2306 states and 3350 transitions. [2022-07-11 23:54:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:50,995 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 151 [2022-07-11 23:54:50,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:50,998 INFO L225 Difference]: With dead ends: 2306 [2022-07-11 23:54:50,998 INFO L226 Difference]: Without dead ends: 1179 [2022-07-11 23:54:50,999 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 23:54:50,999 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 39 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:51,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 543 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-11 23:54:51,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-07-11 23:54:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1148. [2022-07-11 23:54:51,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 1.4524847428073235) internal successors, (1666), 1147 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states 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 23:54:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1666 transitions. [2022-07-11 23:54:51,016 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1666 transitions. Word has length 151 [2022-07-11 23:54:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:51,016 INFO L495 AbstractCegarLoop]: Abstraction has 1148 states and 1666 transitions. [2022-07-11 23:54:51,016 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 23:54:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1666 transitions. [2022-07-11 23:54:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-11 23:54:51,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:51,018 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, 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 23:54:51,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-11 23:54:51,018 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:51,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2064980709, now seen corresponding path program 1 times [2022-07-11 23:54:51,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:51,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172377457] [2022-07-11 23:54:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:51,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-11 23:54:51,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:51,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172377457] [2022-07-11 23:54:51,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172377457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:51,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:51,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:51,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060265880] [2022-07-11 23:54:51,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:51,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:51,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:51,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:51,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:51,103 INFO L87 Difference]: Start difference. First operand 1148 states and 1666 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 23:54:52,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:52,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:52,938 INFO L93 Difference]: Finished difference Result 2300 states and 3339 transitions. [2022-07-11 23:54:52,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:52,938 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 151 [2022-07-11 23:54:52,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:52,941 INFO L225 Difference]: With dead ends: 2300 [2022-07-11 23:54:52,941 INFO L226 Difference]: Without dead ends: 1173 [2022-07-11 23:54:52,942 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 23:54:52,942 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 33 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:52,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 545 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-11 23:54:52,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2022-07-11 23:54:52,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1148. [2022-07-11 23:54:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 1.4507410636442895) internal successors, (1664), 1147 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 23:54:52,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1664 transitions. [2022-07-11 23:54:52,956 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1664 transitions. Word has length 151 [2022-07-11 23:54:52,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:52,957 INFO L495 AbstractCegarLoop]: Abstraction has 1148 states and 1664 transitions. [2022-07-11 23:54:52,957 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 23:54:52,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1664 transitions. [2022-07-11 23:54:52,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-11 23:54:52,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:52,958 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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 23:54:52,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-11 23:54:52,959 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:52,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1423813628, now seen corresponding path program 1 times [2022-07-11 23:54:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:52,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688119592] [2022-07-11 23:54:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:52,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-11 23:54:53,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:53,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688119592] [2022-07-11 23:54:53,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688119592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:53,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:53,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:53,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739923116] [2022-07-11 23:54:53,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:53,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:53,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:53,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:53,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:53,037 INFO L87 Difference]: Start difference. First operand 1148 states and 1664 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 23:54:54,583 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:54,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:54,808 INFO L93 Difference]: Finished difference Result 2430 states and 3521 transitions. [2022-07-11 23:54:54,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:54,808 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 154 [2022-07-11 23:54:54,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:54,811 INFO L225 Difference]: With dead ends: 2430 [2022-07-11 23:54:54,811 INFO L226 Difference]: Without dead ends: 1303 [2022-07-11 23:54:54,812 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 23:54:54,812 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 64 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:54,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 561 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-11 23:54:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-07-11 23:54:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1224. [2022-07-11 23:54:54,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.4488961569910057) internal successors, (1772), 1223 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states 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 23:54:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1772 transitions. [2022-07-11 23:54:54,829 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1772 transitions. Word has length 154 [2022-07-11 23:54:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:54,829 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 1772 transitions. [2022-07-11 23:54:54,829 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 23:54:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1772 transitions. [2022-07-11 23:54:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-11 23:54:54,831 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:54,831 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, 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 23:54:54,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-11 23:54:54,831 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:54,832 INFO L85 PathProgramCache]: Analyzing trace with hash -959672524, now seen corresponding path program 1 times [2022-07-11 23:54:54,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:54,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902563138] [2022-07-11 23:54:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:54,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-11 23:54:54,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:54,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902563138] [2022-07-11 23:54:54,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902563138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:54,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:54,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:54,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717030790] [2022-07-11 23:54:54,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:54,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:54,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:54,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:54,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:54,911 INFO L87 Difference]: Start difference. First operand 1224 states and 1772 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:55,463 INFO L93 Difference]: Finished difference Result 2562 states and 3705 transitions. [2022-07-11 23:54:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:55,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2022-07-11 23:54:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:55,467 INFO L225 Difference]: With dead ends: 2562 [2022-07-11 23:54:55,467 INFO L226 Difference]: Without dead ends: 1359 [2022-07-11 23:54:55,468 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 23:54:55,468 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 113 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:55,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 364 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:55,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2022-07-11 23:54:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1148. [2022-07-11 23:54:55,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 1.4472537053182215) internal successors, (1660), 1147 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states 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 23:54:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1660 transitions. [2022-07-11 23:54:55,483 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1660 transitions. Word has length 159 [2022-07-11 23:54:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:55,484 INFO L495 AbstractCegarLoop]: Abstraction has 1148 states and 1660 transitions. [2022-07-11 23:54:55,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:54:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1660 transitions. [2022-07-11 23:54:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-11 23:54:55,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:55,486 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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] [2022-07-11 23:54:55,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-11 23:54:55,486 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:55,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:55,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1913666090, now seen corresponding path program 1 times [2022-07-11 23:54:55,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:55,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100144274] [2022-07-11 23:54:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:55,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-11 23:54:55,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:55,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100144274] [2022-07-11 23:54:55,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100144274] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:55,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:55,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:55,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333509158] [2022-07-11 23:54:55,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:55,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:55,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:55,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:55,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:55,567 INFO L87 Difference]: Start difference. First operand 1148 states and 1660 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 23:54:56,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:56,708 INFO L93 Difference]: Finished difference Result 2430 states and 3511 transitions. [2022-07-11 23:54:56,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:56,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 161 [2022-07-11 23:54:56,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:56,711 INFO L225 Difference]: With dead ends: 2430 [2022-07-11 23:54:56,711 INFO L226 Difference]: Without dead ends: 1303 [2022-07-11 23:54:56,712 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 23:54:56,712 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 58 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:56,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 563 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:54:56,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-07-11 23:54:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1234. [2022-07-11 23:54:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 1.4452554744525548) internal successors, (1782), 1233 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states 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 23:54:56,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1782 transitions. [2022-07-11 23:54:56,730 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1782 transitions. Word has length 161 [2022-07-11 23:54:56,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:56,730 INFO L495 AbstractCegarLoop]: Abstraction has 1234 states and 1782 transitions. [2022-07-11 23:54:56,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 23:54:56,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1782 transitions. [2022-07-11 23:54:56,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-11 23:54:56,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:56,732 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 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 23:54:56,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-11 23:54:56,732 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:56,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1438221833, now seen corresponding path program 1 times [2022-07-11 23:54:56,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:56,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408816587] [2022-07-11 23:54:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-11 23:54:56,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:56,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408816587] [2022-07-11 23:54:56,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408816587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:56,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:56,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:56,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168123150] [2022-07-11 23:54:56,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:56,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:56,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:56,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:56,816 INFO L87 Difference]: Start difference. First operand 1234 states and 1782 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 23:54:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:57,709 INFO L93 Difference]: Finished difference Result 2510 states and 3624 transitions. [2022-07-11 23:54:57,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:57,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 162 [2022-07-11 23:54:57,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:57,712 INFO L225 Difference]: With dead ends: 2510 [2022-07-11 23:54:57,712 INFO L226 Difference]: Without dead ends: 1293 [2022-07-11 23:54:57,713 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 23:54:57,713 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 54 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:57,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 565 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 23:54:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-07-11 23:54:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1232. [2022-07-11 23:54:57,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 1.4443541835905767) internal successors, (1778), 1231 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states 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 23:54:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1778 transitions. [2022-07-11 23:54:57,730 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1778 transitions. Word has length 162 [2022-07-11 23:54:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:57,730 INFO L495 AbstractCegarLoop]: Abstraction has 1232 states and 1778 transitions. [2022-07-11 23:54:57,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 23:54:57,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1778 transitions. [2022-07-11 23:54:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-11 23:54:57,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:57,732 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] [2022-07-11 23:54:57,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-11 23:54:57,732 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:57,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1049990310, now seen corresponding path program 1 times [2022-07-11 23:54:57,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:57,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916371497] [2022-07-11 23:54:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:57,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-07-11 23:54:58,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:58,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916371497] [2022-07-11 23:54:58,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916371497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:58,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:58,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:54:58,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119332059] [2022-07-11 23:54:58,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:58,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:54:58,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:58,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:54:58,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:54:58,006 INFO L87 Difference]: Start difference. First operand 1232 states and 1778 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 23:54:58,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:58,850 INFO L93 Difference]: Finished difference Result 2461 states and 3552 transitions. [2022-07-11 23:54:58,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:54:58,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 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 166 [2022-07-11 23:54:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:58,853 INFO L225 Difference]: With dead ends: 2461 [2022-07-11 23:54:58,853 INFO L226 Difference]: Without dead ends: 1232 [2022-07-11 23:54:58,854 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 23:54:58,854 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 7 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:58,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 687 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:54:58,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-07-11 23:54:58,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1232. [2022-07-11 23:54:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 1.4435418359057677) internal successors, (1777), 1231 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states 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 23:54:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1777 transitions. [2022-07-11 23:54:58,872 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1777 transitions. Word has length 166 [2022-07-11 23:54:58,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:58,872 INFO L495 AbstractCegarLoop]: Abstraction has 1232 states and 1777 transitions. [2022-07-11 23:54:58,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 23:54:58,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1777 transitions. [2022-07-11 23:54:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-11 23:54:58,881 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:58,881 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] [2022-07-11 23:54:58,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-07-11 23:54:58,881 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:58,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:58,882 INFO L85 PathProgramCache]: Analyzing trace with hash -674618012, now seen corresponding path program 1 times [2022-07-11 23:54:58,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:58,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104992733] [2022-07-11 23:54:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:58,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 146 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-11 23:54:59,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:59,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104992733] [2022-07-11 23:54:59,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104992733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:54:59,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269574210] [2022-07-11 23:54:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:59,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:54:59,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:54:59,511 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 23:54:59,512 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 23:55:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:00,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 196 conjunts are in the unsatisfiable core [2022-07-11 23:55:00,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:55:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:03,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:03,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:21,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:21,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:21,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:21,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:21,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:21,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:21,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:21,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:21,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:21,232 INFO L244 Elim1Store]: Index analysis took 159 ms