./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:05:19,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:05:19,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:05:19,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:05:19,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:05:19,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:05:19,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:05:19,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:05:19,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:05:19,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:05:19,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:05:19,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:05:19,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:05:19,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:05:19,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:05:19,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:05:19,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:05:19,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:05:19,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:05:19,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:05:19,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:05:19,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:05:19,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:05:19,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:05:19,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:05:19,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:05:19,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:05:19,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:05:19,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:05:19,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:05:19,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:05:19,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:05:19,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:05:19,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:05:19,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:05:19,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:05:19,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:05:19,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:05:19,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:05:19,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:05:19,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:05:19,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:05:19,374 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:05:19,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:05:19,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:05:19,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:05:19,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:05:19,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:05:19,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:05:19,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:05:19,378 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:05:19,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:05:19,379 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:05:19,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:05:19,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:05:19,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:05:19,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:05:19,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:05:19,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:05:19,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:05:19,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:05:19,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:05:19,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:05:19,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:05:19,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:05:19,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:05:19,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:05:19,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:05:19,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:05:19,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:05:19,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:05:19,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:05:19,384 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:05:19,384 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:05:19,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:05:19,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:05:19,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cbab6fa89ec0662a3f26b65a5642d5ae526485e7fe3ba965ed5a2823e941a06 [2021-12-17 03:05:19,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:05:19,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:05:19,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:05:19,601 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:05:19,602 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:05:19,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-12-17 03:05:19,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd05b11b4/63f13b3488624f48bf91ae1d73ce45aa/FLAG7871e15b1 [2021-12-17 03:05:20,084 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:05:20,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.01.i.cil-1.c [2021-12-17 03:05:20,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd05b11b4/63f13b3488624f48bf91ae1d73ce45aa/FLAG7871e15b1 [2021-12-17 03:05:20,104 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd05b11b4/63f13b3488624f48bf91ae1d73ce45aa [2021-12-17 03:05:20,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:05:20,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:05:20,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:05:20,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:05:20,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:05:20,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ea076ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20, skipping insertion in model container [2021-12-17 03:05:20,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:05:20,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:05:20,426 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.01.i.cil-1.c[72918,72931] [2021-12-17 03:05:20,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:05:20,439 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:05:20,497 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.01.i.cil-1.c[72918,72931] [2021-12-17 03:05:20,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:05:20,510 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:05:20,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20 WrapperNode [2021-12-17 03:05:20,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:05:20,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:05:20,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:05:20,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:05:20,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,556 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 788 [2021-12-17 03:05:20,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:05:20,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:05:20,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:05:20,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:05:20,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:05:20,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:05:20,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:05:20,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:05:20,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20" (1/1) ... [2021-12-17 03:05:20,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:05:20,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:05:20,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 03:05:20,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 03:05:20,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:05:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 03:05:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 03:05:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 03:05:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 03:05:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:05:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 03:05:20,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:05:20,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:05:20,901 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:05:20,902 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:05:20,914 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 03:05:23,488 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-17 03:05:23,489 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-17 03:05:23,489 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:05:23,496 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:05:23,496 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:05:23,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:05:23 BoogieIcfgContainer [2021-12-17 03:05:23,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:05:23,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:05:23,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:05:23,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:05:23,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:05:20" (1/3) ... [2021-12-17 03:05:23,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704b248a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:05:23, skipping insertion in model container [2021-12-17 03:05:23,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:05:20" (2/3) ... [2021-12-17 03:05:23,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704b248a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:05:23, skipping insertion in model container [2021-12-17 03:05:23,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:05:23" (3/3) ... [2021-12-17 03:05:23,505 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.01.i.cil-1.c [2021-12-17 03:05:23,509 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:05:23,509 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:05:23,541 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:05:23,547 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 03:05:23,547 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:05:23,559 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:23,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 03:05:23,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:23,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:23,566 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:23,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1383952291, now seen corresponding path program 1 times [2021-12-17 03:05:23,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:23,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598401540] [2021-12-17 03:05:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:23,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:05:23,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:23,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598401540] [2021-12-17 03:05:23,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598401540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:23,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:23,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:23,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965651113] [2021-12-17 03:05:23,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:23,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:23,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:23,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:23,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:23,998 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.696551724137931) internal successors, (246), 146 states have internal predecessors, (246), 0 states have call successors, (0), 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 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:26,016 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:26,319 INFO L93 Difference]: Finished difference Result 319 states and 533 transitions. [2021-12-17 03:05:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:26,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-12-17 03:05:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:26,328 INFO L225 Difference]: With dead ends: 319 [2021-12-17 03:05:26,328 INFO L226 Difference]: Without dead ends: 162 [2021-12-17 03:05:26,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:26,333 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 35 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:26,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 561 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:05:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-17 03:05:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-12-17 03:05:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5416666666666667) internal successors, (222), 144 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 222 transitions. [2021-12-17 03:05:26,363 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 222 transitions. Word has length 48 [2021-12-17 03:05:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:26,363 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 222 transitions. [2021-12-17 03:05:26,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 222 transitions. [2021-12-17 03:05:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:05:26,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:26,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:26,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:05:26,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:26,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1669844783, now seen corresponding path program 1 times [2021-12-17 03:05:26,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:26,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559277686] [2021-12-17 03:05:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:26,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:05:26,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:26,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559277686] [2021-12-17 03:05:26,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559277686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:26,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:26,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:26,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393734181] [2021-12-17 03:05:26,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:26,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:26,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:26,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:26,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:26,476 INFO L87 Difference]: Start difference. First operand 145 states and 222 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:28,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:28,685 INFO L93 Difference]: Finished difference Result 286 states and 432 transitions. [2021-12-17 03:05:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:28,685 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 [2021-12-17 03:05:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:28,686 INFO L225 Difference]: With dead ends: 286 [2021-12-17 03:05:28,686 INFO L226 Difference]: Without dead ends: 162 [2021-12-17 03:05:28,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:28,688 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 24 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:28,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 450 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:05:28,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-17 03:05:28,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-12-17 03:05:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5347222222222223) internal successors, (221), 144 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 221 transitions. [2021-12-17 03:05:28,698 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 221 transitions. Word has length 61 [2021-12-17 03:05:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:28,699 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 221 transitions. [2021-12-17 03:05:28,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 221 transitions. [2021-12-17 03:05:28,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 03:05:28,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:28,703 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:28,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:05:28,703 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:28,704 INFO L85 PathProgramCache]: Analyzing trace with hash 911843153, now seen corresponding path program 1 times [2021-12-17 03:05:28,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:28,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623685762] [2021-12-17 03:05:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:28,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:05:28,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:28,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623685762] [2021-12-17 03:05:28,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623685762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:28,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:28,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:28,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327827128] [2021-12-17 03:05:28,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:28,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:28,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:28,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:28,800 INFO L87 Difference]: Start difference. First operand 145 states and 221 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:30,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:31,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:31,035 INFO L93 Difference]: Finished difference Result 285 states and 430 transitions. [2021-12-17 03:05:31,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:31,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-17 03:05:31,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:31,037 INFO L225 Difference]: With dead ends: 285 [2021-12-17 03:05:31,038 INFO L226 Difference]: Without dead ends: 161 [2021-12-17 03:05:31,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:31,039 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 21 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:31,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 452 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:05:31,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-17 03:05:31,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 145. [2021-12-17 03:05:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5277777777777777) internal successors, (220), 144 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 220 transitions. [2021-12-17 03:05:31,045 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 220 transitions. Word has length 62 [2021-12-17 03:05:31,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:31,045 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 220 transitions. [2021-12-17 03:05:31,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:31,045 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 220 transitions. [2021-12-17 03:05:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 03:05:31,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:31,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:31,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:05:31,047 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1350629653, now seen corresponding path program 1 times [2021-12-17 03:05:31,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:31,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366510148] [2021-12-17 03:05:31,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:31,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:05:31,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:31,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366510148] [2021-12-17 03:05:31,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366510148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:31,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:31,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:31,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445062113] [2021-12-17 03:05:31,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:31,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:31,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:31,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:31,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:31,158 INFO L87 Difference]: Start difference. First operand 145 states and 220 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:33,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:33,480 INFO L93 Difference]: Finished difference Result 385 states and 588 transitions. [2021-12-17 03:05:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:33,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-17 03:05:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:33,481 INFO L225 Difference]: With dead ends: 385 [2021-12-17 03:05:33,481 INFO L226 Difference]: Without dead ends: 261 [2021-12-17 03:05:33,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:33,483 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 139 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:33,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 309 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:05:33,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-17 03:05:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 162. [2021-12-17 03:05:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.5341614906832297) internal successors, (247), 161 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 247 transitions. [2021-12-17 03:05:33,501 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 247 transitions. Word has length 62 [2021-12-17 03:05:33,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:33,502 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 247 transitions. [2021-12-17 03:05:33,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 247 transitions. [2021-12-17 03:05:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 03:05:33,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:33,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:33,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:05:33,506 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:33,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:33,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1409691870, now seen corresponding path program 1 times [2021-12-17 03:05:33,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:33,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267094576] [2021-12-17 03:05:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:33,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:05:33,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267094576] [2021-12-17 03:05:33,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267094576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:33,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:33,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:33,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330457058] [2021-12-17 03:05:33,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:33,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:33,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:33,605 INFO L87 Difference]: Start difference. First operand 162 states and 247 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:35,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:35,783 INFO L93 Difference]: Finished difference Result 316 states and 481 transitions. [2021-12-17 03:05:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:35,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 03:05:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:35,784 INFO L225 Difference]: With dead ends: 316 [2021-12-17 03:05:35,784 INFO L226 Difference]: Without dead ends: 175 [2021-12-17 03:05:35,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:35,785 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 26 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:35,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 458 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:05:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-17 03:05:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 162. [2021-12-17 03:05:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.5279503105590062) internal successors, (246), 161 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 246 transitions. [2021-12-17 03:05:35,791 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 246 transitions. Word has length 63 [2021-12-17 03:05:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:35,791 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 246 transitions. [2021-12-17 03:05:35,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 246 transitions. [2021-12-17 03:05:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 03:05:35,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:35,792 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:35,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:05:35,792 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:35,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:35,793 INFO L85 PathProgramCache]: Analyzing trace with hash 759775670, now seen corresponding path program 1 times [2021-12-17 03:05:35,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:35,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595874702] [2021-12-17 03:05:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:35,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:05:35,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:35,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595874702] [2021-12-17 03:05:35,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595874702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:35,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:35,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:35,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021033119] [2021-12-17 03:05:35,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:35,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:35,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:35,874 INFO L87 Difference]: Start difference. First operand 162 states and 246 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:37,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:38,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:38,069 INFO L93 Difference]: Finished difference Result 316 states and 480 transitions. [2021-12-17 03:05:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:38,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 03:05:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:38,070 INFO L225 Difference]: With dead ends: 316 [2021-12-17 03:05:38,070 INFO L226 Difference]: Without dead ends: 175 [2021-12-17 03:05:38,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:38,071 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 24 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:38,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 458 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:05:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-17 03:05:38,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 162. [2021-12-17 03:05:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.5217391304347827) internal successors, (245), 161 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 245 transitions. [2021-12-17 03:05:38,076 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 245 transitions. Word has length 63 [2021-12-17 03:05:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:38,076 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 245 transitions. [2021-12-17 03:05:38,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 245 transitions. [2021-12-17 03:05:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 03:05:38,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:38,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:38,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:05:38,077 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:38,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:38,078 INFO L85 PathProgramCache]: Analyzing trace with hash -538386502, now seen corresponding path program 1 times [2021-12-17 03:05:38,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:38,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56973732] [2021-12-17 03:05:38,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:38,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:05:38,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:38,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56973732] [2021-12-17 03:05:38,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56973732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:38,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:38,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:38,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018291020] [2021-12-17 03:05:38,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:38,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:38,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:38,142 INFO L87 Difference]: Start difference. First operand 162 states and 245 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:40,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:40,324 INFO L93 Difference]: Finished difference Result 316 states and 479 transitions. [2021-12-17 03:05:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:40,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-17 03:05:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:40,325 INFO L225 Difference]: With dead ends: 316 [2021-12-17 03:05:40,326 INFO L226 Difference]: Without dead ends: 175 [2021-12-17 03:05:40,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:40,326 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 22 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:40,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 458 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:05:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-17 03:05:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 162. [2021-12-17 03:05:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.515527950310559) internal successors, (244), 161 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 244 transitions. [2021-12-17 03:05:40,330 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 244 transitions. Word has length 64 [2021-12-17 03:05:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:40,330 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 244 transitions. [2021-12-17 03:05:40,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:40,330 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 244 transitions. [2021-12-17 03:05:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 03:05:40,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:40,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:40,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:05:40,331 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:40,331 INFO L85 PathProgramCache]: Analyzing trace with hash -34985065, now seen corresponding path program 1 times [2021-12-17 03:05:40,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:40,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749021791] [2021-12-17 03:05:40,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:40,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:05:40,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:40,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749021791] [2021-12-17 03:05:40,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749021791] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:40,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:40,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:40,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902355359] [2021-12-17 03:05:40,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:40,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:40,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:40,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:40,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:40,427 INFO L87 Difference]: Start difference. First operand 162 states and 244 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:42,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:42,733 INFO L93 Difference]: Finished difference Result 419 states and 639 transitions. [2021-12-17 03:05:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-17 03:05:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:42,735 INFO L225 Difference]: With dead ends: 419 [2021-12-17 03:05:42,735 INFO L226 Difference]: Without dead ends: 278 [2021-12-17 03:05:42,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:42,736 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 112 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:42,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 310 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:05:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-17 03:05:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 205. [2021-12-17 03:05:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5833333333333333) internal successors, (323), 204 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2021-12-17 03:05:42,741 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 65 [2021-12-17 03:05:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:42,741 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2021-12-17 03:05:42,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:42,742 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2021-12-17 03:05:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 03:05:42,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:42,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:42,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 03:05:42,743 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:42,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:42,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1305412400, now seen corresponding path program 1 times [2021-12-17 03:05:42,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:42,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926986888] [2021-12-17 03:05:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:42,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:05:42,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:42,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926986888] [2021-12-17 03:05:42,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926986888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:42,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:42,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:42,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361554943] [2021-12-17 03:05:42,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:42,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:42,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:42,812 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:44,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:45,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:45,118 INFO L93 Difference]: Finished difference Result 488 states and 769 transitions. [2021-12-17 03:05:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:45,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-17 03:05:45,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:45,119 INFO L225 Difference]: With dead ends: 488 [2021-12-17 03:05:45,119 INFO L226 Difference]: Without dead ends: 302 [2021-12-17 03:05:45,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:45,121 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 113 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:45,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 325 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:05:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-12-17 03:05:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 230. [2021-12-17 03:05:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.6244541484716157) internal successors, (372), 229 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 372 transitions. [2021-12-17 03:05:45,126 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 372 transitions. Word has length 66 [2021-12-17 03:05:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:45,126 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 372 transitions. [2021-12-17 03:05:45,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 372 transitions. [2021-12-17 03:05:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 03:05:45,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:45,127 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:45,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:05:45,127 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1115483845, now seen corresponding path program 1 times [2021-12-17 03:05:45,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:45,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281955055] [2021-12-17 03:05:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:45,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 03:05:45,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:45,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281955055] [2021-12-17 03:05:45,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281955055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:45,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:45,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:45,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245988337] [2021-12-17 03:05:45,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:45,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:45,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:45,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:45,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:45,208 INFO L87 Difference]: Start difference. First operand 230 states and 372 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:47,223 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:47,419 INFO L93 Difference]: Finished difference Result 482 states and 782 transitions. [2021-12-17 03:05:47,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:47,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 95 [2021-12-17 03:05:47,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:47,420 INFO L225 Difference]: With dead ends: 482 [2021-12-17 03:05:47,420 INFO L226 Difference]: Without dead ends: 273 [2021-12-17 03:05:47,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:47,421 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 33 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:47,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 500 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:05:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-17 03:05:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 252. [2021-12-17 03:05:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6294820717131475) internal successors, (409), 251 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 409 transitions. [2021-12-17 03:05:47,427 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 409 transitions. Word has length 95 [2021-12-17 03:05:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:47,428 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 409 transitions. [2021-12-17 03:05:47,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 409 transitions. [2021-12-17 03:05:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-17 03:05:47,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:47,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:47,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:05:47,430 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:47,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:47,430 INFO L85 PathProgramCache]: Analyzing trace with hash 464418207, now seen corresponding path program 1 times [2021-12-17 03:05:47,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:47,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954023820] [2021-12-17 03:05:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:47,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:05:47,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:47,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954023820] [2021-12-17 03:05:47,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954023820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:47,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:47,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:47,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829620397] [2021-12-17 03:05:47,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:47,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:47,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:47,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:47,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:47,527 INFO L87 Difference]: Start difference. First operand 252 states and 409 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:49,532 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:49,701 INFO L93 Difference]: Finished difference Result 496 states and 808 transitions. [2021-12-17 03:05:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:49,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 95 [2021-12-17 03:05:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:49,703 INFO L225 Difference]: With dead ends: 496 [2021-12-17 03:05:49,703 INFO L226 Difference]: Without dead ends: 265 [2021-12-17 03:05:49,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:49,704 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 20 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:49,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 458 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:05:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-17 03:05:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 252. [2021-12-17 03:05:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6254980079681276) internal successors, (408), 251 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 408 transitions. [2021-12-17 03:05:49,708 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 408 transitions. Word has length 95 [2021-12-17 03:05:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:49,708 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 408 transitions. [2021-12-17 03:05:49,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 408 transitions. [2021-12-17 03:05:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-17 03:05:49,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:49,709 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:49,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:05:49,709 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:49,710 INFO L85 PathProgramCache]: Analyzing trace with hash -74791869, now seen corresponding path program 1 times [2021-12-17 03:05:49,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:49,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233759589] [2021-12-17 03:05:49,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:49,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:05:49,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:49,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233759589] [2021-12-17 03:05:49,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233759589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:49,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:49,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:49,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423654471] [2021-12-17 03:05:49,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:49,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:49,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:49,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:49,803 INFO L87 Difference]: Start difference. First operand 252 states and 408 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:51,809 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:51,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:51,982 INFO L93 Difference]: Finished difference Result 486 states and 794 transitions. [2021-12-17 03:05:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:51,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 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 96 [2021-12-17 03:05:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:51,984 INFO L225 Difference]: With dead ends: 486 [2021-12-17 03:05:51,984 INFO L226 Difference]: Without dead ends: 255 [2021-12-17 03:05:51,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:51,985 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 11 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:51,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 472 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:05:51,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-12-17 03:05:51,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2021-12-17 03:05:51,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6215139442231075) internal successors, (407), 251 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 407 transitions. [2021-12-17 03:05:51,989 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 407 transitions. Word has length 96 [2021-12-17 03:05:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:51,989 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 407 transitions. [2021-12-17 03:05:51,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:51,989 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 407 transitions. [2021-12-17 03:05:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-17 03:05:51,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:51,990 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:51,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 03:05:51,990 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:51,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1684502399, now seen corresponding path program 1 times [2021-12-17 03:05:51,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:51,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054951744] [2021-12-17 03:05:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:51,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:52,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:05:52,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:52,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054951744] [2021-12-17 03:05:52,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054951744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:52,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:52,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:52,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110320294] [2021-12-17 03:05:52,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:52,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:52,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:52,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:52,071 INFO L87 Difference]: Start difference. First operand 252 states and 407 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:54,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:54,271 INFO L93 Difference]: Finished difference Result 502 states and 814 transitions. [2021-12-17 03:05:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:54,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-17 03:05:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:54,272 INFO L225 Difference]: With dead ends: 502 [2021-12-17 03:05:54,273 INFO L226 Difference]: Without dead ends: 271 [2021-12-17 03:05:54,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:54,273 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 38 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:54,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 474 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:05:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-17 03:05:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 252. [2021-12-17 03:05:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6175298804780875) internal successors, (406), 251 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 406 transitions. [2021-12-17 03:05:54,278 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 406 transitions. Word has length 108 [2021-12-17 03:05:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:54,278 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 406 transitions. [2021-12-17 03:05:54,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 406 transitions. [2021-12-17 03:05:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-17 03:05:54,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:54,279 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:54,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:05:54,279 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1786617495, now seen corresponding path program 1 times [2021-12-17 03:05:54,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:54,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458133772] [2021-12-17 03:05:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:54,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:05:54,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:54,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458133772] [2021-12-17 03:05:54,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458133772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:54,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:54,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:54,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075008426] [2021-12-17 03:05:54,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:54,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:54,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:54,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:54,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:54,362 INFO L87 Difference]: Start difference. First operand 252 states and 406 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:56,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:56,560 INFO L93 Difference]: Finished difference Result 501 states and 811 transitions. [2021-12-17 03:05:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:56,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-17 03:05:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:56,561 INFO L225 Difference]: With dead ends: 501 [2021-12-17 03:05:56,561 INFO L226 Difference]: Without dead ends: 270 [2021-12-17 03:05:56,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:56,562 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 35 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:56,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 476 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:05:56,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-17 03:05:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 252. [2021-12-17 03:05:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6135458167330676) internal successors, (405), 251 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 405 transitions. [2021-12-17 03:05:56,567 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 405 transitions. Word has length 109 [2021-12-17 03:05:56,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:56,567 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 405 transitions. [2021-12-17 03:05:56,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 405 transitions. [2021-12-17 03:05:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 03:05:56,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:56,569 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:56,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 03:05:56,569 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:56,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1202868242, now seen corresponding path program 1 times [2021-12-17 03:05:56,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:56,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714286133] [2021-12-17 03:05:56,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:56,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:05:56,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:56,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714286133] [2021-12-17 03:05:56,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714286133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:56,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:56,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:56,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552880980] [2021-12-17 03:05:56,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:56,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:56,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:56,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:56,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:56,656 INFO L87 Difference]: Start difference. First operand 252 states and 405 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:58,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:05:58,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:05:58,935 INFO L93 Difference]: Finished difference Result 554 states and 881 transitions. [2021-12-17 03:05:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:05:58,936 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-17 03:05:58,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:05:58,937 INFO L225 Difference]: With dead ends: 554 [2021-12-17 03:05:58,937 INFO L226 Difference]: Without dead ends: 323 [2021-12-17 03:05:58,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:05:58,938 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 143 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:05:58,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 331 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:05:58,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-17 03:05:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 252. [2021-12-17 03:05:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.6015936254980079) internal successors, (402), 251 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 402 transitions. [2021-12-17 03:05:58,943 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 402 transitions. Word has length 110 [2021-12-17 03:05:58,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:05:58,943 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 402 transitions. [2021-12-17 03:05:58,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:05:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 402 transitions. [2021-12-17 03:05:58,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 03:05:58,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:05:58,944 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:05:58,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 03:05:58,944 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:05:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:05:58,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1803417690, now seen corresponding path program 1 times [2021-12-17 03:05:58,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:05:58,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471603626] [2021-12-17 03:05:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:05:58,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:05:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:05:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:05:59,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:05:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471603626] [2021-12-17 03:05:59,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471603626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:05:59,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:05:59,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:05:59,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522042729] [2021-12-17 03:05:59,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:05:59,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:05:59,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:05:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:05:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:05:59,015 INFO L87 Difference]: Start difference. First operand 252 states and 402 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:01,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:01,209 INFO L93 Difference]: Finished difference Result 500 states and 802 transitions. [2021-12-17 03:06:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:01,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-17 03:06:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:01,211 INFO L225 Difference]: With dead ends: 500 [2021-12-17 03:06:01,211 INFO L226 Difference]: Without dead ends: 269 [2021-12-17 03:06:01,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:01,212 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 39 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:01,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 478 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:06:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-17 03:06:01,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 252. [2021-12-17 03:06:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.597609561752988) internal successors, (401), 251 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 401 transitions. [2021-12-17 03:06:01,216 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 401 transitions. Word has length 110 [2021-12-17 03:06:01,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:01,216 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 401 transitions. [2021-12-17 03:06:01,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:01,217 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 401 transitions. [2021-12-17 03:06:01,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 03:06:01,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:01,218 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:01,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 03:06:01,218 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:01,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:01,218 INFO L85 PathProgramCache]: Analyzing trace with hash -664004846, now seen corresponding path program 1 times [2021-12-17 03:06:01,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:01,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143872332] [2021-12-17 03:06:01,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:01,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:06:01,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:01,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143872332] [2021-12-17 03:06:01,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143872332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:01,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:01,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:01,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617402378] [2021-12-17 03:06:01,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:01,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:01,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:01,300 INFO L87 Difference]: Start difference. First operand 252 states and 401 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:03,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:03,594 INFO L93 Difference]: Finished difference Result 554 states and 873 transitions. [2021-12-17 03:06:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 [2021-12-17 03:06:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:03,596 INFO L225 Difference]: With dead ends: 554 [2021-12-17 03:06:03,596 INFO L226 Difference]: Without dead ends: 323 [2021-12-17 03:06:03,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:03,596 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 140 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:03,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 331 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-17 03:06:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 252. [2021-12-17 03:06:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5856573705179282) internal successors, (398), 251 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 398 transitions. [2021-12-17 03:06:03,601 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 398 transitions. Word has length 111 [2021-12-17 03:06:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:03,601 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 398 transitions. [2021-12-17 03:06:03,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 398 transitions. [2021-12-17 03:06:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 03:06:03,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:03,602 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:03,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 03:06:03,602 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:03,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:03,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1948427051, now seen corresponding path program 1 times [2021-12-17 03:06:03,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:03,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623833249] [2021-12-17 03:06:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:03,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:06:03,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:03,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623833249] [2021-12-17 03:06:03,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623833249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:03,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:03,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:03,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099674587] [2021-12-17 03:06:03,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:03,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:03,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:03,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:03,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:03,667 INFO L87 Difference]: Start difference. First operand 252 states and 398 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:05,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:05,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:05,973 INFO L93 Difference]: Finished difference Result 554 states and 867 transitions. [2021-12-17 03:06:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:05,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-17 03:06:05,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:05,981 INFO L225 Difference]: With dead ends: 554 [2021-12-17 03:06:05,981 INFO L226 Difference]: Without dead ends: 323 [2021-12-17 03:06:05,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:05,982 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 138 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:05,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 331 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:05,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-12-17 03:06:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 252. [2021-12-17 03:06:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5737051792828685) internal successors, (395), 251 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 395 transitions. [2021-12-17 03:06:05,987 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 395 transitions. Word has length 112 [2021-12-17 03:06:05,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:05,988 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 395 transitions. [2021-12-17 03:06:05,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:05,988 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 395 transitions. [2021-12-17 03:06:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 03:06:05,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:05,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:05,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 03:06:05,989 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:05,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1315157961, now seen corresponding path program 1 times [2021-12-17 03:06:05,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:05,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383938799] [2021-12-17 03:06:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:05,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:06:06,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:06,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383938799] [2021-12-17 03:06:06,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383938799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:06,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:06,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:06,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530769777] [2021-12-17 03:06:06,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:06,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:06,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:06,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:06,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:06,073 INFO L87 Difference]: Start difference. First operand 252 states and 395 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:08,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:08,233 INFO L93 Difference]: Finished difference Result 490 states and 775 transitions. [2021-12-17 03:06:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:08,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-17 03:06:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:08,234 INFO L225 Difference]: With dead ends: 490 [2021-12-17 03:06:08,234 INFO L226 Difference]: Without dead ends: 259 [2021-12-17 03:06:08,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:08,235 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 26 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:08,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 492 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:06:08,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-17 03:06:08,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 252. [2021-12-17 03:06:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.5697211155378485) internal successors, (394), 251 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:08,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 394 transitions. [2021-12-17 03:06:08,239 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 394 transitions. Word has length 113 [2021-12-17 03:06:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:08,240 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 394 transitions. [2021-12-17 03:06:08,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 394 transitions. [2021-12-17 03:06:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 03:06:08,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:08,241 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:08,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 03:06:08,241 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:08,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1545905064, now seen corresponding path program 1 times [2021-12-17 03:06:08,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:08,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591604923] [2021-12-17 03:06:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:08,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 03:06:08,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:08,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591604923] [2021-12-17 03:06:08,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591604923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:08,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:08,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:08,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740705286] [2021-12-17 03:06:08,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:08,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:08,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:08,345 INFO L87 Difference]: Start difference. First operand 252 states and 394 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:10,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:10,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:10,558 INFO L93 Difference]: Finished difference Result 532 states and 834 transitions. [2021-12-17 03:06:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:10,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-17 03:06:10,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:10,559 INFO L225 Difference]: With dead ends: 532 [2021-12-17 03:06:10,559 INFO L226 Difference]: Without dead ends: 301 [2021-12-17 03:06:10,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:10,560 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 36 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:10,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 512 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 177 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:06:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-12-17 03:06:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 277. [2021-12-17 03:06:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.568840579710145) internal successors, (433), 276 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 433 transitions. [2021-12-17 03:06:10,565 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 433 transitions. Word has length 117 [2021-12-17 03:06:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:10,565 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 433 transitions. [2021-12-17 03:06:10,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 433 transitions. [2021-12-17 03:06:10,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 03:06:10,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:10,566 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:10,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 03:06:10,567 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1861839386, now seen corresponding path program 1 times [2021-12-17 03:06:10,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:10,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609153589] [2021-12-17 03:06:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:10,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:06:10,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:10,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609153589] [2021-12-17 03:06:10,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609153589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:10,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:10,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:10,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591744581] [2021-12-17 03:06:10,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:10,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:10,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:10,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:10,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:10,645 INFO L87 Difference]: Start difference. First operand 277 states and 433 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) [2021-12-17 03:06:12,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:12,918 INFO L93 Difference]: Finished difference Result 625 states and 981 transitions. [2021-12-17 03:06:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:12,919 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 [2021-12-17 03:06:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:12,920 INFO L225 Difference]: With dead ends: 625 [2021-12-17 03:06:12,920 INFO L226 Difference]: Without dead ends: 369 [2021-12-17 03:06:12,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:12,921 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 83 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:12,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 496 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:12,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-17 03:06:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 310. [2021-12-17 03:06:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.5792880258899675) internal successors, (488), 309 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 488 transitions. [2021-12-17 03:06:12,926 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 488 transitions. Word has length 117 [2021-12-17 03:06:12,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:12,926 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 488 transitions. [2021-12-17 03:06:12,926 INFO L471 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) [2021-12-17 03:06:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 488 transitions. [2021-12-17 03:06:12,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 03:06:12,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:12,927 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-17 03:06:12,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 03:06:12,927 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:12,928 INFO L85 PathProgramCache]: Analyzing trace with hash 187771396, now seen corresponding path program 1 times [2021-12-17 03:06:12,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:12,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798518764] [2021-12-17 03:06:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:12,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:06:13,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:13,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798518764] [2021-12-17 03:06:13,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798518764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:13,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:13,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:06:13,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054051770] [2021-12-17 03:06:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:13,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:06:13,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:13,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:06:13,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:06:13,026 INFO L87 Difference]: Start difference. First operand 310 states and 488 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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) [2021-12-17 03:06:13,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:13,049 INFO L93 Difference]: Finished difference Result 882 states and 1408 transitions. [2021-12-17 03:06:13,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:06:13,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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 128 [2021-12-17 03:06:13,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:13,051 INFO L225 Difference]: With dead ends: 882 [2021-12-17 03:06:13,051 INFO L226 Difference]: Without dead ends: 593 [2021-12-17 03:06:13,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:06:13,054 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 135 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:13,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 558 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:06:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-12-17 03:06:13,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2021-12-17 03:06:13,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.5861486486486487) internal successors, (939), 592 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 939 transitions. [2021-12-17 03:06:13,062 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 939 transitions. Word has length 128 [2021-12-17 03:06:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:13,063 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 939 transitions. [2021-12-17 03:06:13,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 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) [2021-12-17 03:06:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 939 transitions. [2021-12-17 03:06:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 03:06:13,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:13,064 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-17 03:06:13,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 03:06:13,065 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:13,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1081257734, now seen corresponding path program 1 times [2021-12-17 03:06:13,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:13,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583119329] [2021-12-17 03:06:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:13,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:06:13,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:13,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583119329] [2021-12-17 03:06:13,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583119329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:13,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:13,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:06:13,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297506340] [2021-12-17 03:06:13,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:13,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:06:13,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:13,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:06:13,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:06:13,148 INFO L87 Difference]: Start difference. First operand 593 states and 939 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:13,169 INFO L93 Difference]: Finished difference Result 1407 states and 2237 transitions. [2021-12-17 03:06:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:06:13,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-17 03:06:13,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:13,171 INFO L225 Difference]: With dead ends: 1407 [2021-12-17 03:06:13,171 INFO L226 Difference]: Without dead ends: 835 [2021-12-17 03:06:13,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:06:13,175 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 138 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:13,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 431 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:06:13,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-12-17 03:06:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 835. [2021-12-17 03:06:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 1.579136690647482) internal successors, (1317), 834 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1317 transitions. [2021-12-17 03:06:13,187 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1317 transitions. Word has length 128 [2021-12-17 03:06:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:13,187 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 1317 transitions. [2021-12-17 03:06:13,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:13,188 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1317 transitions. [2021-12-17 03:06:13,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 03:06:13,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:13,189 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-17 03:06:13,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 03:06:13,189 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:13,190 INFO L85 PathProgramCache]: Analyzing trace with hash 494981512, now seen corresponding path program 1 times [2021-12-17 03:06:13,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:13,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41726217] [2021-12-17 03:06:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:13,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 03:06:13,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:13,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41726217] [2021-12-17 03:06:13,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41726217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:13,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:13,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:06:13,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93296974] [2021-12-17 03:06:13,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:13,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:06:13,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:13,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:06:13,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:06:13,256 INFO L87 Difference]: Start difference. First operand 835 states and 1317 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:13,273 INFO L93 Difference]: Finished difference Result 1676 states and 2646 transitions. [2021-12-17 03:06:13,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:06:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-17 03:06:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:13,276 INFO L225 Difference]: With dead ends: 1676 [2021-12-17 03:06:13,276 INFO L226 Difference]: Without dead ends: 862 [2021-12-17 03:06:13,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:06:13,277 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 15 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:13,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 404 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:06:13,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-12-17 03:06:13,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2021-12-17 03:06:13,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.570267131242741) internal successors, (1352), 861 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1352 transitions. [2021-12-17 03:06:13,291 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1352 transitions. Word has length 128 [2021-12-17 03:06:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:13,291 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1352 transitions. [2021-12-17 03:06:13,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1352 transitions. [2021-12-17 03:06:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 03:06:13,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:13,293 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-17 03:06:13,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 03:06:13,293 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:13,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:13,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1646878966, now seen corresponding path program 1 times [2021-12-17 03:06:13,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:13,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098530777] [2021-12-17 03:06:13,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:13,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 03:06:13,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:13,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098530777] [2021-12-17 03:06:13,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098530777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:13,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:13,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:06:13,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539197102] [2021-12-17 03:06:13,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:13,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:06:13,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:06:13,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:06:13,365 INFO L87 Difference]: Start difference. First operand 862 states and 1352 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:13,379 INFO L93 Difference]: Finished difference Result 1705 states and 2682 transitions. [2021-12-17 03:06:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:06:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-17 03:06:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:13,381 INFO L225 Difference]: With dead ends: 1705 [2021-12-17 03:06:13,381 INFO L226 Difference]: Without dead ends: 864 [2021-12-17 03:06:13,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:06:13,383 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 4 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:13,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 383 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:06:13,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-12-17 03:06:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 864. [2021-12-17 03:06:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 1.5689455388180764) internal successors, (1354), 863 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:13,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1354 transitions. [2021-12-17 03:06:13,401 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1354 transitions. Word has length 128 [2021-12-17 03:06:13,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:13,401 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 1354 transitions. [2021-12-17 03:06:13,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:13,402 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1354 transitions. [2021-12-17 03:06:13,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-17 03:06:13,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:13,403 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:13,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 03:06:13,404 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1600457521, now seen corresponding path program 1 times [2021-12-17 03:06:13,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:13,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116771786] [2021-12-17 03:06:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:13,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-17 03:06:13,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:13,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116771786] [2021-12-17 03:06:13,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116771786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:13,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:13,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:13,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089816398] [2021-12-17 03:06:13,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:13,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:13,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:13,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:13,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:13,521 INFO L87 Difference]: Start difference. First operand 864 states and 1354 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:15,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:15,853 INFO L93 Difference]: Finished difference Result 2038 states and 3176 transitions. [2021-12-17 03:06:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:15,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 197 [2021-12-17 03:06:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:15,857 INFO L225 Difference]: With dead ends: 2038 [2021-12-17 03:06:15,857 INFO L226 Difference]: Without dead ends: 1197 [2021-12-17 03:06:15,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:15,859 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 111 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:15,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 321 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-12-17 03:06:15,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 984. [2021-12-17 03:06:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.5859613428280772) internal successors, (1559), 983 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1559 transitions. [2021-12-17 03:06:15,875 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1559 transitions. Word has length 197 [2021-12-17 03:06:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:15,876 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1559 transitions. [2021-12-17 03:06:15,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1559 transitions. [2021-12-17 03:06:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-17 03:06:15,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:15,878 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:15,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 03:06:15,878 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash -332455056, now seen corresponding path program 1 times [2021-12-17 03:06:15,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:15,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938187310] [2021-12-17 03:06:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:15,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:15,989 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-17 03:06:15,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:15,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938187310] [2021-12-17 03:06:15,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938187310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:15,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:15,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:15,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419715753] [2021-12-17 03:06:15,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:15,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:15,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:15,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:15,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:15,991 INFO L87 Difference]: Start difference. First operand 984 states and 1559 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:17,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:18,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:18,335 INFO L93 Difference]: Finished difference Result 2056 states and 3232 transitions. [2021-12-17 03:06:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 198 [2021-12-17 03:06:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:18,339 INFO L225 Difference]: With dead ends: 2056 [2021-12-17 03:06:18,339 INFO L226 Difference]: Without dead ends: 1095 [2021-12-17 03:06:18,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:18,341 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 80 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:18,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 629 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 275 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-12-17 03:06:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 984. [2021-12-17 03:06:18,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.5839267548321465) internal successors, (1557), 983 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1557 transitions. [2021-12-17 03:06:18,373 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1557 transitions. Word has length 198 [2021-12-17 03:06:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:18,373 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1557 transitions. [2021-12-17 03:06:18,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1557 transitions. [2021-12-17 03:06:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-17 03:06:18,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:18,375 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:18,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 03:06:18,375 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:18,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:18,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2066283644, now seen corresponding path program 1 times [2021-12-17 03:06:18,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:18,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72580679] [2021-12-17 03:06:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:18,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:18,464 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 269 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 03:06:18,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:18,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72580679] [2021-12-17 03:06:18,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72580679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:18,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:18,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:18,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258958845] [2021-12-17 03:06:18,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:18,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:18,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:18,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:18,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:18,466 INFO L87 Difference]: Start difference. First operand 984 states and 1557 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:20,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:20,749 INFO L93 Difference]: Finished difference Result 2162 states and 3411 transitions. [2021-12-17 03:06:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:20,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 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 211 [2021-12-17 03:06:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:20,752 INFO L225 Difference]: With dead ends: 2162 [2021-12-17 03:06:20,752 INFO L226 Difference]: Without dead ends: 1201 [2021-12-17 03:06:20,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:20,754 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 57 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:20,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 585 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:20,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-12-17 03:06:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1080. [2021-12-17 03:06:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 1.5931417979610751) internal successors, (1719), 1079 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1719 transitions. [2021-12-17 03:06:20,768 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1719 transitions. Word has length 211 [2021-12-17 03:06:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:20,768 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1719 transitions. [2021-12-17 03:06:20,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1719 transitions. [2021-12-17 03:06:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-12-17 03:06:20,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:20,770 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:20,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 03:06:20,771 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:20,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:20,771 INFO L85 PathProgramCache]: Analyzing trace with hash -406783266, now seen corresponding path program 1 times [2021-12-17 03:06:20,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:20,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792921382] [2021-12-17 03:06:20,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:20,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:06:20,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:20,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792921382] [2021-12-17 03:06:20,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792921382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:20,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:20,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:20,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195963621] [2021-12-17 03:06:20,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:20,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:20,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:20,873 INFO L87 Difference]: Start difference. First operand 1080 states and 1719 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:22,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:23,179 INFO L93 Difference]: Finished difference Result 2246 states and 3550 transitions. [2021-12-17 03:06:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 212 [2021-12-17 03:06:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:23,183 INFO L225 Difference]: With dead ends: 2246 [2021-12-17 03:06:23,183 INFO L226 Difference]: Without dead ends: 1189 [2021-12-17 03:06:23,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:23,184 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 101 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:23,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 627 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-12-17 03:06:23,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1080. [2021-12-17 03:06:23,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 1.5912882298424467) internal successors, (1717), 1079 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1717 transitions. [2021-12-17 03:06:23,197 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1717 transitions. Word has length 212 [2021-12-17 03:06:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:23,198 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1717 transitions. [2021-12-17 03:06:23,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1717 transitions. [2021-12-17 03:06:23,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-17 03:06:23,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:23,201 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:23,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 03:06:23,201 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:23,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:23,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1485610527, now seen corresponding path program 1 times [2021-12-17 03:06:23,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:23,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163269856] [2021-12-17 03:06:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:23,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-17 03:06:23,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:23,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163269856] [2021-12-17 03:06:23,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163269856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:23,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:23,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:23,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725792720] [2021-12-17 03:06:23,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:23,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:23,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:23,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:23,328 INFO L87 Difference]: Start difference. First operand 1080 states and 1717 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:25,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:25,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:25,533 INFO L93 Difference]: Finished difference Result 2221 states and 3524 transitions. [2021-12-17 03:06:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:25,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 213 [2021-12-17 03:06:25,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:25,536 INFO L225 Difference]: With dead ends: 2221 [2021-12-17 03:06:25,536 INFO L226 Difference]: Without dead ends: 1164 [2021-12-17 03:06:25,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:25,538 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 19 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:25,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 540 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:06:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-12-17 03:06:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1128. [2021-12-17 03:06:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.5847382431233363) internal successors, (1786), 1127 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:25,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1786 transitions. [2021-12-17 03:06:25,552 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1786 transitions. Word has length 213 [2021-12-17 03:06:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:25,553 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1786 transitions. [2021-12-17 03:06:25,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:25,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1786 transitions. [2021-12-17 03:06:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-17 03:06:25,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:25,555 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:25,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 03:06:25,555 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:25,556 INFO L85 PathProgramCache]: Analyzing trace with hash -684567724, now seen corresponding path program 1 times [2021-12-17 03:06:25,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:25,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91559697] [2021-12-17 03:06:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:25,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:06:25,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:25,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91559697] [2021-12-17 03:06:25,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91559697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:25,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:25,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:25,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073140094] [2021-12-17 03:06:25,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:25,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:25,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:25,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:25,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:25,655 INFO L87 Difference]: Start difference. First operand 1128 states and 1786 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:27,667 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:27,967 INFO L93 Difference]: Finished difference Result 2342 states and 3684 transitions. [2021-12-17 03:06:27,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:27,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 214 [2021-12-17 03:06:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:27,974 INFO L225 Difference]: With dead ends: 2342 [2021-12-17 03:06:27,974 INFO L226 Difference]: Without dead ends: 1237 [2021-12-17 03:06:27,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:27,976 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 106 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:27,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 625 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 272 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-12-17 03:06:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1128. [2021-12-17 03:06:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.582963620230701) internal successors, (1784), 1127 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1784 transitions. [2021-12-17 03:06:28,012 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1784 transitions. Word has length 214 [2021-12-17 03:06:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:28,012 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1784 transitions. [2021-12-17 03:06:28,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1784 transitions. [2021-12-17 03:06:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-12-17 03:06:28,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:28,015 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:28,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 03:06:28,015 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1845256553, now seen corresponding path program 1 times [2021-12-17 03:06:28,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:28,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880064121] [2021-12-17 03:06:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:28,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 239 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:06:28,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:28,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880064121] [2021-12-17 03:06:28,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880064121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:28,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:28,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:28,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525739737] [2021-12-17 03:06:28,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:28,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:28,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:28,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:28,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:28,114 INFO L87 Difference]: Start difference. First operand 1128 states and 1784 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:30,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:30,401 INFO L93 Difference]: Finished difference Result 2322 states and 3654 transitions. [2021-12-17 03:06:30,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:30,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 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 217 [2021-12-17 03:06:30,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:30,405 INFO L225 Difference]: With dead ends: 2322 [2021-12-17 03:06:30,405 INFO L226 Difference]: Without dead ends: 1217 [2021-12-17 03:06:30,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:30,406 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 95 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:30,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 611 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:30,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-12-17 03:06:30,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1128. [2021-12-17 03:06:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.5811889973380657) internal successors, (1782), 1127 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) [2021-12-17 03:06:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1782 transitions. [2021-12-17 03:06:30,433 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1782 transitions. Word has length 217 [2021-12-17 03:06:30,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:30,434 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1782 transitions. [2021-12-17 03:06:30,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1782 transitions. [2021-12-17 03:06:30,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-17 03:06:30,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:30,436 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 03:06:30,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 03:06:30,436 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:30,437 INFO L85 PathProgramCache]: Analyzing trace with hash 736609869, now seen corresponding path program 1 times [2021-12-17 03:06:30,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:30,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134896592] [2021-12-17 03:06:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:30,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:06:30,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:30,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134896592] [2021-12-17 03:06:30,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134896592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:30,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:30,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:30,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401046710] [2021-12-17 03:06:30,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:30,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:30,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:30,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:30,612 INFO L87 Difference]: Start difference. First operand 1128 states and 1782 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:32,617 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:32,906 INFO L93 Difference]: Finished difference Result 2322 states and 3650 transitions. [2021-12-17 03:06:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:32,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-12-17 03:06:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:32,909 INFO L225 Difference]: With dead ends: 2322 [2021-12-17 03:06:32,909 INFO L226 Difference]: Without dead ends: 1217 [2021-12-17 03:06:32,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:32,911 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 87 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:32,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 609 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-12-17 03:06:32,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1128. [2021-12-17 03:06:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.5794143744454303) internal successors, (1780), 1127 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1780 transitions. [2021-12-17 03:06:32,925 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1780 transitions. Word has length 220 [2021-12-17 03:06:32,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:32,926 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1780 transitions. [2021-12-17 03:06:32,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:32,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1780 transitions. [2021-12-17 03:06:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-17 03:06:32,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:32,928 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:32,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 03:06:32,928 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:32,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1852088293, now seen corresponding path program 1 times [2021-12-17 03:06:32,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:32,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524127650] [2021-12-17 03:06:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:32,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:06:33,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:33,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524127650] [2021-12-17 03:06:33,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524127650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:33,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:33,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:33,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840161805] [2021-12-17 03:06:33,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:33,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:33,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:33,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:33,026 INFO L87 Difference]: Start difference. First operand 1128 states and 1780 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:35,039 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:35,336 INFO L93 Difference]: Finished difference Result 2437 states and 3803 transitions. [2021-12-17 03:06:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:35,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 220 [2021-12-17 03:06:35,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:35,355 INFO L225 Difference]: With dead ends: 2437 [2021-12-17 03:06:35,355 INFO L226 Difference]: Without dead ends: 1332 [2021-12-17 03:06:35,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:35,356 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 126 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:35,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 378 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-12-17 03:06:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1128. [2021-12-17 03:06:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.566992014196983) internal successors, (1766), 1127 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1766 transitions. [2021-12-17 03:06:35,372 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1766 transitions. Word has length 220 [2021-12-17 03:06:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:35,372 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1766 transitions. [2021-12-17 03:06:35,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1766 transitions. [2021-12-17 03:06:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-17 03:06:35,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:35,375 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:35,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 03:06:35,375 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:35,375 INFO L85 PathProgramCache]: Analyzing trace with hash 913882631, now seen corresponding path program 1 times [2021-12-17 03:06:35,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:35,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462842649] [2021-12-17 03:06:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:35,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 287 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:06:35,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:35,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462842649] [2021-12-17 03:06:35,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462842649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:35,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:35,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:35,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027161925] [2021-12-17 03:06:35,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:35,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:35,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:35,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:35,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:35,481 INFO L87 Difference]: Start difference. First operand 1128 states and 1766 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:37,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:37,789 INFO L93 Difference]: Finished difference Result 2437 states and 3775 transitions. [2021-12-17 03:06:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 221 [2021-12-17 03:06:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:37,792 INFO L225 Difference]: With dead ends: 2437 [2021-12-17 03:06:37,792 INFO L226 Difference]: Without dead ends: 1332 [2021-12-17 03:06:37,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:37,793 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 127 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:37,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 319 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:37,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-12-17 03:06:37,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1128. [2021-12-17 03:06:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.551907719609583) internal successors, (1749), 1127 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1749 transitions. [2021-12-17 03:06:37,809 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1749 transitions. Word has length 221 [2021-12-17 03:06:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:37,809 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1749 transitions. [2021-12-17 03:06:37,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1749 transitions. [2021-12-17 03:06:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-17 03:06:37,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:37,811 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:37,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 03:06:37,811 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:37,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:37,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1778504501, now seen corresponding path program 1 times [2021-12-17 03:06:37,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:37,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942116825] [2021-12-17 03:06:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:37,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:37,902 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:06:37,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:37,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942116825] [2021-12-17 03:06:37,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942116825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:37,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:37,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:37,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722032748] [2021-12-17 03:06:37,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:37,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:37,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:37,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:37,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:37,905 INFO L87 Difference]: Start difference. First operand 1128 states and 1749 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:39,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:40,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:40,161 INFO L93 Difference]: Finished difference Result 2304 states and 3560 transitions. [2021-12-17 03:06:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:40,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 221 [2021-12-17 03:06:40,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:40,167 INFO L225 Difference]: With dead ends: 2304 [2021-12-17 03:06:40,167 INFO L226 Difference]: Without dead ends: 1199 [2021-12-17 03:06:40,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:40,168 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 73 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:40,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 591 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:06:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-12-17 03:06:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1128. [2021-12-17 03:06:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.5501330967169475) internal successors, (1747), 1127 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1747 transitions. [2021-12-17 03:06:40,187 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1747 transitions. Word has length 221 [2021-12-17 03:06:40,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:40,187 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1747 transitions. [2021-12-17 03:06:40,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:40,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1747 transitions. [2021-12-17 03:06:40,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-17 03:06:40,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:40,189 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:40,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 03:06:40,190 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:40,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:40,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2105867705, now seen corresponding path program 1 times [2021-12-17 03:06:40,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:40,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603572607] [2021-12-17 03:06:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:40,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 302 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:06:40,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:40,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603572607] [2021-12-17 03:06:40,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603572607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:40,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:40,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:40,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445729930] [2021-12-17 03:06:40,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:40,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:40,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:40,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:40,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:40,283 INFO L87 Difference]: Start difference. First operand 1128 states and 1747 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:42,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:42,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:42,568 INFO L93 Difference]: Finished difference Result 2304 states and 3556 transitions. [2021-12-17 03:06:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:42,568 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 223 [2021-12-17 03:06:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:42,571 INFO L225 Difference]: With dead ends: 2304 [2021-12-17 03:06:42,571 INFO L226 Difference]: Without dead ends: 1199 [2021-12-17 03:06:42,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:42,572 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 69 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:42,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 589 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:42,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-12-17 03:06:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1128. [2021-12-17 03:06:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.5483584738243124) internal successors, (1745), 1127 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1745 transitions. [2021-12-17 03:06:42,585 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1745 transitions. Word has length 223 [2021-12-17 03:06:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:42,585 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1745 transitions. [2021-12-17 03:06:42,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1745 transitions. [2021-12-17 03:06:42,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-17 03:06:42,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:42,621 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:42,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 03:06:42,621 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:42,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:42,622 INFO L85 PathProgramCache]: Analyzing trace with hash 308872607, now seen corresponding path program 1 times [2021-12-17 03:06:42,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:42,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346790203] [2021-12-17 03:06:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:42,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 306 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:06:42,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:42,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346790203] [2021-12-17 03:06:42,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346790203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:42,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:42,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:42,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275343661] [2021-12-17 03:06:42,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:42,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:42,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:42,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:42,777 INFO L87 Difference]: Start difference. First operand 1128 states and 1745 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:44,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:45,051 INFO L93 Difference]: Finished difference Result 2437 states and 3733 transitions. [2021-12-17 03:06:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:45,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 224 [2021-12-17 03:06:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:45,059 INFO L225 Difference]: With dead ends: 2437 [2021-12-17 03:06:45,059 INFO L226 Difference]: Without dead ends: 1332 [2021-12-17 03:06:45,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:45,060 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 120 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:45,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 319 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:45,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-12-17 03:06:45,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1128. [2021-12-17 03:06:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.5359361135758651) internal successors, (1731), 1127 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1731 transitions. [2021-12-17 03:06:45,074 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1731 transitions. Word has length 224 [2021-12-17 03:06:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:45,074 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1731 transitions. [2021-12-17 03:06:45,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1731 transitions. [2021-12-17 03:06:45,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-17 03:06:45,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:45,077 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:45,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 03:06:45,077 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:45,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2108420374, now seen corresponding path program 1 times [2021-12-17 03:06:45,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:45,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888418786] [2021-12-17 03:06:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:45,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2021-12-17 03:06:45,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:45,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888418786] [2021-12-17 03:06:45,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888418786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:45,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:45,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:45,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463932413] [2021-12-17 03:06:45,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:45,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:45,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:45,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:45,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:45,163 INFO L87 Difference]: Start difference. First operand 1128 states and 1731 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:47,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:47,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:47,439 INFO L93 Difference]: Finished difference Result 2431 states and 3699 transitions. [2021-12-17 03:06:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:47,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-12-17 03:06:47,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:47,442 INFO L225 Difference]: With dead ends: 2431 [2021-12-17 03:06:47,442 INFO L226 Difference]: Without dead ends: 1326 [2021-12-17 03:06:47,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:47,443 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 132 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:47,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 323 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-12-17 03:06:47,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1128. [2021-12-17 03:06:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 1.520851818988465) internal successors, (1714), 1127 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1714 transitions. [2021-12-17 03:06:47,457 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1714 transitions. Word has length 225 [2021-12-17 03:06:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:47,457 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1714 transitions. [2021-12-17 03:06:47,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:47,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1714 transitions. [2021-12-17 03:06:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-12-17 03:06:47,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:47,459 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:47,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 03:06:47,460 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash -846691226, now seen corresponding path program 1 times [2021-12-17 03:06:47,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:47,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322907411] [2021-12-17 03:06:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:47,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:06:47,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:47,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322907411] [2021-12-17 03:06:47,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322907411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:47,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:47,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:47,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438753863] [2021-12-17 03:06:47,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:47,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:47,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:47,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:47,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:47,550 INFO L87 Difference]: Start difference. First operand 1128 states and 1714 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:49,567 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:49,853 INFO L93 Difference]: Finished difference Result 2563 states and 3878 transitions. [2021-12-17 03:06:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:49,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 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 226 [2021-12-17 03:06:49,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:49,856 INFO L225 Difference]: With dead ends: 2563 [2021-12-17 03:06:49,856 INFO L226 Difference]: Without dead ends: 1458 [2021-12-17 03:06:49,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:49,857 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 122 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:49,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 319 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-12-17 03:06:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1206. [2021-12-17 03:06:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 1.5103734439834025) internal successors, (1820), 1205 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:49,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1820 transitions. [2021-12-17 03:06:49,872 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1820 transitions. Word has length 226 [2021-12-17 03:06:49,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:49,872 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 1820 transitions. [2021-12-17 03:06:49,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:49,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1820 transitions. [2021-12-17 03:06:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-17 03:06:49,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:49,875 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:49,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 03:06:49,875 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1286109344, now seen corresponding path program 1 times [2021-12-17 03:06:49,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:49,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096815244] [2021-12-17 03:06:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:49,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:49,990 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-17 03:06:49,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:49,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096815244] [2021-12-17 03:06:49,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096815244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:49,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:49,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:49,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268375046] [2021-12-17 03:06:49,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:49,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:49,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:49,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:49,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:49,993 INFO L87 Difference]: Start difference. First operand 1206 states and 1820 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:52,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:52,299 INFO L93 Difference]: Finished difference Result 2593 states and 3883 transitions. [2021-12-17 03:06:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:52,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 227 [2021-12-17 03:06:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:52,301 INFO L225 Difference]: With dead ends: 2593 [2021-12-17 03:06:52,301 INFO L226 Difference]: Without dead ends: 1410 [2021-12-17 03:06:52,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:52,302 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 121 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:52,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 321 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2021-12-17 03:06:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1206. [2021-12-17 03:06:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 1.4987551867219917) internal successors, (1806), 1205 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1806 transitions. [2021-12-17 03:06:52,341 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1806 transitions. Word has length 227 [2021-12-17 03:06:52,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:52,341 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 1806 transitions. [2021-12-17 03:06:52,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1806 transitions. [2021-12-17 03:06:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-12-17 03:06:52,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:52,344 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-12-17 03:06:52,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 03:06:52,344 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:52,344 INFO L85 PathProgramCache]: Analyzing trace with hash 403987051, now seen corresponding path program 2 times [2021-12-17 03:06:52,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:52,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108163995] [2021-12-17 03:06:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:52,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-17 03:06:52,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:52,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108163995] [2021-12-17 03:06:52,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108163995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:52,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:52,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:52,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157771044] [2021-12-17 03:06:52,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:52,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:52,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:52,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:52,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:52,428 INFO L87 Difference]: Start difference. First operand 1206 states and 1806 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:54,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:54,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:54,726 INFO L93 Difference]: Finished difference Result 2824 states and 4230 transitions. [2021-12-17 03:06:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:54,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 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 227 [2021-12-17 03:06:54,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:54,729 INFO L225 Difference]: With dead ends: 2824 [2021-12-17 03:06:54,729 INFO L226 Difference]: Without dead ends: 1641 [2021-12-17 03:06:54,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:54,730 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 113 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:54,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 325 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:06:54,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-12-17 03:06:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1300. [2021-12-17 03:06:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 1.4980754426481908) internal successors, (1946), 1299 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1946 transitions. [2021-12-17 03:06:54,747 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1946 transitions. Word has length 227 [2021-12-17 03:06:54,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:54,747 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 1946 transitions. [2021-12-17 03:06:54,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:54,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1946 transitions. [2021-12-17 03:06:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-12-17 03:06:54,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:54,749 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:54,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 03:06:54,750 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:54,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:54,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1121415773, now seen corresponding path program 1 times [2021-12-17 03:06:54,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:54,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961397806] [2021-12-17 03:06:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:54,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-17 03:06:54,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:54,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961397806] [2021-12-17 03:06:54,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961397806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:54,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:54,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:54,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220901376] [2021-12-17 03:06:54,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:54,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:54,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:54,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:54,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:54,846 INFO L87 Difference]: Start difference. First operand 1300 states and 1946 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:56,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:57,060 INFO L93 Difference]: Finished difference Result 2616 states and 3908 transitions. [2021-12-17 03:06:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:57,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 240 [2021-12-17 03:06:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:57,062 INFO L225 Difference]: With dead ends: 2616 [2021-12-17 03:06:57,062 INFO L226 Difference]: Without dead ends: 1339 [2021-12-17 03:06:57,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:57,063 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 46 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:57,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 559 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:06:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-12-17 03:06:57,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1300. [2021-12-17 03:06:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 1.4965357967667436) internal successors, (1944), 1299 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1944 transitions. [2021-12-17 03:06:57,092 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1944 transitions. Word has length 240 [2021-12-17 03:06:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:57,094 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 1944 transitions. [2021-12-17 03:06:57,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1944 transitions. [2021-12-17 03:06:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-17 03:06:57,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:57,096 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:57,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 03:06:57,096 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:57,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:57,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1824064894, now seen corresponding path program 1 times [2021-12-17 03:06:57,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:57,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040424189] [2021-12-17 03:06:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:57,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-17 03:06:57,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040424189] [2021-12-17 03:06:57,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040424189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:57,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:57,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:57,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297354191] [2021-12-17 03:06:57,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:57,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:57,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:57,181 INFO L87 Difference]: Start difference. First operand 1300 states and 1944 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:59,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:06:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:06:59,416 INFO L93 Difference]: Finished difference Result 2608 states and 3894 transitions. [2021-12-17 03:06:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:06:59,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 241 [2021-12-17 03:06:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:06:59,418 INFO L225 Difference]: With dead ends: 2608 [2021-12-17 03:06:59,418 INFO L226 Difference]: Without dead ends: 1331 [2021-12-17 03:06:59,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:06:59,419 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 41 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:06:59,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 551 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:06:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-12-17 03:06:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1300. [2021-12-17 03:06:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 1.4949961508852965) internal successors, (1942), 1299 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:59,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 1942 transitions. [2021-12-17 03:06:59,434 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 1942 transitions. Word has length 241 [2021-12-17 03:06:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:06:59,434 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 1942 transitions. [2021-12-17 03:06:59,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:06:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 1942 transitions. [2021-12-17 03:06:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-17 03:06:59,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:06:59,437 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:06:59,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 03:06:59,437 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:06:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:06:59,437 INFO L85 PathProgramCache]: Analyzing trace with hash 487977681, now seen corresponding path program 1 times [2021-12-17 03:06:59,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:06:59,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836064035] [2021-12-17 03:06:59,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:06:59,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:06:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:06:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-17 03:06:59,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:06:59,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836064035] [2021-12-17 03:06:59,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836064035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:06:59,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:06:59,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:06:59,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673419475] [2021-12-17 03:06:59,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:06:59,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:06:59,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:06:59,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:06:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:06:59,555 INFO L87 Difference]: Start difference. First operand 1300 states and 1942 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:01,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:01,878 INFO L93 Difference]: Finished difference Result 2907 states and 4325 transitions. [2021-12-17 03:07:01,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:01,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 241 [2021-12-17 03:07:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:01,883 INFO L225 Difference]: With dead ends: 2907 [2021-12-17 03:07:01,883 INFO L226 Difference]: Without dead ends: 1630 [2021-12-17 03:07:01,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:01,885 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 112 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:01,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 313 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:07:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-12-17 03:07:01,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1405. [2021-12-17 03:07:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 1.4928774928774928) internal successors, (2096), 1404 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2096 transitions. [2021-12-17 03:07:01,916 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2096 transitions. Word has length 241 [2021-12-17 03:07:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:01,916 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 2096 transitions. [2021-12-17 03:07:01,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:01,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2096 transitions. [2021-12-17 03:07:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-17 03:07:01,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:01,919 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:07:01,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 03:07:01,920 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:01,920 INFO L85 PathProgramCache]: Analyzing trace with hash 167765298, now seen corresponding path program 1 times [2021-12-17 03:07:01,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:01,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496307312] [2021-12-17 03:07:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:01,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-12-17 03:07:02,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:02,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496307312] [2021-12-17 03:07:02,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496307312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:02,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:02,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:02,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872379781] [2021-12-17 03:07:02,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:02,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:02,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:02,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:02,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:02,012 INFO L87 Difference]: Start difference. First operand 1405 states and 2096 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:04,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:04,314 INFO L93 Difference]: Finished difference Result 2991 states and 4435 transitions. [2021-12-17 03:07:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 242 [2021-12-17 03:07:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:04,316 INFO L225 Difference]: With dead ends: 2991 [2021-12-17 03:07:04,316 INFO L226 Difference]: Without dead ends: 1609 [2021-12-17 03:07:04,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:04,318 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 111 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:04,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 313 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:07:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-12-17 03:07:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1405. [2021-12-17 03:07:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 1.4871794871794872) internal successors, (2088), 1404 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2088 transitions. [2021-12-17 03:07:04,338 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2088 transitions. Word has length 242 [2021-12-17 03:07:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:04,338 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 2088 transitions. [2021-12-17 03:07:04,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2088 transitions. [2021-12-17 03:07:04,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-17 03:07:04,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:04,340 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:07:04,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-17 03:07:04,340 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:04,340 INFO L85 PathProgramCache]: Analyzing trace with hash 303248757, now seen corresponding path program 1 times [2021-12-17 03:07:04,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:04,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23322664] [2021-12-17 03:07:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:04,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-17 03:07:04,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:04,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23322664] [2021-12-17 03:07:04,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23322664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:04,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:04,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:04,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001235956] [2021-12-17 03:07:04,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:04,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:04,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:04,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:04,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:04,436 INFO L87 Difference]: Start difference. First operand 1405 states and 2088 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:06,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:06,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:06,648 INFO L93 Difference]: Finished difference Result 2814 states and 4178 transitions. [2021-12-17 03:07:06,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:06,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 242 [2021-12-17 03:07:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:06,650 INFO L225 Difference]: With dead ends: 2814 [2021-12-17 03:07:06,650 INFO L226 Difference]: Without dead ends: 1432 [2021-12-17 03:07:06,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:06,651 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 34 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:06,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 543 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:07:06,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-12-17 03:07:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1405. [2021-12-17 03:07:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 1.4857549857549857) internal successors, (2086), 1404 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2086 transitions. [2021-12-17 03:07:06,669 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2086 transitions. Word has length 242 [2021-12-17 03:07:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:06,669 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 2086 transitions. [2021-12-17 03:07:06,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2086 transitions. [2021-12-17 03:07:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-17 03:07:06,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:06,672 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:07:06,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-17 03:07:06,672 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:06,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1726554156, now seen corresponding path program 1 times [2021-12-17 03:07:06,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:06,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185179585] [2021-12-17 03:07:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:06,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 355 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-17 03:07:06,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:06,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185179585] [2021-12-17 03:07:06,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185179585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:06,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:06,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:06,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019794241] [2021-12-17 03:07:06,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:06,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:06,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:06,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:06,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:06,775 INFO L87 Difference]: Start difference. First operand 1405 states and 2086 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:08,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:08,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:08,980 INFO L93 Difference]: Finished difference Result 2810 states and 4170 transitions. [2021-12-17 03:07:08,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:08,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-12-17 03:07:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:08,982 INFO L225 Difference]: With dead ends: 2810 [2021-12-17 03:07:08,982 INFO L226 Difference]: Without dead ends: 1428 [2021-12-17 03:07:08,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:08,984 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 31 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:08,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 539 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:07:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-12-17 03:07:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1405. [2021-12-17 03:07:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1404 states have (on average 1.4843304843304843) internal successors, (2084), 1404 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2084 transitions. [2021-12-17 03:07:09,010 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2084 transitions. Word has length 243 [2021-12-17 03:07:09,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:09,010 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 2084 transitions. [2021-12-17 03:07:09,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2084 transitions. [2021-12-17 03:07:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-17 03:07:09,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:09,012 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-12-17 03:07:09,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-17 03:07:09,012 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:09,012 INFO L85 PathProgramCache]: Analyzing trace with hash 889539299, now seen corresponding path program 1 times [2021-12-17 03:07:09,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:09,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394915648] [2021-12-17 03:07:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:09,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-17 03:07:09,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:09,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394915648] [2021-12-17 03:07:09,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394915648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:09,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:09,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:09,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116369666] [2021-12-17 03:07:09,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:09,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:09,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:09,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:09,123 INFO L87 Difference]: Start difference. First operand 1405 states and 2084 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:11,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:11,417 INFO L93 Difference]: Finished difference Result 3117 states and 4603 transitions. [2021-12-17 03:07:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:11,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 248 [2021-12-17 03:07:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:11,420 INFO L225 Difference]: With dead ends: 3117 [2021-12-17 03:07:11,420 INFO L226 Difference]: Without dead ends: 1735 [2021-12-17 03:07:11,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:11,421 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 119 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:11,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 350 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:07:11,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-12-17 03:07:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1462. [2021-12-17 03:07:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 1.463381245722108) internal successors, (2138), 1461 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:11,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2138 transitions. [2021-12-17 03:07:11,451 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2138 transitions. Word has length 248 [2021-12-17 03:07:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:11,452 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 2138 transitions. [2021-12-17 03:07:11,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:11,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2138 transitions. [2021-12-17 03:07:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-17 03:07:11,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:11,454 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:07:11,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-17 03:07:11,456 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1376652190, now seen corresponding path program 1 times [2021-12-17 03:07:11,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:11,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254521563] [2021-12-17 03:07:11,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:11,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 350 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-17 03:07:11,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:11,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254521563] [2021-12-17 03:07:11,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254521563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:11,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:11,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:11,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621953587] [2021-12-17 03:07:11,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:11,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:11,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:11,569 INFO L87 Difference]: Start difference. First operand 1462 states and 2138 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:13,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:13,771 INFO L93 Difference]: Finished difference Result 2924 states and 4274 transitions. [2021-12-17 03:07:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:13,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 249 [2021-12-17 03:07:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:13,773 INFO L225 Difference]: With dead ends: 2924 [2021-12-17 03:07:13,773 INFO L226 Difference]: Without dead ends: 1485 [2021-12-17 03:07:13,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:13,774 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 47 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:13,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 535 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:07:13,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-12-17 03:07:13,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1462. [2021-12-17 03:07:13,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 1.462012320328542) internal successors, (2136), 1461 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2136 transitions. [2021-12-17 03:07:13,803 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2136 transitions. Word has length 249 [2021-12-17 03:07:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:13,803 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 2136 transitions. [2021-12-17 03:07:13,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2136 transitions. [2021-12-17 03:07:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-17 03:07:13,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:13,805 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:07:13,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-17 03:07:13,806 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:13,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:13,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1944455608, now seen corresponding path program 1 times [2021-12-17 03:07:13,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:13,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047512218] [2021-12-17 03:07:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:13,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-17 03:07:13,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:13,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047512218] [2021-12-17 03:07:13,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047512218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:13,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:13,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:13,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143504218] [2021-12-17 03:07:13,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:13,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:13,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:13,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:13,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:13,943 INFO L87 Difference]: Start difference. First operand 1462 states and 2136 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:15,954 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:16,163 INFO L93 Difference]: Finished difference Result 2917 states and 4262 transitions. [2021-12-17 03:07:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 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 250 [2021-12-17 03:07:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:16,166 INFO L225 Difference]: With dead ends: 2917 [2021-12-17 03:07:16,166 INFO L226 Difference]: Without dead ends: 1478 [2021-12-17 03:07:16,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:16,168 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 43 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:16,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 529 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:07:16,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-12-17 03:07:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1462. [2021-12-17 03:07:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 1.460643394934976) internal successors, (2134), 1461 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2134 transitions. [2021-12-17 03:07:16,193 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2134 transitions. Word has length 250 [2021-12-17 03:07:16,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:16,193 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 2134 transitions. [2021-12-17 03:07:16,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:16,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2134 transitions. [2021-12-17 03:07:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-17 03:07:16,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:16,195 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:07:16,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-17 03:07:16,195 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:16,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1285427219, now seen corresponding path program 1 times [2021-12-17 03:07:16,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:16,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446270483] [2021-12-17 03:07:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:16,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 373 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-17 03:07:16,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:16,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446270483] [2021-12-17 03:07:16,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446270483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:16,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:16,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:16,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573244172] [2021-12-17 03:07:16,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:16,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:16,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:16,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:16,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:16,291 INFO L87 Difference]: Start difference. First operand 1462 states and 2134 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:18,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:18,624 INFO L93 Difference]: Finished difference Result 3231 states and 4700 transitions. [2021-12-17 03:07:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 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 250 [2021-12-17 03:07:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:18,627 INFO L225 Difference]: With dead ends: 3231 [2021-12-17 03:07:18,627 INFO L226 Difference]: Without dead ends: 1792 [2021-12-17 03:07:18,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:18,629 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 116 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:18,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 313 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:07:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-12-17 03:07:18,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1552. [2021-12-17 03:07:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 1.4480980012894906) internal successors, (2246), 1551 states have internal predecessors, (2246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:18,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2246 transitions. [2021-12-17 03:07:18,661 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2246 transitions. Word has length 250 [2021-12-17 03:07:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:18,662 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 2246 transitions. [2021-12-17 03:07:18,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:18,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2246 transitions. [2021-12-17 03:07:18,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-17 03:07:18,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:18,664 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:07:18,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-17 03:07:18,664 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:18,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2111069235, now seen corresponding path program 1 times [2021-12-17 03:07:18,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:18,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204594412] [2021-12-17 03:07:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:18,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-17 03:07:18,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:18,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204594412] [2021-12-17 03:07:18,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204594412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:18,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:18,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:18,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471863115] [2021-12-17 03:07:18,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:18,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:18,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:18,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:18,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:18,781 INFO L87 Difference]: Start difference. First operand 1552 states and 2246 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:20,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:21,068 INFO L93 Difference]: Finished difference Result 3285 states and 4735 transitions. [2021-12-17 03:07:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-12-17 03:07:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:21,071 INFO L225 Difference]: With dead ends: 3285 [2021-12-17 03:07:21,071 INFO L226 Difference]: Without dead ends: 1756 [2021-12-17 03:07:21,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:21,072 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 115 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:21,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 313 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:07:21,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-12-17 03:07:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1552. [2021-12-17 03:07:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1551 states have (on average 1.435203094777563) internal successors, (2226), 1551 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2226 transitions. [2021-12-17 03:07:21,094 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2226 transitions. Word has length 251 [2021-12-17 03:07:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:21,094 INFO L470 AbstractCegarLoop]: Abstraction has 1552 states and 2226 transitions. [2021-12-17 03:07:21,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2226 transitions. [2021-12-17 03:07:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-17 03:07:21,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:21,100 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-12-17 03:07:21,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-17 03:07:21,100 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:21,101 INFO L85 PathProgramCache]: Analyzing trace with hash 803480974, now seen corresponding path program 1 times [2021-12-17 03:07:21,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:21,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585142333] [2021-12-17 03:07:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:21,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-17 03:07:21,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:21,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585142333] [2021-12-17 03:07:21,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585142333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:21,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:21,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:07:21,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82124785] [2021-12-17 03:07:21,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:21,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:07:21,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:21,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:07:21,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:07:21,214 INFO L87 Difference]: Start difference. First operand 1552 states and 2226 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 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) [2021-12-17 03:07:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:21,258 INFO L93 Difference]: Finished difference Result 3560 states and 5116 transitions. [2021-12-17 03:07:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:07:21,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 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 252 [2021-12-17 03:07:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:21,259 INFO L225 Difference]: With dead ends: 3560 [2021-12-17 03:07:21,259 INFO L226 Difference]: Without dead ends: 2031 [2021-12-17 03:07:21,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:07:21,271 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 128 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:21,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 564 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:07:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-12-17 03:07:21,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 2031. [2021-12-17 03:07:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 1.4344827586206896) internal successors, (2912), 2030 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2912 transitions. [2021-12-17 03:07:21,299 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2912 transitions. Word has length 252 [2021-12-17 03:07:21,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:21,299 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 2912 transitions. [2021-12-17 03:07:21,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 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) [2021-12-17 03:07:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2912 transitions. [2021-12-17 03:07:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-17 03:07:21,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:21,306 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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] [2021-12-17 03:07:21,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-17 03:07:21,306 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:21,306 INFO L85 PathProgramCache]: Analyzing trace with hash -582268469, now seen corresponding path program 1 times [2021-12-17 03:07:21,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:21,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185037569] [2021-12-17 03:07:21,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:21,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 627 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-12-17 03:07:21,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:21,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185037569] [2021-12-17 03:07:21,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185037569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:21,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:21,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:21,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713695911] [2021-12-17 03:07:21,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:21,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:21,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:21,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:21,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:21,482 INFO L87 Difference]: Start difference. First operand 2031 states and 2912 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:23,488 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:23,767 INFO L93 Difference]: Finished difference Result 4373 states and 6257 transitions. [2021-12-17 03:07:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:23,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 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 325 [2021-12-17 03:07:23,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:23,769 INFO L225 Difference]: With dead ends: 4373 [2021-12-17 03:07:23,769 INFO L226 Difference]: Without dead ends: 2365 [2021-12-17 03:07:23,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:23,770 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 58 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:23,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 600 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 252 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:07:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-12-17 03:07:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2198. [2021-12-17 03:07:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2197 states have (on average 1.434228493400091) internal successors, (3151), 2197 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 3151 transitions. [2021-12-17 03:07:23,816 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 3151 transitions. Word has length 325 [2021-12-17 03:07:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:23,816 INFO L470 AbstractCegarLoop]: Abstraction has 2198 states and 3151 transitions. [2021-12-17 03:07:23,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 3151 transitions. [2021-12-17 03:07:23,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-17 03:07:23,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:23,819 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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] [2021-12-17 03:07:23,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-17 03:07:23,819 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:23,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:23,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1517469961, now seen corresponding path program 1 times [2021-12-17 03:07:23,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:23,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116099563] [2021-12-17 03:07:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:23,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 624 proven. 0 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-12-17 03:07:24,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:24,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116099563] [2021-12-17 03:07:24,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116099563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:24,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:24,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:07:24,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754363234] [2021-12-17 03:07:24,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:24,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:07:24,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:24,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:07:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:07:24,082 INFO L87 Difference]: Start difference. First operand 2198 states and 3151 transitions. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:26,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:28,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:28,972 INFO L93 Difference]: Finished difference Result 6177 states and 8890 transitions. [2021-12-17 03:07:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 03:07:28,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 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 325 [2021-12-17 03:07:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:28,976 INFO L225 Difference]: With dead ends: 6177 [2021-12-17 03:07:28,976 INFO L226 Difference]: Without dead ends: 4002 [2021-12-17 03:07:28,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:07:28,977 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 331 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 77 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:28,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 1097 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 804 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2021-12-17 03:07:28,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-12-17 03:07:29,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 3803. [2021-12-17 03:07:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 1.4466070489216203) internal successors, (5500), 3802 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 5500 transitions. [2021-12-17 03:07:29,028 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 5500 transitions. Word has length 325 [2021-12-17 03:07:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:29,028 INFO L470 AbstractCegarLoop]: Abstraction has 3803 states and 5500 transitions. [2021-12-17 03:07:29,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 5500 transitions. [2021-12-17 03:07:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-17 03:07:29,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:29,033 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 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] [2021-12-17 03:07:29,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-17 03:07:29,034 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1066276522, now seen corresponding path program 1 times [2021-12-17 03:07:29,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:29,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737453755] [2021-12-17 03:07:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:29,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:29,182 INFO L134 CoverageAnalysis]: Checked inductivity of 923 backedges. 630 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-12-17 03:07:29,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:29,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737453755] [2021-12-17 03:07:29,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737453755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:29,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:29,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:29,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142958919] [2021-12-17 03:07:29,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:29,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:29,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:29,184 INFO L87 Difference]: Start difference. First operand 3803 states and 5500 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:31,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:31,487 INFO L93 Difference]: Finished difference Result 7865 states and 11340 transitions. [2021-12-17 03:07:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:31,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 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 326 [2021-12-17 03:07:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:31,490 INFO L225 Difference]: With dead ends: 7865 [2021-12-17 03:07:31,490 INFO L226 Difference]: Without dead ends: 4077 [2021-12-17 03:07:31,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:31,493 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 57 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:31,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 598 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:07:31,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4077 states. [2021-12-17 03:07:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4077 to 3799. [2021-12-17 03:07:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 1.444971037388099) internal successors, (5488), 3798 states have internal predecessors, (5488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 5488 transitions. [2021-12-17 03:07:31,567 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 5488 transitions. Word has length 326 [2021-12-17 03:07:31,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:31,567 INFO L470 AbstractCegarLoop]: Abstraction has 3799 states and 5488 transitions. [2021-12-17 03:07:31,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 5488 transitions. [2021-12-17 03:07:31,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-17 03:07:31,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:31,572 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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] [2021-12-17 03:07:31,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-17 03:07:31,572 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:31,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2057166402, now seen corresponding path program 1 times [2021-12-17 03:07:31,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:31,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424617027] [2021-12-17 03:07:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:31,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 622 proven. 71 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-12-17 03:07:32,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:32,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424617027] [2021-12-17 03:07:32,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424617027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:07:32,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808621250] [2021-12-17 03:07:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:32,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:07:32,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:07:32,005 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:07:32,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:07:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:32,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1623 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 03:07:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:07:33,067 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:07:33,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-17 03:07:33,136 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:07:33,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-12-17 03:07:33,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 03:07:33,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-12-17 03:07:33,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-12-17 03:07:33,275 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-12-17 03:07:33,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 32 [2021-12-17 03:07:33,338 INFO L354 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2021-12-17 03:07:33,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 54 [2021-12-17 03:07:33,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-17 03:07:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 624 proven. 48 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-17 03:07:33,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:07:34,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-12-17 03:07:34,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-12-17 03:07:36,112 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_9 Int) (v_arrayElimCell_10 Int)) (not (= 8641 (select (select (store |c_#memory_int| v_arrayElimCell_9 (store (select |c_#memory_int| v_arrayElimCell_9) (+ v_arrayElimCell_10 844) 3)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ |c_ULTIMATE.start_ssl3_accept_~s#1.offset| 52))))) is different from false [2021-12-17 03:07:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 629 proven. 0 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-12-17 03:07:36,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808621250] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 03:07:36,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 03:07:36,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11, 9] total 19 [2021-12-17 03:07:36,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263378810] [2021-12-17 03:07:36,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:36,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 03:07:36,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:36,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 03:07:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=250, Unknown=1, NotChecked=32, Total=342 [2021-12-17 03:07:36,242 INFO L87 Difference]: Start difference. First operand 3799 states and 5488 transitions. Second operand has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:38,248 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:40,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:41,424 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimCell_9 Int) (v_arrayElimCell_10 Int)) (not (= 8641 (select (select (store |c_#memory_int| v_arrayElimCell_9 (store (select |c_#memory_int| v_arrayElimCell_9) (+ v_arrayElimCell_10 844) 3)) |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ |c_ULTIMATE.start_ssl3_accept_~s#1.offset| 52))))) (not (= 8641 (select (select |c_#memory_int| |c_ULTIMATE.start_ssl3_accept_~s#1.base|) (+ |c_ULTIMATE.start_ssl3_accept_~s#1.offset| 52))))) is different from false [2021-12-17 03:07:41,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:41,516 INFO L93 Difference]: Finished difference Result 8075 states and 11628 transitions. [2021-12-17 03:07:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 03:07:41,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 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 326 [2021-12-17 03:07:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:41,521 INFO L225 Difference]: With dead ends: 8075 [2021-12-17 03:07:41,521 INFO L226 Difference]: Without dead ends: 4283 [2021-12-17 03:07:41,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 645 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=66, Invalid=282, Unknown=2, NotChecked=70, Total=420 [2021-12-17 03:07:41,524 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 139 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 61 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:41,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 510 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 325 Invalid, 2 Unknown, 273 Unchecked, 4.3s Time] [2021-12-17 03:07:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2021-12-17 03:07:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 3799. [2021-12-17 03:07:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 1.4454976303317535) internal successors, (5490), 3798 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 5490 transitions. [2021-12-17 03:07:41,586 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 5490 transitions. Word has length 326 [2021-12-17 03:07:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:41,586 INFO L470 AbstractCegarLoop]: Abstraction has 3799 states and 5490 transitions. [2021-12-17 03:07:41,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.5) internal successors, (165), 6 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:41,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 5490 transitions. [2021-12-17 03:07:41,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-12-17 03:07:41,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:41,591 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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] [2021-12-17 03:07:41,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 03:07:41,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-12-17 03:07:41,807 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash -741957713, now seen corresponding path program 1 times [2021-12-17 03:07:41,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:41,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574879422] [2021-12-17 03:07:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:41,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 588 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-12-17 03:07:41,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574879422] [2021-12-17 03:07:41,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574879422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:41,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:41,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:41,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832290541] [2021-12-17 03:07:41,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:41,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:41,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:41,957 INFO L87 Difference]: Start difference. First operand 3799 states and 5490 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:43,962 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:44,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:44,282 INFO L93 Difference]: Finished difference Result 7825 states and 11283 transitions. [2021-12-17 03:07:44,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:44,282 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 341 [2021-12-17 03:07:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:44,286 INFO L225 Difference]: With dead ends: 7825 [2021-12-17 03:07:44,286 INFO L226 Difference]: Without dead ends: 4049 [2021-12-17 03:07:44,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:44,289 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 76 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:44,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 588 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:07:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4049 states. [2021-12-17 03:07:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4049 to 3799. [2021-12-17 03:07:44,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 1.4433912585571353) internal successors, (5482), 3798 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 5482 transitions. [2021-12-17 03:07:44,354 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 5482 transitions. Word has length 341 [2021-12-17 03:07:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:44,354 INFO L470 AbstractCegarLoop]: Abstraction has 3799 states and 5482 transitions. [2021-12-17 03:07:44,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 5482 transitions. [2021-12-17 03:07:44,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-17 03:07:44,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:44,360 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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] [2021-12-17 03:07:44,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-17 03:07:44,360 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:44,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1344067760, now seen corresponding path program 1 times [2021-12-17 03:07:44,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:44,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110641421] [2021-12-17 03:07:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:44,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1007 backedges. 615 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-12-17 03:07:44,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:44,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110641421] [2021-12-17 03:07:44,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110641421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:44,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:44,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:44,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154819402] [2021-12-17 03:07:44,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:44,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:44,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:44,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:44,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:44,516 INFO L87 Difference]: Start difference. First operand 3799 states and 5482 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:46,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:46,805 INFO L93 Difference]: Finished difference Result 7785 states and 11215 transitions. [2021-12-17 03:07:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 344 [2021-12-17 03:07:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:46,810 INFO L225 Difference]: With dead ends: 7785 [2021-12-17 03:07:46,810 INFO L226 Difference]: Without dead ends: 4009 [2021-12-17 03:07:46,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:46,813 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 65 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:46,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 574 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:07:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4009 states. [2021-12-17 03:07:46,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4009 to 3799. [2021-12-17 03:07:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 1.4412848867825172) internal successors, (5474), 3798 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 5474 transitions. [2021-12-17 03:07:46,873 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 5474 transitions. Word has length 344 [2021-12-17 03:07:46,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:46,873 INFO L470 AbstractCegarLoop]: Abstraction has 3799 states and 5474 transitions. [2021-12-17 03:07:46,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:46,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 5474 transitions. [2021-12-17 03:07:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2021-12-17 03:07:46,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:46,877 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-12-17 03:07:46,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-17 03:07:46,878 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1427756017, now seen corresponding path program 1 times [2021-12-17 03:07:46,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:46,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770811204] [2021-12-17 03:07:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:46,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 687 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-12-17 03:07:47,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:47,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770811204] [2021-12-17 03:07:47,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770811204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:47,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:47,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:47,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310046174] [2021-12-17 03:07:47,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:47,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:47,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:47,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:47,043 INFO L87 Difference]: Start difference. First operand 3799 states and 5474 transitions. Second operand has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:49,055 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:49,323 INFO L93 Difference]: Finished difference Result 7721 states and 11095 transitions. [2021-12-17 03:07:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 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 344 [2021-12-17 03:07:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:49,326 INFO L225 Difference]: With dead ends: 7721 [2021-12-17 03:07:49,326 INFO L226 Difference]: Without dead ends: 3945 [2021-12-17 03:07:49,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:49,329 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 42 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:49,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 564 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 196 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:07:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2021-12-17 03:07:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 3799. [2021-12-17 03:07:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 1.4391785150078988) internal successors, (5466), 3798 states have internal predecessors, (5466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 5466 transitions. [2021-12-17 03:07:49,386 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 5466 transitions. Word has length 344 [2021-12-17 03:07:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:49,386 INFO L470 AbstractCegarLoop]: Abstraction has 3799 states and 5466 transitions. [2021-12-17 03:07:49,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 5466 transitions. [2021-12-17 03:07:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-17 03:07:49,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:49,390 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:07:49,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-17 03:07:49,390 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:49,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:49,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1676437080, now seen corresponding path program 1 times [2021-12-17 03:07:49,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:49,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416563789] [2021-12-17 03:07:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:49,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 680 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-12-17 03:07:49,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:49,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416563789] [2021-12-17 03:07:49,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416563789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:49,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:49,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:49,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12776919] [2021-12-17 03:07:49,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:49,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:49,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:49,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:49,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:49,504 INFO L87 Difference]: Start difference. First operand 3799 states and 5466 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:51,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:51,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:51,757 INFO L93 Difference]: Finished difference Result 7689 states and 11037 transitions. [2021-12-17 03:07:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:51,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 347 [2021-12-17 03:07:51,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:51,761 INFO L225 Difference]: With dead ends: 7689 [2021-12-17 03:07:51,761 INFO L226 Difference]: Without dead ends: 3913 [2021-12-17 03:07:51,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:51,763 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 43 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:51,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 556 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 188 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:07:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2021-12-17 03:07:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3799. [2021-12-17 03:07:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 1.4370721432332807) internal successors, (5458), 3798 states have internal predecessors, (5458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 5458 transitions. [2021-12-17 03:07:51,819 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 5458 transitions. Word has length 347 [2021-12-17 03:07:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:51,819 INFO L470 AbstractCegarLoop]: Abstraction has 3799 states and 5458 transitions. [2021-12-17 03:07:51,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 5458 transitions. [2021-12-17 03:07:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-17 03:07:51,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:51,823 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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] [2021-12-17 03:07:51,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-17 03:07:51,823 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash -313111172, now seen corresponding path program 1 times [2021-12-17 03:07:51,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:51,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985724787] [2021-12-17 03:07:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:51,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 714 proven. 83 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-12-17 03:07:51,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985724787] [2021-12-17 03:07:51,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985724787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:07:51,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815472836] [2021-12-17 03:07:51,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:51,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:07:51,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:07:51,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:07:51,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 03:07:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:52,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1711 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-17 03:07:52,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:07:52,974 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:07:52,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-17 03:07:53,014 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:07:53,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-12-17 03:07:53,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-12-17 03:07:53,254 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:07:53,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-17 03:07:53,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-17 03:07:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 686 proven. 126 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-17 03:07:53,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:07:53,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-17 03:07:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 707 proven. 0 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-12-17 03:07:53,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815472836] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 03:07:53,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-17 03:07:53,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 8] total 12 [2021-12-17 03:07:53,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737409454] [2021-12-17 03:07:53,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:53,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:53,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:53,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:53,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:07:53,871 INFO L87 Difference]: Start difference. First operand 3799 states and 5458 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:55,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:56,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:56,202 INFO L93 Difference]: Finished difference Result 8365 states and 11977 transitions. [2021-12-17 03:07:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:56,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 348 [2021-12-17 03:07:56,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:56,206 INFO L225 Difference]: With dead ends: 8365 [2021-12-17 03:07:56,206 INFO L226 Difference]: Without dead ends: 4589 [2021-12-17 03:07:56,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 691 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:07:56,208 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 105 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:56,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 411 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:07:56,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-12-17 03:07:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 4115. [2021-12-17 03:07:56,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4115 states, 4114 states have (on average 1.4358288770053476) internal successors, (5907), 4114 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4115 states to 4115 states and 5907 transitions. [2021-12-17 03:07:56,267 INFO L78 Accepts]: Start accepts. Automaton has 4115 states and 5907 transitions. Word has length 348 [2021-12-17 03:07:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:56,267 INFO L470 AbstractCegarLoop]: Abstraction has 4115 states and 5907 transitions. [2021-12-17 03:07:56,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4115 states and 5907 transitions. [2021-12-17 03:07:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-12-17 03:07:56,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:56,272 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 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] [2021-12-17 03:07:56,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 03:07:56,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-17 03:07:56,475 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:56,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:56,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1312334907, now seen corresponding path program 1 times [2021-12-17 03:07:56,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:56,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672867974] [2021-12-17 03:07:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:56,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 419 trivial. 0 not checked. [2021-12-17 03:07:56,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:56,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672867974] [2021-12-17 03:07:56,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672867974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:56,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:56,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:07:56,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457005238] [2021-12-17 03:07:56,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:56,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:07:56,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:07:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:07:56,626 INFO L87 Difference]: Start difference. First operand 4115 states and 5907 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:58,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:07:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:07:58,895 INFO L93 Difference]: Finished difference Result 8361 states and 11981 transitions. [2021-12-17 03:07:58,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:07:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 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 349 [2021-12-17 03:07:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:07:58,900 INFO L225 Difference]: With dead ends: 8361 [2021-12-17 03:07:58,900 INFO L226 Difference]: Without dead ends: 4269 [2021-12-17 03:07:58,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:58,903 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 35 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:07:58,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 559 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:07:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2021-12-17 03:07:58,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 4115. [2021-12-17 03:07:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4115 states, 4114 states have (on average 1.4338842975206612) internal successors, (5899), 4114 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4115 states to 4115 states and 5899 transitions. [2021-12-17 03:07:58,966 INFO L78 Accepts]: Start accepts. Automaton has 4115 states and 5899 transitions. Word has length 349 [2021-12-17 03:07:58,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:07:58,966 INFO L470 AbstractCegarLoop]: Abstraction has 4115 states and 5899 transitions. [2021-12-17 03:07:58,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:07:58,966 INFO L276 IsEmpty]: Start isEmpty. Operand 4115 states and 5899 transitions. [2021-12-17 03:07:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-17 03:07:58,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:07:58,970 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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] [2021-12-17 03:07:58,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-17 03:07:58,971 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:07:58,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:07:58,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1310451481, now seen corresponding path program 1 times [2021-12-17 03:07:58,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:07:58,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902852959] [2021-12-17 03:07:58,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:07:58,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:07:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:07:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2021-12-17 03:07:59,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:07:59,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902852959] [2021-12-17 03:07:59,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902852959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:07:59,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:07:59,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:07:59,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026432354] [2021-12-17 03:07:59,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:07:59,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:07:59,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:07:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:07:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:07:59,350 INFO L87 Difference]: Start difference. First operand 4115 states and 5899 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:08:01,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:08:03,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:08:03,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:08:03,660 INFO L93 Difference]: Finished difference Result 8227 states and 11794 transitions. [2021-12-17 03:08:03,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 03:08:03,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 355 [2021-12-17 03:08:03,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:08:03,665 INFO L225 Difference]: With dead ends: 8227 [2021-12-17 03:08:03,665 INFO L226 Difference]: Without dead ends: 4115 [2021-12-17 03:08:03,669 INFO L932 BasicCegarLoop]: 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 [2021-12-17 03:08:03,669 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 7 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:08:03,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 643 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-12-17 03:08:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2021-12-17 03:08:03,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 4115. [2021-12-17 03:08:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4115 states, 4114 states have (on average 1.4336412250850754) internal successors, (5898), 4114 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:08:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4115 states to 4115 states and 5898 transitions. [2021-12-17 03:08:03,734 INFO L78 Accepts]: Start accepts. Automaton has 4115 states and 5898 transitions. Word has length 355 [2021-12-17 03:08:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:08:03,735 INFO L470 AbstractCegarLoop]: Abstraction has 4115 states and 5898 transitions. [2021-12-17 03:08:03,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:08:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4115 states and 5898 transitions. [2021-12-17 03:08:03,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-17 03:08:03,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:08:03,740 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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] [2021-12-17 03:08:03,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-17 03:08:03,740 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:08:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:08:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1162756329, now seen corresponding path program 1 times [2021-12-17 03:08:03,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:08:03,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326426797] [2021-12-17 03:08:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:08:03,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:08:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:08:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 229 proven. 900 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:08:05,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:08:05,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326426797] [2021-12-17 03:08:05,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326426797] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:08:05,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926709763] [2021-12-17 03:08:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:08:05,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:08:05,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:08:05,302 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:08:05,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 03:08:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:08:06,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-17 03:08:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:08:06,526 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-17 03:08:06,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-12-17 03:08:06,579 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-17 03:08:06,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-12-17 03:08:06,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 03:08:06,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 03:08:06,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-17 03:08:06,755 INFO L354 Elim1Store]: treesize reduction 31, result has 44.6 percent of original size [2021-12-17 03:08:06,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 82 [2021-12-17 03:08:06,774 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-17 03:08:06,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 64 [2021-12-17 03:08:06,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:06,812 INFO L354 Elim1Store]: treesize reduction 48, result has 44.8 percent of original size [2021-12-17 03:08:06,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 54 [2021-12-17 03:08:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:06,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 114 [2021-12-17 03:08:06,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:06,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 114 [2021-12-17 03:08:06,963 INFO L354 Elim1Store]: treesize reduction 246, result has 22.4 percent of original size [2021-12-17 03:08:06,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 145 [2021-12-17 03:08:08,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:08,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 155 [2021-12-17 03:08:08,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:08,253 INFO L354 Elim1Store]: treesize reduction 156, result has 23.5 percent of original size [2021-12-17 03:08:08,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 176 treesize of output 174 [2021-12-17 03:08:08,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:08,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 159 [2021-12-17 03:08:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2021-12-17 03:08:09,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2021-12-17 03:08:09,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,813 INFO L354 Elim1Store]: treesize reduction 183, result has 10.3 percent of original size [2021-12-17 03:08:09,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 73 [2021-12-17 03:08:09,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-17 03:08:09,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,897 INFO L354 Elim1Store]: treesize reduction 131, result has 25.6 percent of original size [2021-12-17 03:08:09,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 84 [2021-12-17 03:08:09,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:09,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 68 [2021-12-17 03:08:10,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:10,706 INFO L354 Elim1Store]: treesize reduction 60, result has 45.9 percent of original size [2021-12-17 03:08:10,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 161 treesize of output 156 [2021-12-17 03:08:10,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:10,744 INFO L354 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2021-12-17 03:08:10,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 138 treesize of output 133 [2021-12-17 03:08:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:10,826 INFO L354 Elim1Store]: treesize reduction 70, result has 53.3 percent of original size [2021-12-17 03:08:10,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 96 [2021-12-17 03:08:24,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 197 [2021-12-17 03:08:24,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 197 [2021-12-17 03:08:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:08:24,413 INFO L354 Elim1Store]: treesize reduction 111, result has 7.5 percent of original size [2021-12-17 03:08:24,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 221 treesize of output 218 [2021-12-17 03:11:30,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:30,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:30,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:30,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 188 [2021-12-17 03:11:30,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:30,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:30,289 INFO L354 Elim1Store]: treesize reduction 67, result has 11.8 percent of original size [2021-12-17 03:11:30,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 209 [2021-12-17 03:11:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:30,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:30,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 188 [2021-12-17 03:11:34,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,286 INFO L354 Elim1Store]: treesize reduction 76, result has 31.5 percent of original size [2021-12-17 03:11:34,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 250 treesize of output 199 [2021-12-17 03:11:34,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,314 INFO L354 Elim1Store]: treesize reduction 172, result has 9.9 percent of original size [2021-12-17 03:11:34,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 78 [2021-12-17 03:11:34,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,340 INFO L354 Elim1Store]: treesize reduction 68, result has 34.0 percent of original size [2021-12-17 03:11:34,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 218 treesize of output 185 [2021-12-17 03:11:34,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 157 [2021-12-17 03:11:34,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,549 INFO L354 Elim1Store]: treesize reduction 127, result has 14.2 percent of original size [2021-12-17 03:11:34,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 59 [2021-12-17 03:11:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:34,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 157 [2021-12-17 03:11:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:36,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 145 [2021-12-17 03:11:36,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:36,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 91 [2021-12-17 03:11:36,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:36,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:36,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:36,442 INFO L354 Elim1Store]: treesize reduction 67, result has 11.8 percent of original size [2021-12-17 03:11:36,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 50 [2021-12-17 03:11:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:55,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:55,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:11:55,710 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-12-17 03:11:55,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 17 [2021-12-17 03:11:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 520 proven. 562 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-17 03:11:55,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 03:14:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 578 proven. 398 refuted. 61 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-17 03:14:15,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926709763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 03:14:15,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 03:14:15,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 17] total 54 [2021-12-17 03:14:15,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562891700] [2021-12-17 03:14:15,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 03:14:15,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 03:14:15,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 03:14:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2461, Unknown=40, NotChecked=0, Total=2862 [2021-12-17 03:14:15,522 INFO L87 Difference]: Start difference. First operand 4115 states and 5898 transitions. Second operand has 54 states, 54 states have (on average 15.703703703703704) internal successors, (848), 54 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:17,537 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:14:19,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:15:28,185 WARN L227 SmtUtils]: Spent 8.59s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 03:15:37,338 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 03:16:19,174 WARN L227 SmtUtils]: Spent 15.68s on a formula simplification. DAG size of input: 227 DAG size of output: 224 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 03:16:47,556 WARN L227 SmtUtils]: Spent 12.87s on a formula simplification. DAG size of input: 222 DAG size of output: 220 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 03:17:06,569 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 03:18:35,418 WARN L227 SmtUtils]: Spent 18.17s on a formula simplification. DAG size of input: 222 DAG size of output: 199 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-17 03:18:44,448 WARN L227 SmtUtils]: Spent 7.66s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Killed by 15