./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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.06.i.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:59:18,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:59:18,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:59:18,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:59:18,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:59:18,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:59:18,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:59:18,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:59:18,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:59:18,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:59:18,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:59:18,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:59:18,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:59:18,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:59:18,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:59:18,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:59:18,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:59:18,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:59:18,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:59:18,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:59:18,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:59:18,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:59:18,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:59:18,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:59:18,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:59:18,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:59:18,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:59:18,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:59:18,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:59:18,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:59:18,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:59:18,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:59:18,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:59:18,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:59:18,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:59:18,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:59:18,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:59:18,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:59:18,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:59:18,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:59:18,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:59:18,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:59:18,404 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:59:18,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:59:18,405 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:59:18,405 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:59:18,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:59:18,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:59:18,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:59:18,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:59:18,407 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:59:18,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:59:18,407 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:59:18,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:59:18,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:59:18,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:59:18,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:59:18,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:59:18,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:59:18,409 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:59:18,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:59:18,409 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:59:18,409 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:59:18,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:59:18,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:59:18,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:59:18,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:59:18,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:59:18,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:59:18,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:59:18,411 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:59:18,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:59:18,412 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:59:18,412 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:59:18,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:59:18,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:59:18,412 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61a0aa66b71092ec74a73b9f534556f5bbb6f25851e8b5ad307fc7dd7f051667 [2021-12-15 08:59:18,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:59:18,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:59:18,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:59:18,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:59:18,658 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:59:18,659 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-12-15 08:59:18,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f0f78df/2f56b1f540be468e8c42a28ef2558ee3/FLAG9b67cb9ad [2021-12-15 08:59:19,215 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:59:19,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-2.c [2021-12-15 08:59:19,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f0f78df/2f56b1f540be468e8c42a28ef2558ee3/FLAG9b67cb9ad [2021-12-15 08:59:19,731 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08f0f78df/2f56b1f540be468e8c42a28ef2558ee3 [2021-12-15 08:59:19,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:59:19,734 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:59:19,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:59:19,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:59:19,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:59:19,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:59:19" (1/1) ... [2021-12-15 08:59:19,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f82d8e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:19, skipping insertion in model container [2021-12-15 08:59:19,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:59:19" (1/1) ... [2021-12-15 08:59:19,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:59:19,792 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:59:20,034 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.06.i.cil-2.c[78808,78821] [2021-12-15 08:59:20,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:59:20,050 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:59:20,117 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.06.i.cil-2.c[78808,78821] [2021-12-15 08:59:20,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:59:20,131 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:59:20,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20 WrapperNode [2021-12-15 08:59:20,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:59:20,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:59:20,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:59:20,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:59:20,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20" (1/1) ... [2021-12-15 08:59:20,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20" (1/1) ... [2021-12-15 08:59:20,214 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 816 [2021-12-15 08:59:20,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:59:20,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:59:20,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:59:20,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:59:20,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20" (1/1) ... [2021-12-15 08:59:20,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20" (1/1) ... [2021-12-15 08:59:20,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20" (1/1) ... [2021-12-15 08:59:20,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20" (1/1) ... [2021-12-15 08:59:20,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20" (1/1) ... [2021-12-15 08:59:20,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20" (1/1) ... [2021-12-15 08:59:20,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20" (1/1) ... [2021-12-15 08:59:20,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:59:20,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:59:20,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:59:20,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:59:20,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20" (1/1) ... [2021-12-15 08:59:20,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:59:20,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:59:20,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:59:20,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:59:20,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:59:20,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 08:59:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:59:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:59:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 08:59:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:59:20,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:59:20,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:59:20,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:59:20,453 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:59:20,456 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:59:20,474 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 08:59:22,558 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-15 08:59:22,559 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-15 08:59:22,559 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:59:22,567 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:59:22,568 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 08:59:22,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:59:22 BoogieIcfgContainer [2021-12-15 08:59:22,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:59:22,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:59:22,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:59:22,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:59:22,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:59:19" (1/3) ... [2021-12-15 08:59:22,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728e83e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:59:22, skipping insertion in model container [2021-12-15 08:59:22,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:59:20" (2/3) ... [2021-12-15 08:59:22,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@728e83e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:59:22, skipping insertion in model container [2021-12-15 08:59:22,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:59:22" (3/3) ... [2021-12-15 08:59:22,577 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.06.i.cil-2.c [2021-12-15 08:59:22,580 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:59:22,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:59:22,623 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:59:22,629 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:59:22,629 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:59:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 08:59:22,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:22,656 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] [2021-12-15 08:59:22,656 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:22,659 INFO L85 PathProgramCache]: Analyzing trace with hash 271453869, now seen corresponding path program 1 times [2021-12-15 08:59:22,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:22,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326373748] [2021-12-15 08:59:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:22,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:23,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:23,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326373748] [2021-12-15 08:59:23,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326373748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:23,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:23,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:23,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246847923] [2021-12-15 08:59:23,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:23,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:23,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:23,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:23,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:23,092 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.7375) internal successors, (278), 161 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:23,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:23,708 INFO L93 Difference]: Finished difference Result 349 states and 598 transitions. [2021-12-15 08:59:23,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:23,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 08:59:23,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:23,716 INFO L225 Difference]: With dead ends: 349 [2021-12-15 08:59:23,717 INFO L226 Difference]: Without dead ends: 177 [2021-12-15 08:59:23,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:23,721 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 36 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:23,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 657 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 08:59:23,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-15 08:59:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 160. [2021-12-15 08:59:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.5911949685534592) internal successors, (253), 159 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 253 transitions. [2021-12-15 08:59:23,764 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 253 transitions. Word has length 47 [2021-12-15 08:59:23,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:23,764 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 253 transitions. [2021-12-15 08:59:23,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:23,764 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 253 transitions. [2021-12-15 08:59:23,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-15 08:59:23,766 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:23,766 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] [2021-12-15 08:59:23,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:59:23,767 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:23,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1171867431, now seen corresponding path program 1 times [2021-12-15 08:59:23,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:23,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636914776] [2021-12-15 08:59:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:23,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:23,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:23,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636914776] [2021-12-15 08:59:23,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636914776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:23,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:23,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:23,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147172143] [2021-12-15 08:59:23,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:23,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:23,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:23,859 INFO L87 Difference]: Start difference. First operand 160 states and 253 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:24,588 INFO L93 Difference]: Finished difference Result 316 states and 494 transitions. [2021-12-15 08:59:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:24,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-15 08:59:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:24,590 INFO L225 Difference]: With dead ends: 316 [2021-12-15 08:59:24,590 INFO L226 Difference]: Without dead ends: 177 [2021-12-15 08:59:24,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:24,591 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 24 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:24,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 543 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 08:59:24,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-15 08:59:24,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 160. [2021-12-15 08:59:24,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.5849056603773586) internal successors, (252), 159 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 252 transitions. [2021-12-15 08:59:24,598 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 252 transitions. Word has length 60 [2021-12-15 08:59:24,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:24,599 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 252 transitions. [2021-12-15 08:59:24,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 252 transitions. [2021-12-15 08:59:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 08:59:24,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:24,600 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] [2021-12-15 08:59:24,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:59:24,601 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:24,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:24,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1586342230, now seen corresponding path program 1 times [2021-12-15 08:59:24,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:24,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608942903] [2021-12-15 08:59:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:24,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:24,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:24,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608942903] [2021-12-15 08:59:24,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608942903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:24,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:24,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:24,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103446162] [2021-12-15 08:59:24,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:24,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:24,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:24,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:24,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:24,700 INFO L87 Difference]: Start difference. First operand 160 states and 252 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:25,372 INFO L93 Difference]: Finished difference Result 426 states and 675 transitions. [2021-12-15 08:59:25,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:25,372 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 [2021-12-15 08:59:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:25,374 INFO L225 Difference]: With dead ends: 426 [2021-12-15 08:59:25,374 INFO L226 Difference]: Without dead ends: 287 [2021-12-15 08:59:25,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:25,375 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 170 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:25,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 404 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 08:59:25,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-15 08:59:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 171. [2021-12-15 08:59:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.5705882352941176) internal successors, (267), 170 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:25,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 267 transitions. [2021-12-15 08:59:25,382 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 267 transitions. Word has length 61 [2021-12-15 08:59:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:25,382 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 267 transitions. [2021-12-15 08:59:25,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 267 transitions. [2021-12-15 08:59:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 08:59:25,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:25,384 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] [2021-12-15 08:59:25,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:59:25,384 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:25,385 INFO L85 PathProgramCache]: Analyzing trace with hash -748331458, now seen corresponding path program 1 times [2021-12-15 08:59:25,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:25,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366630931] [2021-12-15 08:59:25,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:25,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:25,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:25,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366630931] [2021-12-15 08:59:25,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366630931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:25,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:25,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:25,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206140072] [2021-12-15 08:59:25,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:25,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:25,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:25,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:25,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:25,459 INFO L87 Difference]: Start difference. First operand 171 states and 267 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:26,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:26,031 INFO L93 Difference]: Finished difference Result 437 states and 689 transitions. [2021-12-15 08:59:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:26,031 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 [2021-12-15 08:59:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:26,032 INFO L225 Difference]: With dead ends: 437 [2021-12-15 08:59:26,032 INFO L226 Difference]: Without dead ends: 287 [2021-12-15 08:59:26,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:26,034 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 168 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:26,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 404 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 08:59:26,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-15 08:59:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 172. [2021-12-15 08:59:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.5614035087719298) internal successors, (267), 171 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 267 transitions. [2021-12-15 08:59:26,040 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 267 transitions. Word has length 61 [2021-12-15 08:59:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:26,040 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 267 transitions. [2021-12-15 08:59:26,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:26,041 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 267 transitions. [2021-12-15 08:59:26,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 08:59:26,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:26,042 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] [2021-12-15 08:59:26,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 08:59:26,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:26,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:26,043 INFO L85 PathProgramCache]: Analyzing trace with hash 706199381, now seen corresponding path program 1 times [2021-12-15 08:59:26,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:26,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626788616] [2021-12-15 08:59:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:26,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:26,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:26,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626788616] [2021-12-15 08:59:26,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626788616] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:26,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:26,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:26,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593209319] [2021-12-15 08:59:26,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:26,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:26,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:26,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:26,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:26,136 INFO L87 Difference]: Start difference. First operand 172 states and 267 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:27,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:28,215 INFO L93 Difference]: Finished difference Result 437 states and 687 transitions. [2021-12-15 08:59:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:28,215 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 [2021-12-15 08:59:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:28,217 INFO L225 Difference]: With dead ends: 437 [2021-12-15 08:59:28,217 INFO L226 Difference]: Without dead ends: 286 [2021-12-15 08:59:28,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:28,218 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 161 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:28,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 406 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 08:59:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-12-15 08:59:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 178. [2021-12-15 08:59:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5649717514124293) internal successors, (277), 177 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 277 transitions. [2021-12-15 08:59:28,222 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 277 transitions. Word has length 61 [2021-12-15 08:59:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:28,223 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 277 transitions. [2021-12-15 08:59:28,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 277 transitions. [2021-12-15 08:59:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 08:59:28,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:28,224 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] [2021-12-15 08:59:28,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 08:59:28,224 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash -243148779, now seen corresponding path program 1 times [2021-12-15 08:59:28,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:28,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620792758] [2021-12-15 08:59:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:28,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:28,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:28,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620792758] [2021-12-15 08:59:28,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620792758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:28,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:28,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:28,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261231858] [2021-12-15 08:59:28,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:28,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:28,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:28,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:28,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:28,332 INFO L87 Difference]: Start difference. First operand 178 states and 277 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:30,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:30,252 INFO L93 Difference]: Finished difference Result 348 states and 542 transitions. [2021-12-15 08:59:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:30,252 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 [2021-12-15 08:59:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:30,253 INFO L225 Difference]: With dead ends: 348 [2021-12-15 08:59:30,253 INFO L226 Difference]: Without dead ends: 191 [2021-12-15 08:59:30,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:30,254 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 19 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:30,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 551 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 08:59:30,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-15 08:59:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2021-12-15 08:59:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5593220338983051) internal successors, (276), 177 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 276 transitions. [2021-12-15 08:59:30,259 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 276 transitions. Word has length 61 [2021-12-15 08:59:30,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:30,259 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 276 transitions. [2021-12-15 08:59:30,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 276 transitions. [2021-12-15 08:59:30,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-15 08:59:30,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:30,260 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] [2021-12-15 08:59:30,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 08:59:30,261 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:30,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1989979458, now seen corresponding path program 1 times [2021-12-15 08:59:30,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:30,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13804680] [2021-12-15 08:59:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:30,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:30,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:30,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13804680] [2021-12-15 08:59:30,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13804680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:30,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:30,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:30,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562894894] [2021-12-15 08:59:30,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:30,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:30,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:30,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:30,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:30,346 INFO L87 Difference]: Start difference. First operand 178 states and 276 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) [2021-12-15 08:59:32,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:32,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:32,638 INFO L93 Difference]: Finished difference Result 443 states and 695 transitions. [2021-12-15 08:59:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:32,639 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 [2021-12-15 08:59:32,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:32,640 INFO L225 Difference]: With dead ends: 443 [2021-12-15 08:59:32,640 INFO L226 Difference]: Without dead ends: 286 [2021-12-15 08:59:32,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:32,641 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 165 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 406 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 [2021-12-15 08:59:32,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 406 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:32,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-12-15 08:59:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 178. [2021-12-15 08:59:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5480225988700564) internal successors, (274), 177 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 274 transitions. [2021-12-15 08:59:32,645 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 274 transitions. Word has length 62 [2021-12-15 08:59:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:32,645 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 274 transitions. [2021-12-15 08:59:32,645 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) [2021-12-15 08:59:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 274 transitions. [2021-12-15 08:59:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-15 08:59:32,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:32,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:32,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 08:59:32,646 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash 939475139, now seen corresponding path program 1 times [2021-12-15 08:59:32,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:32,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370578266] [2021-12-15 08:59:32,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:32,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:32,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:32,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370578266] [2021-12-15 08:59:32,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370578266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:32,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:32,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:32,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761353458] [2021-12-15 08:59:32,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:32,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:32,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:32,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:32,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:32,729 INFO L87 Difference]: Start difference. First operand 178 states and 274 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) [2021-12-15 08:59:34,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:34,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:34,899 INFO L93 Difference]: Finished difference Result 348 states and 538 transitions. [2021-12-15 08:59:34,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:34,903 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 [2021-12-15 08:59:34,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:34,904 INFO L225 Difference]: With dead ends: 348 [2021-12-15 08:59:34,904 INFO L226 Difference]: Without dead ends: 191 [2021-12-15 08:59:34,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:34,905 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 20 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 551 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 [2021-12-15 08:59:34,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 551 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:34,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-15 08:59:34,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 178. [2021-12-15 08:59:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5423728813559323) internal successors, (273), 177 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 273 transitions. [2021-12-15 08:59:34,908 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 273 transitions. Word has length 63 [2021-12-15 08:59:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:34,908 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 273 transitions. [2021-12-15 08:59:34,908 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) [2021-12-15 08:59:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 273 transitions. [2021-12-15 08:59:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 08:59:34,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:34,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:34,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 08:59:34,909 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:34,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:34,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1600184473, now seen corresponding path program 1 times [2021-12-15 08:59:34,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:34,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111537410] [2021-12-15 08:59:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:34,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:35,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:35,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111537410] [2021-12-15 08:59:35,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111537410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:35,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:35,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:35,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714066980] [2021-12-15 08:59:35,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:35,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:35,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:35,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:35,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:35,004 INFO L87 Difference]: Start difference. First operand 178 states and 273 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) [2021-12-15 08:59:37,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:37,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:37,291 INFO L93 Difference]: Finished difference Result 443 states and 691 transitions. [2021-12-15 08:59:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:37,292 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 [2021-12-15 08:59:37,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:37,293 INFO L225 Difference]: With dead ends: 443 [2021-12-15 08:59:37,293 INFO L226 Difference]: Without dead ends: 286 [2021-12-15 08:59:37,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:37,294 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 162 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 406 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 [2021-12-15 08:59:37,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 406 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 08:59:37,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-12-15 08:59:37,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 178. [2021-12-15 08:59:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5310734463276836) internal successors, (271), 177 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:37,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 271 transitions. [2021-12-15 08:59:37,320 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 271 transitions. Word has length 64 [2021-12-15 08:59:37,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:37,320 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 271 transitions. [2021-12-15 08:59:37,321 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) [2021-12-15 08:59:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 271 transitions. [2021-12-15 08:59:37,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 08:59:37,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:37,321 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] [2021-12-15 08:59:37,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 08:59:37,322 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:37,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:37,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1200033073, now seen corresponding path program 1 times [2021-12-15 08:59:37,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:37,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395045065] [2021-12-15 08:59:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:37,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:37,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:37,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395045065] [2021-12-15 08:59:37,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395045065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:37,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:37,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:37,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377909551] [2021-12-15 08:59:37,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:37,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:37,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:37,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:37,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:37,394 INFO L87 Difference]: Start difference. First operand 178 states and 271 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) [2021-12-15 08:59:39,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:39,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:39,539 INFO L93 Difference]: Finished difference Result 462 states and 715 transitions. [2021-12-15 08:59:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:39,540 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 [2021-12-15 08:59:39,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:39,541 INFO L225 Difference]: With dead ends: 462 [2021-12-15 08:59:39,541 INFO L226 Difference]: Without dead ends: 305 [2021-12-15 08:59:39,541 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 [2021-12-15 08:59:39,542 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 138 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:39,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 406 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 08:59:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-15 08:59:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 218. [2021-12-15 08:59:39,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5622119815668203) internal successors, (339), 217 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 339 transitions. [2021-12-15 08:59:39,546 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 339 transitions. Word has length 64 [2021-12-15 08:59:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:39,547 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 339 transitions. [2021-12-15 08:59:39,547 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) [2021-12-15 08:59:39,547 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 339 transitions. [2021-12-15 08:59:39,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 08:59:39,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:39,550 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] [2021-12-15 08:59:39,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 08:59:39,551 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:39,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:39,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1556245834, now seen corresponding path program 1 times [2021-12-15 08:59:39,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:39,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729056324] [2021-12-15 08:59:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:39,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:39,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:39,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729056324] [2021-12-15 08:59:39,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729056324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:39,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:39,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:39,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687332301] [2021-12-15 08:59:39,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:39,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:39,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:39,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:39,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:39,640 INFO L87 Difference]: Start difference. First operand 218 states and 339 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) [2021-12-15 08:59:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:40,156 INFO L93 Difference]: Finished difference Result 523 states and 824 transitions. [2021-12-15 08:59:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:40,156 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 [2021-12-15 08:59:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:40,158 INFO L225 Difference]: With dead ends: 523 [2021-12-15 08:59:40,158 INFO L226 Difference]: Without dead ends: 326 [2021-12-15 08:59:40,158 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 [2021-12-15 08:59:40,159 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 137 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:40,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 438 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 08:59:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-15 08:59:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 240. [2021-12-15 08:59:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.598326359832636) internal successors, (382), 239 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 382 transitions. [2021-12-15 08:59:40,164 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 382 transitions. Word has length 65 [2021-12-15 08:59:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:40,164 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 382 transitions. [2021-12-15 08:59:40,165 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) [2021-12-15 08:59:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 382 transitions. [2021-12-15 08:59:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 08:59:40,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:40,166 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] [2021-12-15 08:59:40,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 08:59:40,166 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:40,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1107095634, now seen corresponding path program 1 times [2021-12-15 08:59:40,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:40,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994026786] [2021-12-15 08:59:40,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:40,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:59:40,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:40,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994026786] [2021-12-15 08:59:40,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994026786] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:40,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:40,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:40,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108198209] [2021-12-15 08:59:40,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:40,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:40,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:40,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:40,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:40,253 INFO L87 Difference]: Start difference. First operand 240 states and 382 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:40,906 INFO L93 Difference]: Finished difference Result 621 states and 998 transitions. [2021-12-15 08:59:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:40,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-15 08:59:40,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:40,908 INFO L225 Difference]: With dead ends: 621 [2021-12-15 08:59:40,908 INFO L226 Difference]: Without dead ends: 402 [2021-12-15 08:59:40,909 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 [2021-12-15 08:59:40,909 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 143 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:40,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 418 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 08:59:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-15 08:59:40,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 304. [2021-12-15 08:59:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.6105610561056105) internal successors, (488), 303 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) [2021-12-15 08:59:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 488 transitions. [2021-12-15 08:59:40,916 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 488 transitions. Word has length 93 [2021-12-15 08:59:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:40,916 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 488 transitions. [2021-12-15 08:59:40,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 488 transitions. [2021-12-15 08:59:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-15 08:59:40,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:40,917 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:40,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 08:59:40,918 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:40,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1490991899, now seen corresponding path program 1 times [2021-12-15 08:59:40,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:40,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298212421] [2021-12-15 08:59:40,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:40,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-15 08:59:40,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:40,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298212421] [2021-12-15 08:59:40,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298212421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:40,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:40,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:40,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628489160] [2021-12-15 08:59:40,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:40,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:40,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:40,988 INFO L87 Difference]: Start difference. First operand 304 states and 488 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) [2021-12-15 08:59:41,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:41,546 INFO L93 Difference]: Finished difference Result 628 states and 1010 transitions. [2021-12-15 08:59:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:41,546 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 99 [2021-12-15 08:59:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:41,547 INFO L225 Difference]: With dead ends: 628 [2021-12-15 08:59:41,547 INFO L226 Difference]: Without dead ends: 345 [2021-12-15 08:59:41,548 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 [2021-12-15 08:59:41,548 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 29 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:41,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 567 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 08:59:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-15 08:59:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 326. [2021-12-15 08:59:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.603076923076923) internal successors, (521), 325 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:41,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 521 transitions. [2021-12-15 08:59:41,554 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 521 transitions. Word has length 99 [2021-12-15 08:59:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:41,554 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 521 transitions. [2021-12-15 08:59:41,554 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) [2021-12-15 08:59:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 521 transitions. [2021-12-15 08:59:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 08:59:41,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:41,555 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] [2021-12-15 08:59:41,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 08:59:41,556 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash -737527766, now seen corresponding path program 1 times [2021-12-15 08:59:41,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:41,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351597294] [2021-12-15 08:59:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:41,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:59:41,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:41,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351597294] [2021-12-15 08:59:41,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351597294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:41,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:41,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:41,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667539463] [2021-12-15 08:59:41,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:41,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:41,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:41,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:41,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:41,632 INFO L87 Difference]: Start difference. First operand 326 states and 521 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:42,581 INFO L93 Difference]: Finished difference Result 757 states and 1211 transitions. [2021-12-15 08:59:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:42,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-15 08:59:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:42,583 INFO L225 Difference]: With dead ends: 757 [2021-12-15 08:59:42,584 INFO L226 Difference]: Without dead ends: 452 [2021-12-15 08:59:42,584 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 [2021-12-15 08:59:42,584 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 160 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:42,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 438 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 08:59:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-12-15 08:59:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 342. [2021-12-15 08:59:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5806451612903225) internal successors, (539), 341 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 539 transitions. [2021-12-15 08:59:42,590 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 539 transitions. Word has length 106 [2021-12-15 08:59:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:42,591 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 539 transitions. [2021-12-15 08:59:42,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 539 transitions. [2021-12-15 08:59:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-15 08:59:42,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:42,592 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-15 08:59:42,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 08:59:42,592 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash -379210902, now seen corresponding path program 1 times [2021-12-15 08:59:42,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:42,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852992811] [2021-12-15 08:59:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:42,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-15 08:59:42,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:42,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852992811] [2021-12-15 08:59:42,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852992811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:42,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:42,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:42,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789607241] [2021-12-15 08:59:42,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:42,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:42,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:42,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:42,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:42,666 INFO L87 Difference]: Start difference. First operand 342 states and 539 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:43,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:43,196 INFO L93 Difference]: Finished difference Result 680 states and 1076 transitions. [2021-12-15 08:59:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:43,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-15 08:59:43,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:43,197 INFO L225 Difference]: With dead ends: 680 [2021-12-15 08:59:43,197 INFO L226 Difference]: Without dead ends: 359 [2021-12-15 08:59:43,198 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 [2021-12-15 08:59:43,198 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 32 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:43,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 571 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 08:59:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-12-15 08:59:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 342. [2021-12-15 08:59:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5777126099706744) internal successors, (538), 341 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 538 transitions. [2021-12-15 08:59:43,204 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 538 transitions. Word has length 107 [2021-12-15 08:59:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:43,204 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 538 transitions. [2021-12-15 08:59:43,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 538 transitions. [2021-12-15 08:59:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-15 08:59:43,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:43,205 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, 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] [2021-12-15 08:59:43,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 08:59:43,205 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:43,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1014618811, now seen corresponding path program 1 times [2021-12-15 08:59:43,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:43,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619037802] [2021-12-15 08:59:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:43,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-15 08:59:43,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:43,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619037802] [2021-12-15 08:59:43,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619037802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:43,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:43,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:43,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087258998] [2021-12-15 08:59:43,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:43,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:43,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:43,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:43,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:43,280 INFO L87 Difference]: Start difference. First operand 342 states and 538 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) [2021-12-15 08:59:45,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:45,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:45,447 INFO L93 Difference]: Finished difference Result 670 states and 1061 transitions. [2021-12-15 08:59:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:45,448 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 115 [2021-12-15 08:59:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:45,449 INFO L225 Difference]: With dead ends: 670 [2021-12-15 08:59:45,449 INFO L226 Difference]: Without dead ends: 349 [2021-12-15 08:59:45,450 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 [2021-12-15 08:59:45,450 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 27 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 585 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 [2021-12-15 08:59:45,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 585 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-15 08:59:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 342. [2021-12-15 08:59:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5747800586510263) internal successors, (537), 341 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 537 transitions. [2021-12-15 08:59:45,456 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 537 transitions. Word has length 115 [2021-12-15 08:59:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:45,457 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 537 transitions. [2021-12-15 08:59:45,457 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) [2021-12-15 08:59:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 537 transitions. [2021-12-15 08:59:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-15 08:59:45,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:45,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:45,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 08:59:45,458 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1185621468, now seen corresponding path program 1 times [2021-12-15 08:59:45,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:45,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967177900] [2021-12-15 08:59:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:45,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 08:59:45,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:45,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967177900] [2021-12-15 08:59:45,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967177900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:45,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:45,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:45,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649667677] [2021-12-15 08:59:45,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:45,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:45,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:45,541 INFO L87 Difference]: Start difference. First operand 342 states and 537 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:46,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:46,421 INFO L93 Difference]: Finished difference Result 764 states and 1202 transitions. [2021-12-15 08:59:46,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:46,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-15 08:59:46,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:46,423 INFO L225 Difference]: With dead ends: 764 [2021-12-15 08:59:46,423 INFO L226 Difference]: Without dead ends: 443 [2021-12-15 08:59:46,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:46,424 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 92 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:46,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 539 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 08:59:46,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-15 08:59:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 381. [2021-12-15 08:59:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.5789473684210527) internal successors, (600), 380 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 600 transitions. [2021-12-15 08:59:46,431 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 600 transitions. Word has length 121 [2021-12-15 08:59:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:46,431 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 600 transitions. [2021-12-15 08:59:46,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 600 transitions. [2021-12-15 08:59:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-15 08:59:46,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:46,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:46,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 08:59:46,433 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:46,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:46,433 INFO L85 PathProgramCache]: Analyzing trace with hash -346587806, now seen corresponding path program 1 times [2021-12-15 08:59:46,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:46,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454713999] [2021-12-15 08:59:46,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:46,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-15 08:59:46,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:46,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454713999] [2021-12-15 08:59:46,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454713999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:46,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:46,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:46,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267982012] [2021-12-15 08:59:46,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:46,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:46,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:46,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:46,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:46,522 INFO L87 Difference]: Start difference. First operand 381 states and 600 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:47,089 INFO L93 Difference]: Finished difference Result 789 states and 1244 transitions. [2021-12-15 08:59:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:47,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-15 08:59:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:47,091 INFO L225 Difference]: With dead ends: 789 [2021-12-15 08:59:47,091 INFO L226 Difference]: Without dead ends: 429 [2021-12-15 08:59:47,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:47,092 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 36 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:47,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 663 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 08:59:47,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-12-15 08:59:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 405. [2021-12-15 08:59:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.5742574257425743) internal successors, (636), 404 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 636 transitions. [2021-12-15 08:59:47,099 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 636 transitions. Word has length 121 [2021-12-15 08:59:47,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:47,100 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 636 transitions. [2021-12-15 08:59:47,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 636 transitions. [2021-12-15 08:59:47,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-15 08:59:47,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:47,101 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:47,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 08:59:47,101 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1466195913, now seen corresponding path program 1 times [2021-12-15 08:59:47,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:47,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521698092] [2021-12-15 08:59:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:47,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 08:59:47,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:47,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521698092] [2021-12-15 08:59:47,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521698092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:47,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:47,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:47,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926827856] [2021-12-15 08:59:47,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:47,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:47,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:47,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:47,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:47,180 INFO L87 Difference]: Start difference. First operand 405 states and 636 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:49,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:49,434 INFO L93 Difference]: Finished difference Result 848 states and 1332 transitions. [2021-12-15 08:59:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:49,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-12-15 08:59:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:49,436 INFO L225 Difference]: With dead ends: 848 [2021-12-15 08:59:49,436 INFO L226 Difference]: Without dead ends: 464 [2021-12-15 08:59:49,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:49,437 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 87 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:49,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 533 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-15 08:59:49,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 406. [2021-12-15 08:59:49,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.5728395061728395) internal successors, (637), 405 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 637 transitions. [2021-12-15 08:59:49,444 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 637 transitions. Word has length 122 [2021-12-15 08:59:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:49,445 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 637 transitions. [2021-12-15 08:59:49,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 637 transitions. [2021-12-15 08:59:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-15 08:59:49,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:49,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:49,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 08:59:49,446 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:49,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1414034971, now seen corresponding path program 1 times [2021-12-15 08:59:49,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:49,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328419261] [2021-12-15 08:59:49,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:49,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 08:59:49,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:49,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328419261] [2021-12-15 08:59:49,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328419261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:49,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:49,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:49,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366093321] [2021-12-15 08:59:49,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:49,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:49,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:49,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:49,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:49,551 INFO L87 Difference]: Start difference. First operand 406 states and 637 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:51,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:51,646 INFO L93 Difference]: Finished difference Result 917 states and 1442 transitions. [2021-12-15 08:59:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:51,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-15 08:59:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:51,648 INFO L225 Difference]: With dead ends: 917 [2021-12-15 08:59:51,648 INFO L226 Difference]: Without dead ends: 532 [2021-12-15 08:59:51,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:51,649 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 132 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:51,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 439 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 08:59:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-12-15 08:59:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 449. [2021-12-15 08:59:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.5803571428571428) internal successors, (708), 448 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 708 transitions. [2021-12-15 08:59:51,657 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 708 transitions. Word has length 129 [2021-12-15 08:59:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:51,657 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 708 transitions. [2021-12-15 08:59:51,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 708 transitions. [2021-12-15 08:59:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-15 08:59:51,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:51,659 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:51,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 08:59:51,659 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:51,659 INFO L85 PathProgramCache]: Analyzing trace with hash -206259853, now seen corresponding path program 1 times [2021-12-15 08:59:51,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:51,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696929186] [2021-12-15 08:59:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:51,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 08:59:51,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:51,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696929186] [2021-12-15 08:59:51,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696929186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:51,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:51,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:51,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179362046] [2021-12-15 08:59:51,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:51,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:51,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:51,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:51,740 INFO L87 Difference]: Start difference. First operand 449 states and 708 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:53,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:53,563 INFO L93 Difference]: Finished difference Result 933 states and 1471 transitions. [2021-12-15 08:59:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:53,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-15 08:59:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:53,565 INFO L225 Difference]: With dead ends: 933 [2021-12-15 08:59:53,565 INFO L226 Difference]: Without dead ends: 505 [2021-12-15 08:59:53,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:53,566 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 106 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:53,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 535 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 08:59:53,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-12-15 08:59:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 449. [2021-12-15 08:59:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.578125) internal successors, (707), 448 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 707 transitions. [2021-12-15 08:59:53,573 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 707 transitions. Word has length 129 [2021-12-15 08:59:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:53,573 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 707 transitions. [2021-12-15 08:59:53,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 707 transitions. [2021-12-15 08:59:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-15 08:59:53,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:53,575 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:53,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 08:59:53,575 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:53,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2130132657, now seen corresponding path program 1 times [2021-12-15 08:59:53,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:53,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845414609] [2021-12-15 08:59:53,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:53,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:53,656 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 08:59:53,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:53,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845414609] [2021-12-15 08:59:53,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845414609] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:53,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:53,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:53,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142552213] [2021-12-15 08:59:53,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:53,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:53,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:53,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:53,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:53,658 INFO L87 Difference]: Start difference. First operand 449 states and 707 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:55,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:55,625 INFO L93 Difference]: Finished difference Result 963 states and 1516 transitions. [2021-12-15 08:59:55,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:55,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-15 08:59:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:55,627 INFO L225 Difference]: With dead ends: 963 [2021-12-15 08:59:55,627 INFO L226 Difference]: Without dead ends: 535 [2021-12-15 08:59:55,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:55,628 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 159 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:55,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 406 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 08:59:55,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-12-15 08:59:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 449. [2021-12-15 08:59:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.5647321428571428) internal successors, (701), 448 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 701 transitions. [2021-12-15 08:59:55,635 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 701 transitions. Word has length 129 [2021-12-15 08:59:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:55,635 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 701 transitions. [2021-12-15 08:59:55,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 701 transitions. [2021-12-15 08:59:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-15 08:59:55,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:55,636 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:55,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 08:59:55,636 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:55,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1027034840, now seen corresponding path program 1 times [2021-12-15 08:59:55,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:55,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488157755] [2021-12-15 08:59:55,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:55,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:55,709 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 08:59:55,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:55,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488157755] [2021-12-15 08:59:55,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488157755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:55,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:55,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:59:55,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882325004] [2021-12-15 08:59:55,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:55,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:59:55,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:55,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:59:55,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:59:55,711 INFO L87 Difference]: Start difference. First operand 449 states and 701 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:57,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 08:59:57,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:59:57,901 INFO L93 Difference]: Finished difference Result 963 states and 1504 transitions. [2021-12-15 08:59:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:59:57,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 130 [2021-12-15 08:59:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:59:57,902 INFO L225 Difference]: With dead ends: 963 [2021-12-15 08:59:57,903 INFO L226 Difference]: Without dead ends: 533 [2021-12-15 08:59:57,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:57,904 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 132 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:59:57,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 406 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 08:59:57,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-12-15 08:59:57,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 451. [2021-12-15 08:59:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5644444444444445) internal successors, (704), 450 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:57,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 704 transitions. [2021-12-15 08:59:57,911 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 704 transitions. Word has length 130 [2021-12-15 08:59:57,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:59:57,911 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 704 transitions. [2021-12-15 08:59:57,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:59:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 704 transitions. [2021-12-15 08:59:57,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-15 08:59:57,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:59:57,913 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:59:57,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 08:59:57,913 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:59:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:59:57,914 INFO L85 PathProgramCache]: Analyzing trace with hash -539553202, now seen corresponding path program 1 times [2021-12-15 08:59:57,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:59:57,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429408290] [2021-12-15 08:59:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:59:57,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:59:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:59:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-15 08:59:57,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:59:57,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429408290] [2021-12-15 08:59:57,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429408290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:59:57,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:59:57,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 08:59:57,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892338614] [2021-12-15 08:59:57,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:59:57,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 08:59:57,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:59:57,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 08:59:57,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:59:57,995 INFO L87 Difference]: Start difference. First operand 451 states and 704 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:00,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:02,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:02,285 INFO L93 Difference]: Finished difference Result 891 states and 1396 transitions. [2021-12-15 09:00:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 09:00:02,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-12-15 09:00:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:02,287 INFO L225 Difference]: With dead ends: 891 [2021-12-15 09:00:02,287 INFO L226 Difference]: Without dead ends: 461 [2021-12-15 09:00:02,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:00:02,288 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 168 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:02,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 432 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 310 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 09:00:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-15 09:00:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 460. [2021-12-15 09:00:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5577342047930283) internal successors, (715), 459 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:02,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 715 transitions. [2021-12-15 09:00:02,296 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 715 transitions. Word has length 137 [2021-12-15 09:00:02,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:02,297 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 715 transitions. [2021-12-15 09:00:02,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:02,297 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 715 transitions. [2021-12-15 09:00:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-15 09:00:02,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:02,298 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:02,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 09:00:02,298 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:02,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1613158707, now seen corresponding path program 1 times [2021-12-15 09:00:02,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:02,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73559827] [2021-12-15 09:00:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:02,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:00:02,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:02,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73559827] [2021-12-15 09:00:02,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73559827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:02,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:02,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:02,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126774400] [2021-12-15 09:00:02,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:02,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:02,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:02,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:02,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:02,378 INFO L87 Difference]: Start difference. First operand 460 states and 715 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:02,792 INFO L93 Difference]: Finished difference Result 937 states and 1459 transitions. [2021-12-15 09:00:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:02,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-12-15 09:00:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:02,794 INFO L225 Difference]: With dead ends: 937 [2021-12-15 09:00:02,794 INFO L226 Difference]: Without dead ends: 498 [2021-12-15 09:00:02,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:00:02,795 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 89 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:02,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 555 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:00:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-12-15 09:00:02,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 460. [2021-12-15 09:00:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5555555555555556) internal successors, (714), 459 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 714 transitions. [2021-12-15 09:00:02,801 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 714 transitions. Word has length 138 [2021-12-15 09:00:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:02,802 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 714 transitions. [2021-12-15 09:00:02,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 714 transitions. [2021-12-15 09:00:02,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-15 09:00:02,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:02,803 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:02,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 09:00:02,803 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:02,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:02,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1330423371, now seen corresponding path program 1 times [2021-12-15 09:00:02,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:02,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631767325] [2021-12-15 09:00:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:02,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:00:02,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:02,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631767325] [2021-12-15 09:00:02,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631767325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:02,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:02,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:02,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042378457] [2021-12-15 09:00:02,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:02,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:02,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:02,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:02,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:02,905 INFO L87 Difference]: Start difference. First operand 460 states and 714 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:04,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:05,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:05,075 INFO L93 Difference]: Finished difference Result 911 states and 1420 transitions. [2021-12-15 09:00:05,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:05,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-12-15 09:00:05,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:05,077 INFO L225 Difference]: With dead ends: 911 [2021-12-15 09:00:05,077 INFO L226 Difference]: Without dead ends: 472 [2021-12-15 09:00:05,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:00:05,078 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 37 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:05,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 649 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:00:05,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-15 09:00:05,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 460. [2021-12-15 09:00:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.553376906318083) internal successors, (713), 459 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 713 transitions. [2021-12-15 09:00:05,085 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 713 transitions. Word has length 138 [2021-12-15 09:00:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:05,085 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 713 transitions. [2021-12-15 09:00:05,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 713 transitions. [2021-12-15 09:00:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-15 09:00:05,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:05,086 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:05,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 09:00:05,087 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash 204789508, now seen corresponding path program 1 times [2021-12-15 09:00:05,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:05,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616006535] [2021-12-15 09:00:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:05,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 09:00:05,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:05,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616006535] [2021-12-15 09:00:05,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616006535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:05,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:05,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:05,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41623391] [2021-12-15 09:00:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:05,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:05,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:05,168 INFO L87 Difference]: Start difference. First operand 460 states and 713 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:06,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:07,191 INFO L93 Difference]: Finished difference Result 1023 states and 1588 transitions. [2021-12-15 09:00:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:07,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-15 09:00:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:07,193 INFO L225 Difference]: With dead ends: 1023 [2021-12-15 09:00:07,193 INFO L226 Difference]: Without dead ends: 584 [2021-12-15 09:00:07,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:00:07,194 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 143 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:07,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 416 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 09:00:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-12-15 09:00:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 490. [2021-12-15 09:00:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.543967280163599) internal successors, (755), 489 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 755 transitions. [2021-12-15 09:00:07,202 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 755 transitions. Word has length 142 [2021-12-15 09:00:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:07,202 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 755 transitions. [2021-12-15 09:00:07,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:07,202 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 755 transitions. [2021-12-15 09:00:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-15 09:00:07,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:07,203 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:07,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-15 09:00:07,204 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:07,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash -908175233, now seen corresponding path program 1 times [2021-12-15 09:00:07,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:07,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772458720] [2021-12-15 09:00:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:07,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:00:07,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772458720] [2021-12-15 09:00:07,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772458720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:07,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:07,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:07,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608371954] [2021-12-15 09:00:07,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:07,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:07,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:07,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:07,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:07,285 INFO L87 Difference]: Start difference. First operand 490 states and 755 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:09,262 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:09,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:09,542 INFO L93 Difference]: Finished difference Result 1041 states and 1604 transitions. [2021-12-15 09:00:09,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:09,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-12-15 09:00:09,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:09,544 INFO L225 Difference]: With dead ends: 1041 [2021-12-15 09:00:09,544 INFO L226 Difference]: Without dead ends: 572 [2021-12-15 09:00:09,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:00:09,545 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 149 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:09,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 462 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:00:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-12-15 09:00:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 490. [2021-12-15 09:00:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.5296523517382412) internal successors, (748), 489 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 748 transitions. [2021-12-15 09:00:09,552 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 748 transitions. Word has length 143 [2021-12-15 09:00:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:09,552 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 748 transitions. [2021-12-15 09:00:09,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 748 transitions. [2021-12-15 09:00:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-15 09:00:09,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:09,554 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:09,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-15 09:00:09,554 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:09,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:09,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1261572010, now seen corresponding path program 1 times [2021-12-15 09:00:09,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:09,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288208235] [2021-12-15 09:00:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:09,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-15 09:00:09,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:09,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288208235] [2021-12-15 09:00:09,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288208235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:09,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:09,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:09,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750335470] [2021-12-15 09:00:09,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:09,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:09,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:09,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:09,661 INFO L87 Difference]: Start difference. First operand 490 states and 748 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) [2021-12-15 09:00:10,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:10,469 INFO L93 Difference]: Finished difference Result 995 states and 1523 transitions. [2021-12-15 09:00:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:10,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-12-15 09:00:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:10,471 INFO L225 Difference]: With dead ends: 995 [2021-12-15 09:00:10,471 INFO L226 Difference]: Without dead ends: 526 [2021-12-15 09:00:10,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:00:10,472 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 68 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:10,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 573 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:00:10,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-15 09:00:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 490. [2021-12-15 09:00:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.5276073619631902) internal successors, (747), 489 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 747 transitions. [2021-12-15 09:00:10,479 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 747 transitions. Word has length 143 [2021-12-15 09:00:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:10,480 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 747 transitions. [2021-12-15 09:00:10,480 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) [2021-12-15 09:00:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 747 transitions. [2021-12-15 09:00:10,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-15 09:00:10,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:10,481 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:10,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-15 09:00:10,481 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash 989321533, now seen corresponding path program 1 times [2021-12-15 09:00:10,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:10,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251979002] [2021-12-15 09:00:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:10,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 09:00:10,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:10,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251979002] [2021-12-15 09:00:10,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251979002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:10,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:10,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:10,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179212966] [2021-12-15 09:00:10,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:10,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:10,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:10,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:10,580 INFO L87 Difference]: Start difference. First operand 490 states and 747 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:10,654 INFO L93 Difference]: Finished difference Result 1425 states and 2189 transitions. [2021-12-15 09:00:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:10,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-12-15 09:00:10,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:10,657 INFO L225 Difference]: With dead ends: 1425 [2021-12-15 09:00:10,657 INFO L226 Difference]: Without dead ends: 956 [2021-12-15 09:00:10,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:10,660 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:10,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 453 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:00:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-12-15 09:00:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 956. [2021-12-15 09:00:10,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.513089005235602) internal successors, (1445), 955 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1445 transitions. [2021-12-15 09:00:10,684 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1445 transitions. Word has length 143 [2021-12-15 09:00:10,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:10,684 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1445 transitions. [2021-12-15 09:00:10,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1445 transitions. [2021-12-15 09:00:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-15 09:00:10,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:10,687 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:10,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-15 09:00:10,687 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:10,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash -877387141, now seen corresponding path program 1 times [2021-12-15 09:00:10,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:10,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343021541] [2021-12-15 09:00:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:10,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:00:10,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:10,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343021541] [2021-12-15 09:00:10,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343021541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:10,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:10,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:10,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695248130] [2021-12-15 09:00:10,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:10,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:10,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:10,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:10,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:10,759 INFO L87 Difference]: Start difference. First operand 956 states and 1445 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:10,807 INFO L93 Difference]: Finished difference Result 1918 states and 2902 transitions. [2021-12-15 09:00:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-12-15 09:00:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:10,810 INFO L225 Difference]: With dead ends: 1918 [2021-12-15 09:00:10,810 INFO L226 Difference]: Without dead ends: 983 [2021-12-15 09:00:10,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:10,812 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:10,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 434 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-12-15 09:00:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 983. [2021-12-15 09:00:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 1.5071283095723014) internal successors, (1480), 982 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:10,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1480 transitions. [2021-12-15 09:00:10,828 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1480 transitions. Word has length 143 [2021-12-15 09:00:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:10,828 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 1480 transitions. [2021-12-15 09:00:10,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1480 transitions. [2021-12-15 09:00:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-15 09:00:10,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:10,831 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:10,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-15 09:00:10,832 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:10,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1367171257, now seen corresponding path program 1 times [2021-12-15 09:00:10,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:10,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617924500] [2021-12-15 09:00:10,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:10,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-15 09:00:10,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:10,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617924500] [2021-12-15 09:00:10,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617924500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:10,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:10,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:10,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770929705] [2021-12-15 09:00:10,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:10,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:10,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:10,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:10,915 INFO L87 Difference]: Start difference. First operand 983 states and 1480 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:10,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:10,949 INFO L93 Difference]: Finished difference Result 1947 states and 2938 transitions. [2021-12-15 09:00:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:10,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-12-15 09:00:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:10,952 INFO L225 Difference]: With dead ends: 1947 [2021-12-15 09:00:10,952 INFO L226 Difference]: Without dead ends: 985 [2021-12-15 09:00:10,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:10,956 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:10,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 413 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-12-15 09:00:10,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 985. [2021-12-15 09:00:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 1.5060975609756098) internal successors, (1482), 984 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1482 transitions. [2021-12-15 09:00:10,972 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1482 transitions. Word has length 143 [2021-12-15 09:00:10,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:10,972 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 1482 transitions. [2021-12-15 09:00:10,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1482 transitions. [2021-12-15 09:00:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-15 09:00:10,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:10,974 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:10,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-15 09:00:10,975 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:10,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:10,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1324266669, now seen corresponding path program 1 times [2021-12-15 09:00:10,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:10,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957100208] [2021-12-15 09:00:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:10,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-15 09:00:11,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:11,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957100208] [2021-12-15 09:00:11,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957100208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:11,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:11,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:11,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395871269] [2021-12-15 09:00:11,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:11,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:11,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:11,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:11,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:11,055 INFO L87 Difference]: Start difference. First operand 985 states and 1482 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:11,120 INFO L93 Difference]: Finished difference Result 2413 states and 3657 transitions. [2021-12-15 09:00:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:11,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-12-15 09:00:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:11,124 INFO L225 Difference]: With dead ends: 2413 [2021-12-15 09:00:11,124 INFO L226 Difference]: Without dead ends: 1451 [2021-12-15 09:00:11,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:11,126 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 160 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:11,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 594 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:11,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-12-15 09:00:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1451. [2021-12-15 09:00:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 1.5034482758620689) internal successors, (2180), 1450 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 2180 transitions. [2021-12-15 09:00:11,146 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 2180 transitions. Word has length 145 [2021-12-15 09:00:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:11,146 INFO L470 AbstractCegarLoop]: Abstraction has 1451 states and 2180 transitions. [2021-12-15 09:00:11,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 2180 transitions. [2021-12-15 09:00:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-15 09:00:11,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:11,149 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:11,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-15 09:00:11,149 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash 200865794, now seen corresponding path program 1 times [2021-12-15 09:00:11,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:11,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88330337] [2021-12-15 09:00:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:11,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-15 09:00:11,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:11,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88330337] [2021-12-15 09:00:11,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88330337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:11,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:11,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:11,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210230007] [2021-12-15 09:00:11,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:11,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:11,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:11,241 INFO L87 Difference]: Start difference. First operand 1451 states and 2180 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:13,247 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:13,502 INFO L93 Difference]: Finished difference Result 3059 states and 4591 transitions. [2021-12-15 09:00:13,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:13,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-12-15 09:00:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:13,506 INFO L225 Difference]: With dead ends: 3059 [2021-12-15 09:00:13,506 INFO L226 Difference]: Without dead ends: 1631 [2021-12-15 09:00:13,507 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 [2021-12-15 09:00:13,509 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 48 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:13,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 675 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 09:00:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-12-15 09:00:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1535. [2021-12-15 09:00:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 1.5032594524119949) internal successors, (2306), 1534 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:13,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2306 transitions. [2021-12-15 09:00:13,532 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2306 transitions. Word has length 174 [2021-12-15 09:00:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:13,532 INFO L470 AbstractCegarLoop]: Abstraction has 1535 states and 2306 transitions. [2021-12-15 09:00:13,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2306 transitions. [2021-12-15 09:00:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-15 09:00:13,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:13,535 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:13,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-15 09:00:13,536 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash 656569109, now seen corresponding path program 1 times [2021-12-15 09:00:13,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:13,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629448848] [2021-12-15 09:00:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:13,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-15 09:00:13,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:13,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629448848] [2021-12-15 09:00:13,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629448848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:13,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:13,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:13,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104641624] [2021-12-15 09:00:13,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:13,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:13,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:13,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:13,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:13,656 INFO L87 Difference]: Start difference. First operand 1535 states and 2306 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:15,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:15,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:15,694 INFO L93 Difference]: Finished difference Result 3113 states and 4678 transitions. [2021-12-15 09:00:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:15,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-12-15 09:00:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:15,698 INFO L225 Difference]: With dead ends: 3113 [2021-12-15 09:00:15,699 INFO L226 Difference]: Without dead ends: 1601 [2021-12-15 09:00:15,700 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 [2021-12-15 09:00:15,700 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 54 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:15,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 663 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 09:00:15,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2021-12-15 09:00:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1535. [2021-12-15 09:00:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 1.501303780964798) internal successors, (2303), 1534 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2303 transitions. [2021-12-15 09:00:15,728 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2303 transitions. Word has length 191 [2021-12-15 09:00:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:15,729 INFO L470 AbstractCegarLoop]: Abstraction has 1535 states and 2303 transitions. [2021-12-15 09:00:15,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2303 transitions. [2021-12-15 09:00:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-15 09:00:15,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:15,731 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:15,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-15 09:00:15,731 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:15,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1776451503, now seen corresponding path program 1 times [2021-12-15 09:00:15,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:15,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292222950] [2021-12-15 09:00:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:15,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-15 09:00:15,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:15,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292222950] [2021-12-15 09:00:15,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292222950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:15,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:15,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:15,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836957175] [2021-12-15 09:00:15,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:15,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:15,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:15,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:15,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:15,853 INFO L87 Difference]: Start difference. First operand 1535 states and 2303 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:17,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 09:00:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:18,141 INFO L93 Difference]: Finished difference Result 3288 states and 4897 transitions. [2021-12-15 09:00:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:00:18,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-12-15 09:00:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:18,145 INFO L225 Difference]: With dead ends: 3288 [2021-12-15 09:00:18,145 INFO L226 Difference]: Without dead ends: 1776 [2021-12-15 09:00:18,146 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 [2021-12-15 09:00:18,146 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 148 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:18,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 424 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 253 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:00:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2021-12-15 09:00:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1535. [2021-12-15 09:00:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 1.485658409387223) internal successors, (2279), 1534 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2279 transitions. [2021-12-15 09:00:18,169 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2279 transitions. Word has length 197 [2021-12-15 09:00:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:18,169 INFO L470 AbstractCegarLoop]: Abstraction has 1535 states and 2279 transitions. [2021-12-15 09:00:18,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:18,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2279 transitions. [2021-12-15 09:00:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-15 09:00:18,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:18,174 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, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:18,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-15 09:00:18,174 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:18,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:18,174 INFO L85 PathProgramCache]: Analyzing trace with hash -616153681, now seen corresponding path program 1 times [2021-12-15 09:00:18,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:18,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098519784] [2021-12-15 09:00:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:18,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 259 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-15 09:00:18,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:18,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098519784] [2021-12-15 09:00:18,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098519784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:18,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:18,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:18,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636233113] [2021-12-15 09:00:18,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:18,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:18,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:18,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:18,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:18,293 INFO L87 Difference]: Start difference. First operand 1535 states and 2279 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:18,378 INFO L93 Difference]: Finished difference Result 3541 states and 5284 transitions. [2021-12-15 09:00:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:18,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-12-15 09:00:18,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:18,383 INFO L225 Difference]: With dead ends: 3541 [2021-12-15 09:00:18,384 INFO L226 Difference]: Without dead ends: 2029 [2021-12-15 09:00:18,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:18,386 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 157 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:18,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 596 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:00:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-12-15 09:00:18,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2029. [2021-12-15 09:00:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 1.4842209072978303) internal successors, (3010), 2028 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:18,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 3010 transitions. [2021-12-15 09:00:18,416 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 3010 transitions. Word has length 199 [2021-12-15 09:00:18,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:18,416 INFO L470 AbstractCegarLoop]: Abstraction has 2029 states and 3010 transitions. [2021-12-15 09:00:18,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 3010 transitions. [2021-12-15 09:00:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-15 09:00:18,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:18,420 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, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:18,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-15 09:00:18,420 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash 2107016587, now seen corresponding path program 1 times [2021-12-15 09:00:18,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:18,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442937435] [2021-12-15 09:00:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:18,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-12-15 09:00:18,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:18,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442937435] [2021-12-15 09:00:18,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442937435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:18,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:18,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:18,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017209224] [2021-12-15 09:00:18,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:18,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:18,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:18,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:18,538 INFO L87 Difference]: Start difference. First operand 2029 states and 3010 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:18,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:18,622 INFO L93 Difference]: Finished difference Result 4530 states and 6747 transitions. [2021-12-15 09:00:18,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:18,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-12-15 09:00:18,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:18,644 INFO L225 Difference]: With dead ends: 4530 [2021-12-15 09:00:18,644 INFO L226 Difference]: Without dead ends: 2524 [2021-12-15 09:00:18,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:18,646 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 163 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:18,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 386 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:18,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-12-15 09:00:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2524. [2021-12-15 09:00:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 1.485533095521205) internal successors, (3748), 2523 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 3748 transitions. [2021-12-15 09:00:18,680 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 3748 transitions. Word has length 199 [2021-12-15 09:00:18,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:18,681 INFO L470 AbstractCegarLoop]: Abstraction has 2524 states and 3748 transitions. [2021-12-15 09:00:18,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:18,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 3748 transitions. [2021-12-15 09:00:18,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-15 09:00:18,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:18,684 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:18,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-15 09:00:18,684 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:18,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:18,685 INFO L85 PathProgramCache]: Analyzing trace with hash 400144021, now seen corresponding path program 1 times [2021-12-15 09:00:18,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:18,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170361720] [2021-12-15 09:00:18,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:18,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-15 09:00:18,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:18,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170361720] [2021-12-15 09:00:18,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170361720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:18,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:18,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:18,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543287049] [2021-12-15 09:00:18,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:18,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:18,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:18,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:18,834 INFO L87 Difference]: Start difference. First operand 2524 states and 3748 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:18,924 INFO L93 Difference]: Finished difference Result 5520 states and 8223 transitions. [2021-12-15 09:00:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:18,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-12-15 09:00:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:18,929 INFO L225 Difference]: With dead ends: 5520 [2021-12-15 09:00:18,929 INFO L226 Difference]: Without dead ends: 3019 [2021-12-15 09:00:18,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:18,933 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 171 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:18,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 385 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:00:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-12-15 09:00:18,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-12-15 09:00:18,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 3018 states have (on average 1.4867461895294898) internal successors, (4487), 3018 states have internal predecessors, (4487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4487 transitions. [2021-12-15 09:00:18,997 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4487 transitions. Word has length 237 [2021-12-15 09:00:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:18,998 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 4487 transitions. [2021-12-15 09:00:18,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:18,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4487 transitions. [2021-12-15 09:00:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-15 09:00:19,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:19,002 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:19,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-15 09:00:19,003 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:19,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:19,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1685066817, now seen corresponding path program 1 times [2021-12-15 09:00:19,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:19,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598474832] [2021-12-15 09:00:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:19,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-15 09:00:19,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:19,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598474832] [2021-12-15 09:00:19,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598474832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:19,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:19,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:19,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834291102] [2021-12-15 09:00:19,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:19,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:19,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:19,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:19,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:19,199 INFO L87 Difference]: Start difference. First operand 3019 states and 4487 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:19,303 INFO L93 Difference]: Finished difference Result 6510 states and 9701 transitions. [2021-12-15 09:00:19,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:19,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-12-15 09:00:19,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:19,308 INFO L225 Difference]: With dead ends: 6510 [2021-12-15 09:00:19,308 INFO L226 Difference]: Without dead ends: 3514 [2021-12-15 09:00:19,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:19,315 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 172 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:19,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 384 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:00:19,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-12-15 09:00:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 3514. [2021-12-15 09:00:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3514 states, 3513 states have (on average 1.4879020779960148) internal successors, (5227), 3513 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5227 transitions. [2021-12-15 09:00:19,399 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5227 transitions. Word has length 239 [2021-12-15 09:00:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:19,399 INFO L470 AbstractCegarLoop]: Abstraction has 3514 states and 5227 transitions. [2021-12-15 09:00:19,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5227 transitions. [2021-12-15 09:00:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-15 09:00:19,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:19,404 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:19,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-15 09:00:19,405 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:19,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1840467843, now seen corresponding path program 1 times [2021-12-15 09:00:19,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:19,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859965459] [2021-12-15 09:00:19,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:19,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-12-15 09:00:19,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:19,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859965459] [2021-12-15 09:00:19,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859965459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:19,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:19,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:19,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029076477] [2021-12-15 09:00:19,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:19,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:19,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:19,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:19,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:19,536 INFO L87 Difference]: Start difference. First operand 3514 states and 5227 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:19,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:19,657 INFO L93 Difference]: Finished difference Result 7492 states and 11168 transitions. [2021-12-15 09:00:19,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:19,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 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 272 [2021-12-15 09:00:19,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:19,663 INFO L225 Difference]: With dead ends: 7492 [2021-12-15 09:00:19,663 INFO L226 Difference]: Without dead ends: 4001 [2021-12-15 09:00:19,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:19,666 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 152 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:19,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 593 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:00:19,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-12-15 09:00:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 4001. [2021-12-15 09:00:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 4000 states have (on average 1.4875) internal successors, (5950), 4000 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 5950 transitions. [2021-12-15 09:00:19,722 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 5950 transitions. Word has length 272 [2021-12-15 09:00:19,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:19,723 INFO L470 AbstractCegarLoop]: Abstraction has 4001 states and 5950 transitions. [2021-12-15 09:00:19,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 5950 transitions. [2021-12-15 09:00:19,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-12-15 09:00:19,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:19,730 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:19,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-15 09:00:19,730 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:19,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash 943074565, now seen corresponding path program 1 times [2021-12-15 09:00:19,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:19,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285618645] [2021-12-15 09:00:19,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:19,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 330 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-12-15 09:00:19,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:19,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285618645] [2021-12-15 09:00:19,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285618645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:19,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:19,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:19,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894238481] [2021-12-15 09:00:19,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:19,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:19,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:19,875 INFO L87 Difference]: Start difference. First operand 4001 states and 5950 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:19,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:19,986 INFO L93 Difference]: Finished difference Result 8441 states and 12578 transitions. [2021-12-15 09:00:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:19,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 272 [2021-12-15 09:00:19,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:19,993 INFO L225 Difference]: With dead ends: 8441 [2021-12-15 09:00:19,993 INFO L226 Difference]: Without dead ends: 4463 [2021-12-15 09:00:19,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:19,997 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 161 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:19,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 596 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:00:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2021-12-15 09:00:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 4463. [2021-12-15 09:00:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 1.4865531151949798) internal successors, (6633), 4462 states have internal predecessors, (6633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 6633 transitions. [2021-12-15 09:00:20,075 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 6633 transitions. Word has length 272 [2021-12-15 09:00:20,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:20,075 INFO L470 AbstractCegarLoop]: Abstraction has 4463 states and 6633 transitions. [2021-12-15 09:00:20,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 6633 transitions. [2021-12-15 09:00:20,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-12-15 09:00:20,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:20,082 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:20,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-15 09:00:20,082 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:20,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash -43635643, now seen corresponding path program 1 times [2021-12-15 09:00:20,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:20,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190018528] [2021-12-15 09:00:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:20,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 433 proven. 0 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2021-12-15 09:00:20,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:20,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190018528] [2021-12-15 09:00:20,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190018528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:20,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:20,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:20,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541005868] [2021-12-15 09:00:20,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:20,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:20,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:20,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:20,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:20,251 INFO L87 Difference]: Start difference. First operand 4463 states and 6633 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 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) [2021-12-15 09:00:20,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:20,340 INFO L93 Difference]: Finished difference Result 9398 states and 13993 transitions. [2021-12-15 09:00:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:20,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 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 346 [2021-12-15 09:00:20,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:20,348 INFO L225 Difference]: With dead ends: 9398 [2021-12-15 09:00:20,348 INFO L226 Difference]: Without dead ends: 4958 [2021-12-15 09:00:20,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:20,352 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:20,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 381 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:20,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4958 states. [2021-12-15 09:00:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4958 to 4958. [2021-12-15 09:00:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4958 states, 4957 states have (on average 1.487996772241275) internal successors, (7376), 4957 states have internal predecessors, (7376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:20,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4958 states to 4958 states and 7376 transitions. [2021-12-15 09:00:20,415 INFO L78 Accepts]: Start accepts. Automaton has 4958 states and 7376 transitions. Word has length 346 [2021-12-15 09:00:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:20,416 INFO L470 AbstractCegarLoop]: Abstraction has 4958 states and 7376 transitions. [2021-12-15 09:00:20,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 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) [2021-12-15 09:00:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4958 states and 7376 transitions. [2021-12-15 09:00:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-12-15 09:00:20,422 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:20,423 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:20,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-15 09:00:20,423 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash -65350636, now seen corresponding path program 1 times [2021-12-15 09:00:20,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:20,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136729930] [2021-12-15 09:00:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:20,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1440 backedges. 499 proven. 0 refuted. 0 times theorem prover too weak. 941 trivial. 0 not checked. [2021-12-15 09:00:20,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:20,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136729930] [2021-12-15 09:00:20,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136729930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:20,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:20,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:20,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161610810] [2021-12-15 09:00:20,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:20,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:20,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:20,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:20,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:20,574 INFO L87 Difference]: Start difference. First operand 4958 states and 7376 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 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) [2021-12-15 09:00:20,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:20,679 INFO L93 Difference]: Finished difference Result 10388 states and 15479 transitions. [2021-12-15 09:00:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:20,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 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 387 [2021-12-15 09:00:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:20,687 INFO L225 Difference]: With dead ends: 10388 [2021-12-15 09:00:20,687 INFO L226 Difference]: Without dead ends: 5453 [2021-12-15 09:00:20,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:20,693 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:20,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 380 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:00:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2021-12-15 09:00:20,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 5453. [2021-12-15 09:00:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5453 states, 5452 states have (on average 1.4893617021276595) internal successors, (8120), 5452 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5453 states to 5453 states and 8120 transitions. [2021-12-15 09:00:20,812 INFO L78 Accepts]: Start accepts. Automaton has 5453 states and 8120 transitions. Word has length 387 [2021-12-15 09:00:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:20,812 INFO L470 AbstractCegarLoop]: Abstraction has 5453 states and 8120 transitions. [2021-12-15 09:00:20,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 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) [2021-12-15 09:00:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 5453 states and 8120 transitions. [2021-12-15 09:00:20,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-12-15 09:00:20,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:20,819 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:20,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-15 09:00:20,820 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1652971603, now seen corresponding path program 1 times [2021-12-15 09:00:20,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:20,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472052888] [2021-12-15 09:00:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:20,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 285 proven. 0 refuted. 0 times theorem prover too weak. 1160 trivial. 0 not checked. [2021-12-15 09:00:20,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:20,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472052888] [2021-12-15 09:00:20,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472052888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:20,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:20,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:20,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755578272] [2021-12-15 09:00:20,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:20,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:20,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:20,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:20,945 INFO L87 Difference]: Start difference. First operand 5453 states and 8120 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:21,041 INFO L93 Difference]: Finished difference Result 11371 states and 16956 transitions. [2021-12-15 09:00:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:21,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 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 395 [2021-12-15 09:00:21,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:21,050 INFO L225 Difference]: With dead ends: 11371 [2021-12-15 09:00:21,050 INFO L226 Difference]: Without dead ends: 5941 [2021-12-15 09:00:21,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:21,055 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 150 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:21,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 593 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:21,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2021-12-15 09:00:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 5941. [2021-12-15 09:00:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5941 states, 5940 states have (on average 1.488888888888889) internal successors, (8844), 5940 states have internal predecessors, (8844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5941 states to 5941 states and 8844 transitions. [2021-12-15 09:00:21,132 INFO L78 Accepts]: Start accepts. Automaton has 5941 states and 8844 transitions. Word has length 395 [2021-12-15 09:00:21,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:21,132 INFO L470 AbstractCegarLoop]: Abstraction has 5941 states and 8844 transitions. [2021-12-15 09:00:21,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:21,133 INFO L276 IsEmpty]: Start isEmpty. Operand 5941 states and 8844 transitions. [2021-12-15 09:00:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-12-15 09:00:21,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:21,142 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 9, 9, 9, 8, 8, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:21,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-15 09:00:21,142 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2070019517, now seen corresponding path program 1 times [2021-12-15 09:00:21,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:21,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601310724] [2021-12-15 09:00:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:21,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2114 backedges. 637 proven. 0 refuted. 0 times theorem prover too weak. 1477 trivial. 0 not checked. [2021-12-15 09:00:21,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:21,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601310724] [2021-12-15 09:00:21,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601310724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:21,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:21,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:00:21,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411471578] [2021-12-15 09:00:21,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:21,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:21,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:21,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:21,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:21,333 INFO L87 Difference]: Start difference. First operand 5941 states and 8844 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:21,442 INFO L93 Difference]: Finished difference Result 12354 states and 18415 transitions. [2021-12-15 09:00:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 470 [2021-12-15 09:00:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:21,452 INFO L225 Difference]: With dead ends: 12354 [2021-12-15 09:00:21,453 INFO L226 Difference]: Without dead ends: 6436 [2021-12-15 09:00:21,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:00:21,459 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 160 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:21,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 378 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 09:00:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6436 states. [2021-12-15 09:00:21,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6436 to 6436. [2021-12-15 09:00:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6436 states, 6435 states have (on average 1.4902874902874903) internal successors, (9590), 6435 states have internal predecessors, (9590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6436 states to 6436 states and 9590 transitions. [2021-12-15 09:00:21,547 INFO L78 Accepts]: Start accepts. Automaton has 6436 states and 9590 transitions. Word has length 470 [2021-12-15 09:00:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:21,547 INFO L470 AbstractCegarLoop]: Abstraction has 6436 states and 9590 transitions. [2021-12-15 09:00:21,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6436 states and 9590 transitions. [2021-12-15 09:00:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2021-12-15 09:00:21,556 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:21,557 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:21,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-15 09:00:21,557 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:21,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:21,557 INFO L85 PathProgramCache]: Analyzing trace with hash -7507425, now seen corresponding path program 1 times [2021-12-15 09:00:21,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:21,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026207657] [2021-12-15 09:00:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:21,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 741 proven. 9 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2021-12-15 09:00:21,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:21,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026207657] [2021-12-15 09:00:21,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026207657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:00:21,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348939531] [2021-12-15 09:00:21,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:21,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:00:21,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:00:21,773 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) [2021-12-15 09:00:21,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:00:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:22,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 2351 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:00:22,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:00:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2506 backedges. 702 proven. 0 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2021-12-15 09:00:23,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:00:23,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348939531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:23,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:00:23,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 09:00:23,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105443081] [2021-12-15 09:00:23,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:23,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:00:23,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:23,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:00:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:00:23,362 INFO L87 Difference]: Start difference. First operand 6436 states and 9590 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 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) [2021-12-15 09:00:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:00:23,504 INFO L93 Difference]: Finished difference Result 13344 states and 19907 transitions. [2021-12-15 09:00:23,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:00:23,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 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 512 [2021-12-15 09:00:23,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:00:23,513 INFO L225 Difference]: With dead ends: 13344 [2021-12-15 09:00:23,514 INFO L226 Difference]: Without dead ends: 6931 [2021-12-15 09:00:23,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:00:23,520 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 161 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:00:23,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 377 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:00:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6931 states. [2021-12-15 09:00:23,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6931 to 6931. [2021-12-15 09:00:23,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6931 states, 6930 states have (on average 1.4916305916305916) internal successors, (10337), 6930 states have internal predecessors, (10337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:00:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6931 states to 6931 states and 10337 transitions. [2021-12-15 09:00:23,633 INFO L78 Accepts]: Start accepts. Automaton has 6931 states and 10337 transitions. Word has length 512 [2021-12-15 09:00:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:00:23,634 INFO L470 AbstractCegarLoop]: Abstraction has 6931 states and 10337 transitions. [2021-12-15 09:00:23,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 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) [2021-12-15 09:00:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 6931 states and 10337 transitions. [2021-12-15 09:00:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2021-12-15 09:00:23,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:00:23,646 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:00:23,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:00:23,859 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,SelfDestructingSolverStorable46 [2021-12-15 09:00:23,859 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:00:23,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:00:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash -138901474, now seen corresponding path program 1 times [2021-12-15 09:00:23,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:00:23,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634477518] [2021-12-15 09:00:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:00:23,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:00:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:00:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2528 backedges. 1473 proven. 0 refuted. 0 times theorem prover too weak. 1055 trivial. 0 not checked. [2021-12-15 09:00:24,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:00:24,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634477518] [2021-12-15 09:00:24,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634477518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:00:24,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:00:24,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:00:24,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013493811] [2021-12-15 09:00:24,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:00:24,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:00:24,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:00:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:00:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:00:24,079 INFO L87 Difference]: Start difference. First operand 6931 states and 10337 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)