./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.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/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.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 62204da2eab9fabc07e0a3780bac6c183714a9a5b9e2b6bd6a8ef0836349aca5 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:13:59,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:13:59,319 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:13:59,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:13:59,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:13:59,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:13:59,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:13:59,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:13:59,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:13:59,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:13:59,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:13:59,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:13:59,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:13:59,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:13:59,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:13:59,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:13:59,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:13:59,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:13:59,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:13:59,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:13:59,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:13:59,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:13:59,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:13:59,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:13:59,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:13:59,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:13:59,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:13:59,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:13:59,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:13:59,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:13:59,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:13:59,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:13:59,431 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:13:59,431 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:13:59,432 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:13:59,432 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:13:59,433 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:13:59,433 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:13:59,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:13:59,434 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:13:59,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:13:59,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:13:59,452 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:13:59,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:13:59,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:13:59,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:13:59,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:13:59,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:13:59,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:13:59,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:13:59,454 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:13:59,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:13:59,454 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:13:59,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:13:59,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:13:59,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:13:59,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:13:59,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:13:59,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:13:59,455 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:13:59,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:13:59,460 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:13:59,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:13:59,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:13:59,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:13:59,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:13:59,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:13:59,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:13:59,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:13:59,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:13:59,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:13:59,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:13:59,462 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:13:59,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:13:59,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:13:59,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:13:59,463 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62204da2eab9fabc07e0a3780bac6c183714a9a5b9e2b6bd6a8ef0836349aca5 [2021-12-15 11:13:59,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:13:59,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:13:59,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:13:59,698 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:13:59,698 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:13:59,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c [2021-12-15 11:13:59,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1d5324f/6b84018845d94ed0895f803a02987215/FLAG1461341a0 [2021-12-15 11:14:00,380 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:14:00,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c [2021-12-15 11:14:00,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1d5324f/6b84018845d94ed0895f803a02987215/FLAG1461341a0 [2021-12-15 11:14:00,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef1d5324f/6b84018845d94ed0895f803a02987215 [2021-12-15 11:14:00,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:14:00,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:14:00,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:14:00,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:14:00,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:14:00,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:14:00" (1/1) ... [2021-12-15 11:14:00,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a122022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:00, skipping insertion in model container [2021-12-15 11:14:00,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:14:00" (1/1) ... [2021-12-15 11:14:00,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:14:00,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:14:01,096 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/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c[28366,28379] [2021-12-15 11:14:01,100 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:14:01,108 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:14:01,195 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/seq-mthreaded/pals_floodmax.4.ufo.UNBOUNDED.pals.c[28366,28379] [2021-12-15 11:14:01,198 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:14:01,209 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:14:01,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01 WrapperNode [2021-12-15 11:14:01,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:14:01,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:14:01,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:14:01,214 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:14:01,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01" (1/1) ... [2021-12-15 11:14:01,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01" (1/1) ... [2021-12-15 11:14:01,286 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 952 [2021-12-15 11:14:01,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:14:01,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:14:01,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:14:01,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:14:01,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01" (1/1) ... [2021-12-15 11:14:01,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01" (1/1) ... [2021-12-15 11:14:01,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01" (1/1) ... [2021-12-15 11:14:01,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01" (1/1) ... [2021-12-15 11:14:01,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01" (1/1) ... [2021-12-15 11:14:01,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01" (1/1) ... [2021-12-15 11:14:01,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01" (1/1) ... [2021-12-15 11:14:01,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:14:01,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:14:01,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:14:01,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:14:01,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01" (1/1) ... [2021-12-15 11:14:01,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:14:01,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:14:01,405 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 11:14:01,411 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 11:14:01,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:14:01,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:14:01,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:14:01,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:14:01,556 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:14:01,561 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:14:02,400 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:14:02,408 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:14:02,408 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 11:14:02,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:14:02 BoogieIcfgContainer [2021-12-15 11:14:02,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:14:02,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:14:02,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:14:02,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:14:02,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:14:00" (1/3) ... [2021-12-15 11:14:02,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d01111e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:14:02, skipping insertion in model container [2021-12-15 11:14:02,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:14:01" (2/3) ... [2021-12-15 11:14:02,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d01111e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:14:02, skipping insertion in model container [2021-12-15 11:14:02,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:14:02" (3/3) ... [2021-12-15 11:14:02,416 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.UNBOUNDED.pals.c [2021-12-15 11:14:02,419 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:14:02,420 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:14:02,451 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:14:02,456 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 11:14:02,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:14:02,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 310 states have (on average 1.8) internal successors, (558), 311 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 11:14:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 11:14:02,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:02,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:02,484 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:02,488 INFO L85 PathProgramCache]: Analyzing trace with hash 883240596, now seen corresponding path program 1 times [2021-12-15 11:14:02,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:02,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369720729] [2021-12-15 11:14:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:02,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:02,748 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 11:14:02,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:02,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369720729] [2021-12-15 11:14:02,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369720729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:02,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:02,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 11:14:02,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864380167] [2021-12-15 11:14:02,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:02,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 11:14:02,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:02,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 11:14:02,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:14:02,778 INFO L87 Difference]: Start difference. First operand has 312 states, 310 states have (on average 1.8) internal successors, (558), 311 states have internal predecessors, (558), 0 states have call successors, (0), 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 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:02,822 INFO L93 Difference]: Finished difference Result 429 states and 759 transitions. [2021-12-15 11:14:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 11:14:02,824 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 11:14:02,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:02,840 INFO L225 Difference]: With dead ends: 429 [2021-12-15 11:14:02,841 INFO L226 Difference]: Without dead ends: 308 [2021-12-15 11:14:02,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 11:14:02,849 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:02,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:02,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-15 11:14:02,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-12-15 11:14:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.794788273615635) internal successors, (551), 307 states have internal predecessors, (551), 0 states have call successors, (0), 0 states 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 11:14:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 551 transitions. [2021-12-15 11:14:02,919 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 551 transitions. Word has length 77 [2021-12-15 11:14:02,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:02,920 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 551 transitions. [2021-12-15 11:14:02,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 551 transitions. [2021-12-15 11:14:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 11:14:02,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:02,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:02,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:14:02,932 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:02,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:02,935 INFO L85 PathProgramCache]: Analyzing trace with hash 749227090, now seen corresponding path program 1 times [2021-12-15 11:14:02,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:02,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119749195] [2021-12-15 11:14:02,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:02,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:03,184 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 11:14:03,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:03,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119749195] [2021-12-15 11:14:03,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119749195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:03,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:03,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:14:03,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857417754] [2021-12-15 11:14:03,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:03,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:14:03,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:03,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:14:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:14:03,188 INFO L87 Difference]: Start difference. First operand 308 states and 551 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:03,283 INFO L93 Difference]: Finished difference Result 428 states and 752 transitions. [2021-12-15 11:14:03,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:14:03,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 11:14:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:03,285 INFO L225 Difference]: With dead ends: 428 [2021-12-15 11:14:03,285 INFO L226 Difference]: Without dead ends: 308 [2021-12-15 11:14:03,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:14:03,288 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 3 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:03,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2151 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:14:03,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-15 11:14:03,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-12-15 11:14:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.6579804560260587) internal successors, (509), 307 states have internal predecessors, (509), 0 states have call successors, (0), 0 states 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 11:14:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 509 transitions. [2021-12-15 11:14:03,297 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 509 transitions. Word has length 77 [2021-12-15 11:14:03,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:03,297 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 509 transitions. [2021-12-15 11:14:03,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:03,298 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 509 transitions. [2021-12-15 11:14:03,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-15 11:14:03,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:03,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:03,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:14:03,300 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:03,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:03,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1045938854, now seen corresponding path program 1 times [2021-12-15 11:14:03,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:03,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902040369] [2021-12-15 11:14:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:03,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:03,448 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 11:14:03,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:03,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902040369] [2021-12-15 11:14:03,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902040369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:03,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:03,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:14:03,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565529200] [2021-12-15 11:14:03,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:03,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:14:03,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:03,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:14:03,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:14:03,453 INFO L87 Difference]: Start difference. First operand 308 states and 509 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:03,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:03,492 INFO L93 Difference]: Finished difference Result 529 states and 882 transitions. [2021-12-15 11:14:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:14:03,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-12-15 11:14:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:03,495 INFO L225 Difference]: With dead ends: 529 [2021-12-15 11:14:03,495 INFO L226 Difference]: Without dead ends: 413 [2021-12-15 11:14:03,497 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 11:14:03,501 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 167 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:03,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 959 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-12-15 11:14:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 410. [2021-12-15 11:14:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.6552567237163813) internal successors, (677), 409 states have internal predecessors, (677), 0 states have call successors, (0), 0 states 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 11:14:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 677 transitions. [2021-12-15 11:14:03,512 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 677 transitions. Word has length 118 [2021-12-15 11:14:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:03,514 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 677 transitions. [2021-12-15 11:14:03,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 677 transitions. [2021-12-15 11:14:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-15 11:14:03,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:03,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:03,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:14:03,520 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1919052267, now seen corresponding path program 1 times [2021-12-15 11:14:03,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:03,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616766356] [2021-12-15 11:14:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:03,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:03,588 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 11:14:03,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:03,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616766356] [2021-12-15 11:14:03,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616766356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:03,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:03,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:14:03,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519239384] [2021-12-15 11:14:03,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:03,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:14:03,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:03,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:14:03,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:14:03,591 INFO L87 Difference]: Start difference. First operand 410 states and 677 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:03,616 INFO L93 Difference]: Finished difference Result 828 states and 1373 transitions. [2021-12-15 11:14:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:14:03,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-15 11:14:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:03,619 INFO L225 Difference]: With dead ends: 828 [2021-12-15 11:14:03,619 INFO L226 Difference]: Without dead ends: 610 [2021-12-15 11:14:03,620 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 11:14:03,621 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 168 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:03,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 971 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:03,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-15 11:14:03,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 606. [2021-12-15 11:14:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.6545454545454545) internal successors, (1001), 605 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states 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 11:14:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1001 transitions. [2021-12-15 11:14:03,634 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1001 transitions. Word has length 121 [2021-12-15 11:14:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:03,634 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1001 transitions. [2021-12-15 11:14:03,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1001 transitions. [2021-12-15 11:14:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-15 11:14:03,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:03,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:03,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:14:03,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:03,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1777448074, now seen corresponding path program 1 times [2021-12-15 11:14:03,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:03,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292438399] [2021-12-15 11:14:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:03,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:03,718 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 11:14:03,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:03,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292438399] [2021-12-15 11:14:03,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292438399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:03,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:03,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:14:03,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189257107] [2021-12-15 11:14:03,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:03,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:14:03,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:03,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:14:03,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:14:03,720 INFO L87 Difference]: Start difference. First operand 606 states and 1001 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:03,749 INFO L93 Difference]: Finished difference Result 1398 states and 2311 transitions. [2021-12-15 11:14:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:14:03,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-12-15 11:14:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:03,753 INFO L225 Difference]: With dead ends: 1398 [2021-12-15 11:14:03,753 INFO L226 Difference]: Without dead ends: 984 [2021-12-15 11:14:03,754 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 11:14:03,755 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 161 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:03,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 972 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-12-15 11:14:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 978. [2021-12-15 11:14:03,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 1.646878198567042) internal successors, (1609), 977 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states 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 11:14:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1609 transitions. [2021-12-15 11:14:03,772 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1609 transitions. Word has length 124 [2021-12-15 11:14:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:03,772 INFO L470 AbstractCegarLoop]: Abstraction has 978 states and 1609 transitions. [2021-12-15 11:14:03,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1609 transitions. [2021-12-15 11:14:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-15 11:14:03,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:03,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:03,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:14:03,774 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash 78545669, now seen corresponding path program 1 times [2021-12-15 11:14:03,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:03,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301601296] [2021-12-15 11:14:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:03,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:03,821 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 11:14:03,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:03,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301601296] [2021-12-15 11:14:03,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301601296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:03,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:03,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:14:03,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185228335] [2021-12-15 11:14:03,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:03,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:14:03,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:03,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:14:03,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:14:03,823 INFO L87 Difference]: Start difference. First operand 978 states and 1609 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:03,856 INFO L93 Difference]: Finished difference Result 2478 states and 4067 transitions. [2021-12-15 11:14:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:14:03,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-15 11:14:03,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:03,861 INFO L225 Difference]: With dead ends: 2478 [2021-12-15 11:14:03,862 INFO L226 Difference]: Without dead ends: 1692 [2021-12-15 11:14:03,863 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 11:14:03,865 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 154 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:03,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 973 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:03,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-12-15 11:14:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1682. [2021-12-15 11:14:03,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1681 states have (on average 1.6329565734681737) internal successors, (2745), 1681 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states 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 11:14:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2745 transitions. [2021-12-15 11:14:03,899 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2745 transitions. Word has length 127 [2021-12-15 11:14:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:03,899 INFO L470 AbstractCegarLoop]: Abstraction has 1682 states and 2745 transitions. [2021-12-15 11:14:03,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2745 transitions. [2021-12-15 11:14:03,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-15 11:14:03,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:03,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:03,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:14:03,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:03,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:03,902 INFO L85 PathProgramCache]: Analyzing trace with hash -579836998, now seen corresponding path program 1 times [2021-12-15 11:14:03,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:03,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408835475] [2021-12-15 11:14:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:03,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:03,980 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 11:14:03,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:03,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408835475] [2021-12-15 11:14:03,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408835475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:03,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:03,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:14:03,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535113377] [2021-12-15 11:14:03,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:03,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:14:03,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:04,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:14:04,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:14:04,001 INFO L87 Difference]: Start difference. First operand 1682 states and 2745 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 11:14:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:04,255 INFO L93 Difference]: Finished difference Result 8642 states and 14261 transitions. [2021-12-15 11:14:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 11:14:04,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 130 [2021-12-15 11:14:04,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:04,277 INFO L225 Difference]: With dead ends: 8642 [2021-12-15 11:14:04,278 INFO L226 Difference]: Without dead ends: 7152 [2021-12-15 11:14:04,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-15 11:14:04,287 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 1536 mSDsluCounter, 4056 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 4567 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:04,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1536 Valid, 4567 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:14:04,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7152 states. [2021-12-15 11:14:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7152 to 3070. [2021-12-15 11:14:04,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3070 states, 3069 states have (on average 1.632453567937439) internal successors, (5010), 3069 states have internal predecessors, (5010), 0 states have call successors, (0), 0 states 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 11:14:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 5010 transitions. [2021-12-15 11:14:04,382 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 5010 transitions. Word has length 130 [2021-12-15 11:14:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:04,382 INFO L470 AbstractCegarLoop]: Abstraction has 3070 states and 5010 transitions. [2021-12-15 11:14:04,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 11:14:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 5010 transitions. [2021-12-15 11:14:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-15 11:14:04,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:04,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:04,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:14:04,385 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1405282905, now seen corresponding path program 1 times [2021-12-15 11:14:04,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:04,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506833842] [2021-12-15 11:14:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:04,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:04,478 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 11:14:04,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:04,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506833842] [2021-12-15 11:14:04,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506833842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:04,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:04,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:14:04,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118701575] [2021-12-15 11:14:04,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:04,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:14:04,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:04,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:14:04,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:14:04,481 INFO L87 Difference]: Start difference. First operand 3070 states and 5010 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:04,608 INFO L93 Difference]: Finished difference Result 8952 states and 14718 transitions. [2021-12-15 11:14:04,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:14:04,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-12-15 11:14:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:04,626 INFO L225 Difference]: With dead ends: 8952 [2021-12-15 11:14:04,626 INFO L226 Difference]: Without dead ends: 6074 [2021-12-15 11:14:04,632 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 11:14:04,632 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 565 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:04,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1655 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6074 states. [2021-12-15 11:14:04,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6074 to 4555. [2021-12-15 11:14:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 1.636802810715854) internal successors, (7454), 4554 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states 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 11:14:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 7454 transitions. [2021-12-15 11:14:04,772 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 7454 transitions. Word has length 131 [2021-12-15 11:14:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:04,772 INFO L470 AbstractCegarLoop]: Abstraction has 4555 states and 7454 transitions. [2021-12-15 11:14:04,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 7454 transitions. [2021-12-15 11:14:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-15 11:14:04,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:04,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:04,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:14:04,777 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:04,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:04,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1311505199, now seen corresponding path program 1 times [2021-12-15 11:14:04,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:04,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223007540] [2021-12-15 11:14:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:04,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:04,832 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 11:14:04,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223007540] [2021-12-15 11:14:04,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223007540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:04,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:04,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:14:04,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539759685] [2021-12-15 11:14:04,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:04,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:14:04,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:04,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:14:04,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:14:04,834 INFO L87 Difference]: Start difference. First operand 4555 states and 7454 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:05,019 INFO L93 Difference]: Finished difference Result 13332 states and 21904 transitions. [2021-12-15 11:14:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:14:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-15 11:14:05,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:05,046 INFO L225 Difference]: With dead ends: 13332 [2021-12-15 11:14:05,046 INFO L226 Difference]: Without dead ends: 8969 [2021-12-15 11:14:05,055 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 11:14:05,055 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 565 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:05,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1645 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:05,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8969 states. [2021-12-15 11:14:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8969 to 6738. [2021-12-15 11:14:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6738 states, 6737 states have (on average 1.6355944782544158) internal successors, (11019), 6737 states have internal predecessors, (11019), 0 states have call successors, (0), 0 states 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 11:14:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 11019 transitions. [2021-12-15 11:14:05,241 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 11019 transitions. Word has length 132 [2021-12-15 11:14:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:05,242 INFO L470 AbstractCegarLoop]: Abstraction has 6738 states and 11019 transitions. [2021-12-15 11:14:05,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 11019 transitions. [2021-12-15 11:14:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-15 11:14:05,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:05,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:05,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:14:05,246 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:05,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:05,247 INFO L85 PathProgramCache]: Analyzing trace with hash -547474472, now seen corresponding path program 1 times [2021-12-15 11:14:05,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:05,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239197172] [2021-12-15 11:14:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:05,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:05,289 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 11:14:05,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:05,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239197172] [2021-12-15 11:14:05,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239197172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:05,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:05,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:14:05,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312636676] [2021-12-15 11:14:05,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:05,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:14:05,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:14:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:14:05,292 INFO L87 Difference]: Start difference. First operand 6738 states and 11019 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 11:14:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:05,463 INFO L93 Difference]: Finished difference Result 14989 states and 24645 transitions. [2021-12-15 11:14:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:14:05,463 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 133 [2021-12-15 11:14:05,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:05,484 INFO L225 Difference]: With dead ends: 14989 [2021-12-15 11:14:05,484 INFO L226 Difference]: Without dead ends: 10369 [2021-12-15 11:14:05,493 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 11:14:05,494 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 174 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:05,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 1133 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10369 states. [2021-12-15 11:14:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10369 to 10367. [2021-12-15 11:14:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10367 states, 10366 states have (on average 1.6335134092224581) internal successors, (16933), 10366 states have internal predecessors, (16933), 0 states have call successors, (0), 0 states 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 11:14:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10367 states to 10367 states and 16933 transitions. [2021-12-15 11:14:05,816 INFO L78 Accepts]: Start accepts. Automaton has 10367 states and 16933 transitions. Word has length 133 [2021-12-15 11:14:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:05,817 INFO L470 AbstractCegarLoop]: Abstraction has 10367 states and 16933 transitions. [2021-12-15 11:14:05,818 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 11:14:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 10367 states and 16933 transitions. [2021-12-15 11:14:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-15 11:14:05,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:05,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:05,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:14:05,821 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:05,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1576389218, now seen corresponding path program 1 times [2021-12-15 11:14:05,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:05,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440838435] [2021-12-15 11:14:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:05,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:05,867 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 11:14:05,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440838435] [2021-12-15 11:14:05,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440838435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:05,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:05,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:14:05,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762713370] [2021-12-15 11:14:05,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:05,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:14:05,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:05,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:14:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:14:05,871 INFO L87 Difference]: Start difference. First operand 10367 states and 16933 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 11:14:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:06,166 INFO L93 Difference]: Finished difference Result 22920 states and 37484 transitions. [2021-12-15 11:14:06,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:14:06,167 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 133 [2021-12-15 11:14:06,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:06,203 INFO L225 Difference]: With dead ends: 22920 [2021-12-15 11:14:06,204 INFO L226 Difference]: Without dead ends: 15821 [2021-12-15 11:14:06,211 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 11:14:06,212 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 167 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:06,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1123 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15821 states. [2021-12-15 11:14:06,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15821 to 15819. [2021-12-15 11:14:06,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15819 states, 15818 states have (on average 1.6255531672777848) internal successors, (25713), 15818 states have internal predecessors, (25713), 0 states have call successors, (0), 0 states 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 11:14:06,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15819 states to 15819 states and 25713 transitions. [2021-12-15 11:14:06,595 INFO L78 Accepts]: Start accepts. Automaton has 15819 states and 25713 transitions. Word has length 133 [2021-12-15 11:14:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:06,595 INFO L470 AbstractCegarLoop]: Abstraction has 15819 states and 25713 transitions. [2021-12-15 11:14:06,595 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 11:14:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 15819 states and 25713 transitions. [2021-12-15 11:14:06,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-15 11:14:06,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:06,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:06,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:14:06,598 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:06,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:06,598 INFO L85 PathProgramCache]: Analyzing trace with hash 721034008, now seen corresponding path program 1 times [2021-12-15 11:14:06,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:06,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369096260] [2021-12-15 11:14:06,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:06,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:06,655 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 11:14:06,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:06,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369096260] [2021-12-15 11:14:06,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369096260] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:06,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:06,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:14:06,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037092604] [2021-12-15 11:14:06,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:06,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:14:06,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:06,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:14:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:14:06,658 INFO L87 Difference]: Start difference. First operand 15819 states and 25713 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 11:14:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:06,976 INFO L93 Difference]: Finished difference Result 30877 states and 50296 transitions. [2021-12-15 11:14:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:14:06,976 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 133 [2021-12-15 11:14:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:07,017 INFO L225 Difference]: With dead ends: 30877 [2021-12-15 11:14:07,017 INFO L226 Difference]: Without dead ends: 22254 [2021-12-15 11:14:07,034 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 11:14:07,035 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 160 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:07,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1106 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22254 states. [2021-12-15 11:14:07,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22254 to 22252. [2021-12-15 11:14:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22252 states, 22251 states have (on average 1.6184441148712418) internal successors, (36012), 22251 states have internal predecessors, (36012), 0 states have call successors, (0), 0 states 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 11:14:07,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22252 states to 22252 states and 36012 transitions. [2021-12-15 11:14:07,513 INFO L78 Accepts]: Start accepts. Automaton has 22252 states and 36012 transitions. Word has length 133 [2021-12-15 11:14:07,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:07,514 INFO L470 AbstractCegarLoop]: Abstraction has 22252 states and 36012 transitions. [2021-12-15 11:14:07,514 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 11:14:07,514 INFO L276 IsEmpty]: Start isEmpty. Operand 22252 states and 36012 transitions. [2021-12-15 11:14:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-15 11:14:07,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:07,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:07,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:14:07,516 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:07,516 INFO L85 PathProgramCache]: Analyzing trace with hash 536413840, now seen corresponding path program 1 times [2021-12-15 11:14:07,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:07,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004701817] [2021-12-15 11:14:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:07,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:07,575 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 11:14:07,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:07,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004701817] [2021-12-15 11:14:07,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004701817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:07,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:07,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:14:07,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863147726] [2021-12-15 11:14:07,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:07,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:14:07,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:07,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:14:07,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:14:07,578 INFO L87 Difference]: Start difference. First operand 22252 states and 36012 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:08,441 INFO L93 Difference]: Finished difference Result 71884 states and 116652 transitions. [2021-12-15 11:14:08,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:14:08,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-12-15 11:14:08,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:08,557 INFO L225 Difference]: With dead ends: 71884 [2021-12-15 11:14:08,558 INFO L226 Difference]: Without dead ends: 49852 [2021-12-15 11:14:08,593 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 11:14:08,594 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 563 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1647 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:08,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 1647 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49852 states. [2021-12-15 11:14:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49852 to 35959. [2021-12-15 11:14:09,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35959 states, 35958 states have (on average 1.6142722064630959) internal successors, (58046), 35958 states have internal predecessors, (58046), 0 states have call successors, (0), 0 states 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 11:14:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35959 states to 35959 states and 58046 transitions. [2021-12-15 11:14:09,760 INFO L78 Accepts]: Start accepts. Automaton has 35959 states and 58046 transitions. Word has length 133 [2021-12-15 11:14:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:09,761 INFO L470 AbstractCegarLoop]: Abstraction has 35959 states and 58046 transitions. [2021-12-15 11:14:09,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:09,761 INFO L276 IsEmpty]: Start isEmpty. Operand 35959 states and 58046 transitions. [2021-12-15 11:14:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-15 11:14:09,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:09,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:09,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:14:09,763 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:09,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:09,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1673295070, now seen corresponding path program 1 times [2021-12-15 11:14:09,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:09,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098049407] [2021-12-15 11:14:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:09,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:09,826 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 11:14:09,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:09,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098049407] [2021-12-15 11:14:09,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098049407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:09,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:09,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:14:09,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473983177] [2021-12-15 11:14:09,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:09,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:14:09,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:09,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:14:09,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:14:09,828 INFO L87 Difference]: Start difference. First operand 35959 states and 58046 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 11:14:10,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:10,655 INFO L93 Difference]: Finished difference Result 70577 states and 114169 transitions. [2021-12-15 11:14:10,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:14:10,655 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 133 [2021-12-15 11:14:10,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:10,761 INFO L225 Difference]: With dead ends: 70577 [2021-12-15 11:14:10,761 INFO L226 Difference]: Without dead ends: 50524 [2021-12-15 11:14:10,782 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 11:14:10,783 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 153 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:10,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1088 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50524 states. [2021-12-15 11:14:11,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50524 to 50522. [2021-12-15 11:14:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50522 states, 50521 states have (on average 1.605569961006314) internal successors, (81115), 50521 states have internal predecessors, (81115), 0 states have call successors, (0), 0 states 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 11:14:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50522 states to 50522 states and 81115 transitions. [2021-12-15 11:14:11,989 INFO L78 Accepts]: Start accepts. Automaton has 50522 states and 81115 transitions. Word has length 133 [2021-12-15 11:14:11,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:11,990 INFO L470 AbstractCegarLoop]: Abstraction has 50522 states and 81115 transitions. [2021-12-15 11:14:11,990 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 11:14:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 50522 states and 81115 transitions. [2021-12-15 11:14:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-15 11:14:11,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:11,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:11,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:14:11,992 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:11,992 INFO L85 PathProgramCache]: Analyzing trace with hash -2138633752, now seen corresponding path program 1 times [2021-12-15 11:14:11,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:11,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064026684] [2021-12-15 11:14:11,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:11,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:12,046 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 11:14:12,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064026684] [2021-12-15 11:14:12,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064026684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:12,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:12,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:14:12,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144758193] [2021-12-15 11:14:12,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:12,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:14:12,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:14:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:14:12,048 INFO L87 Difference]: Start difference. First operand 50522 states and 81115 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:13,660 INFO L93 Difference]: Finished difference Result 162671 states and 261879 transitions. [2021-12-15 11:14:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:14:13,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-12-15 11:14:13,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:13,972 INFO L225 Difference]: With dead ends: 162671 [2021-12-15 11:14:13,972 INFO L226 Difference]: Without dead ends: 112382 [2021-12-15 11:14:14,056 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 11:14:14,056 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 561 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:14,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 1632 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112382 states. [2021-12-15 11:14:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112382 to 81227. [2021-12-15 11:14:16,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 1.6005835569891413) internal successors, (130009), 81226 states have internal predecessors, (130009), 0 states have call successors, (0), 0 states 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 11:14:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 130009 transitions. [2021-12-15 11:14:16,689 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 130009 transitions. Word has length 134 [2021-12-15 11:14:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:16,690 INFO L470 AbstractCegarLoop]: Abstraction has 81227 states and 130009 transitions. [2021-12-15 11:14:16,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 130009 transitions. [2021-12-15 11:14:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-15 11:14:16,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:16,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:16,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:14:16,692 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:16,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:16,692 INFO L85 PathProgramCache]: Analyzing trace with hash -153851200, now seen corresponding path program 1 times [2021-12-15 11:14:16,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:16,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105094244] [2021-12-15 11:14:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:16,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:16,817 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 11:14:16,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:16,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105094244] [2021-12-15 11:14:16,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105094244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:16,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:16,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:14:16,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118163474] [2021-12-15 11:14:16,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:16,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:14:16,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:16,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:14:16,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:14:16,819 INFO L87 Difference]: Start difference. First operand 81227 states and 130009 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 11:14:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:18,606 INFO L93 Difference]: Finished difference Result 162223 states and 259648 transitions. [2021-12-15 11:14:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:14:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-15 11:14:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:18,783 INFO L225 Difference]: With dead ends: 162223 [2021-12-15 11:14:18,784 INFO L226 Difference]: Without dead ends: 81229 [2021-12-15 11:14:18,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:14:18,862 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 457 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1925 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:18,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 1925 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:18,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81229 states. [2021-12-15 11:14:20,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81229 to 81227. [2021-12-15 11:14:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81227 states, 81226 states have (on average 1.5928889764361165) internal successors, (129384), 81226 states have internal predecessors, (129384), 0 states have call successors, (0), 0 states 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 11:14:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81227 states to 81227 states and 129384 transitions. [2021-12-15 11:14:20,723 INFO L78 Accepts]: Start accepts. Automaton has 81227 states and 129384 transitions. Word has length 136 [2021-12-15 11:14:20,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:20,724 INFO L470 AbstractCegarLoop]: Abstraction has 81227 states and 129384 transitions. [2021-12-15 11:14:20,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 11:14:20,725 INFO L276 IsEmpty]: Start isEmpty. Operand 81227 states and 129384 transitions. [2021-12-15 11:14:20,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-15 11:14:20,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:20,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:20,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:14:20,735 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:20,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1698314093, now seen corresponding path program 1 times [2021-12-15 11:14:20,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:20,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902991425] [2021-12-15 11:14:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:20,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:21,119 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 11:14:21,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:21,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902991425] [2021-12-15 11:14:21,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902991425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:21,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:21,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:14:21,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853075600] [2021-12-15 11:14:21,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:21,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:14:21,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:14:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:14:21,121 INFO L87 Difference]: Start difference. First operand 81227 states and 129384 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:23,774 INFO L93 Difference]: Finished difference Result 237501 states and 378780 transitions. [2021-12-15 11:14:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 11:14:23,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-12-15 11:14:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:24,068 INFO L225 Difference]: With dead ends: 237501 [2021-12-15 11:14:24,068 INFO L226 Difference]: Without dead ends: 156507 [2021-12-15 11:14:24,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:14:24,122 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 756 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:24,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1934 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156507 states. [2021-12-15 11:14:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156507 to 156505. [2021-12-15 11:14:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156505 states, 156504 states have (on average 1.5830202422941266) internal successors, (247749), 156504 states have internal predecessors, (247749), 0 states have call successors, (0), 0 states 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 11:14:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156505 states to 156505 states and 247749 transitions. [2021-12-15 11:14:28,466 INFO L78 Accepts]: Start accepts. Automaton has 156505 states and 247749 transitions. Word has length 139 [2021-12-15 11:14:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:28,467 INFO L470 AbstractCegarLoop]: Abstraction has 156505 states and 247749 transitions. [2021-12-15 11:14:28,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 156505 states and 247749 transitions. [2021-12-15 11:14:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-15 11:14:28,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:28,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:28,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 11:14:28,470 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1539474647, now seen corresponding path program 1 times [2021-12-15 11:14:28,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:28,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868031149] [2021-12-15 11:14:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:28,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:28,620 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 11:14:28,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:28,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868031149] [2021-12-15 11:14:28,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868031149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:28,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:28,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-15 11:14:28,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156922341] [2021-12-15 11:14:28,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:28,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-15 11:14:28,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:28,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-15 11:14:28,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-15 11:14:28,622 INFO L87 Difference]: Start difference. First operand 156505 states and 247749 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:34,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:14:34,582 INFO L93 Difference]: Finished difference Result 302832 states and 475525 transitions. [2021-12-15 11:14:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-15 11:14:34,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-15 11:14:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:14:35,379 INFO L225 Difference]: With dead ends: 302832 [2021-12-15 11:14:35,379 INFO L226 Difference]: Without dead ends: 302830 [2021-12-15 11:14:35,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-15 11:14:35,512 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 1432 mSDsluCounter, 2440 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 3041 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:14:35,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1432 Valid, 3041 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:14:35,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302830 states. [2021-12-15 11:14:40,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302830 to 162313. [2021-12-15 11:14:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162313 states, 162312 states have (on average 1.5619917196510424) internal successors, (253530), 162312 states have internal predecessors, (253530), 0 states have call successors, (0), 0 states 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 11:14:41,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162313 states to 162313 states and 253530 transitions. [2021-12-15 11:14:41,568 INFO L78 Accepts]: Start accepts. Automaton has 162313 states and 253530 transitions. Word has length 140 [2021-12-15 11:14:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:14:41,568 INFO L470 AbstractCegarLoop]: Abstraction has 162313 states and 253530 transitions. [2021-12-15 11:14:41,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:14:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 162313 states and 253530 transitions. [2021-12-15 11:14:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-15 11:14:41,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:14:41,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:14:41,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 11:14:41,576 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:14:41,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:14:41,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1189404419, now seen corresponding path program 1 times [2021-12-15 11:14:41,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:14:41,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450300290] [2021-12-15 11:14:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:14:41,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:14:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:14:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:14:41,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:14:41,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450300290] [2021-12-15 11:14:41,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450300290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:14:41,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:14:41,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-15 11:14:41,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954501743] [2021-12-15 11:14:41,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:14:41,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 11:14:41,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:14:41,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 11:14:41,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-15 11:14:41,645 INFO L87 Difference]: Start difference. First operand 162313 states and 253530 transitions. Second operand has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)