./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.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 f80bfa5d5133b0a22059cd1d412c5ee55e27da1e07175dcd83a431b56441bb30 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:36:09,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:36:09,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:36:09,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:36:09,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:36:09,599 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:36:09,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:36:09,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:36:09,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:36:09,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:36:09,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:36:09,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:36:09,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:36:09,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:36:09,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:36:09,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:36:09,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:36:09,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:36:09,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:36:09,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:36:09,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:36:09,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:36:09,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:36:09,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:36:09,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:36:09,636 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:36:09,636 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:36:09,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:36:09,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:36:09,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:36:09,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:36:09,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:36:09,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:36:09,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:36:09,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:36:09,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:36:09,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:36:09,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:36:09,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:36:09,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:36:09,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:36:09,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:36:09,680 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:36:09,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:36:09,682 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:36:09,682 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:36:09,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:36:09,683 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:36:09,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:36:09,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:36:09,684 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:36:09,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:36:09,685 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:36:09,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:36:09,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:36:09,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:36:09,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:36:09,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:36:09,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:36:09,686 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:36:09,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:36:09,686 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:36:09,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:36:09,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:36:09,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:36:09,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:36:09,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:36:09,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:36:09,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:36:09,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:36:09,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:36:09,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:36:09,688 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:36:09,688 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:36:09,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:36:09,688 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f80bfa5d5133b0a22059cd1d412c5ee55e27da1e07175dcd83a431b56441bb30 [2021-12-28 01:36:09,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:36:09,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:36:09,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:36:09,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:36:09,991 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:36:09,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-12-28 01:36:10,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d67d5e8c1/2a7bc884f903440a8b59a4410f3d7721/FLAG47592b831 [2021-12-28 01:36:10,465 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:36:10,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-12-28 01:36:10,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d67d5e8c1/2a7bc884f903440a8b59a4410f3d7721/FLAG47592b831 [2021-12-28 01:36:10,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d67d5e8c1/2a7bc884f903440a8b59a4410f3d7721 [2021-12-28 01:36:10,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:36:10,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:36:10,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:36:10,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:36:10,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:36:10,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:36:10" (1/1) ... [2021-12-28 01:36:10,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d33a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:10, skipping insertion in model container [2021-12-28 01:36:10,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:36:10" (1/1) ... [2021-12-28 01:36:10,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:36:10,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:36:11,117 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15542,15555] [2021-12-28 01:36:11,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:36:11,218 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:36:11,298 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-reduced/pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c[15542,15555] [2021-12-28 01:36:11,346 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:36:11,359 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:36:11,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11 WrapperNode [2021-12-28 01:36:11,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:36:11,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:36:11,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:36:11,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:36:11,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11" (1/1) ... [2021-12-28 01:36:11,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11" (1/1) ... [2021-12-28 01:36:11,430 INFO L137 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1264 [2021-12-28 01:36:11,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:36:11,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:36:11,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:36:11,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:36:11,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11" (1/1) ... [2021-12-28 01:36:11,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11" (1/1) ... [2021-12-28 01:36:11,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11" (1/1) ... [2021-12-28 01:36:11,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11" (1/1) ... [2021-12-28 01:36:11,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11" (1/1) ... [2021-12-28 01:36:11,482 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11" (1/1) ... [2021-12-28 01:36:11,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11" (1/1) ... [2021-12-28 01:36:11,501 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:36:11,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:36:11,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:36:11,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:36:11,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11" (1/1) ... [2021-12-28 01:36:11,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:36:11,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:36:11,527 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) [2021-12-28 01:36:11,564 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 [2021-12-28 01:36:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:36:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:36:11,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:36:11,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:36:11,698 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:36:11,699 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:36:12,415 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:36:12,427 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:36:12,428 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 01:36:12,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:36:12 BoogieIcfgContainer [2021-12-28 01:36:12,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:36:12,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:36:12,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:36:12,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:36:12,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:36:10" (1/3) ... [2021-12-28 01:36:12,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52caa03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:36:12, skipping insertion in model container [2021-12-28 01:36:12,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:36:11" (2/3) ... [2021-12-28 01:36:12,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52caa03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:36:12, skipping insertion in model container [2021-12-28 01:36:12,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:36:12" (3/3) ... [2021-12-28 01:36:12,437 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.4.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2021-12-28 01:36:12,441 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:36:12,441 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:36:12,483 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:36:12,489 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 [2021-12-28 01:36:12,489 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:36:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 324 states, 322 states have (on average 1.779503105590062) internal successors, (573), 323 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:12,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-28 01:36:12,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:12,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:12,525 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:12,529 INFO L85 PathProgramCache]: Analyzing trace with hash 731422854, now seen corresponding path program 1 times [2021-12-28 01:36:12,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:12,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172129641] [2021-12-28 01:36:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:12,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:12,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:12,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:12,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:12,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172129641] [2021-12-28 01:36:12,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172129641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:12,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:12,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:36:12,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291169260] [2021-12-28 01:36:12,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:12,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:36:12,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:12,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:36:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:36:12,915 INFO L87 Difference]: Start difference. First operand has 324 states, 322 states have (on average 1.779503105590062) internal successors, (573), 323 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:13,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:13,069 INFO L93 Difference]: Finished difference Result 944 states and 1672 transitions. [2021-12-28 01:36:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:36:13,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-12-28 01:36:13,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:13,093 INFO L225 Difference]: With dead ends: 944 [2021-12-28 01:36:13,094 INFO L226 Difference]: Without dead ends: 623 [2021-12-28 01:36:13,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:13,102 INFO L933 BasicCegarLoop]: 882 mSDtfsCounter, 1283 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:13,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1283 Valid, 1412 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-12-28 01:36:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 621. [2021-12-28 01:36:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 1.4580645161290322) internal successors, (904), 620 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 904 transitions. [2021-12-28 01:36:13,187 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 904 transitions. Word has length 150 [2021-12-28 01:36:13,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:13,188 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 904 transitions. [2021-12-28 01:36:13,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:13,188 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 904 transitions. [2021-12-28 01:36:13,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-28 01:36:13,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:13,198 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:13,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:36:13,198 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:13,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1954150630, now seen corresponding path program 1 times [2021-12-28 01:36:13,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:13,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038272759] [2021-12-28 01:36:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:13,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:13,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:13,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038272759] [2021-12-28 01:36:13,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038272759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:13,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:13,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:36:13,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968514962] [2021-12-28 01:36:13,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:13,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:36:13,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:13,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:36:13,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:36:13,296 INFO L87 Difference]: Start difference. First operand 621 states and 904 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:13,372 INFO L93 Difference]: Finished difference Result 1825 states and 2650 transitions. [2021-12-28 01:36:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:36:13,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-12-28 01:36:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:13,377 INFO L225 Difference]: With dead ends: 1825 [2021-12-28 01:36:13,377 INFO L226 Difference]: Without dead ends: 1232 [2021-12-28 01:36:13,378 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 [2021-12-28 01:36:13,379 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 461 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:13,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 1198 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-12-28 01:36:13,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 623. [2021-12-28 01:36:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 1.4565916398713827) internal successors, (906), 622 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 906 transitions. [2021-12-28 01:36:13,407 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 906 transitions. Word has length 151 [2021-12-28 01:36:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:13,408 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 906 transitions. [2021-12-28 01:36:13,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 906 transitions. [2021-12-28 01:36:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-28 01:36:13,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:13,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:13,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:36:13,410 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:13,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:13,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1787410567, now seen corresponding path program 1 times [2021-12-28 01:36:13,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:13,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784577713] [2021-12-28 01:36:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:13,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:13,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:13,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784577713] [2021-12-28 01:36:13,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784577713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:13,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:13,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:36:13,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123209380] [2021-12-28 01:36:13,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:13,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:36:13,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:36:13,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:36:13,581 INFO L87 Difference]: Start difference. First operand 623 states and 906 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:13,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:13,690 INFO L93 Difference]: Finished difference Result 1779 states and 2570 transitions. [2021-12-28 01:36:13,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:36:13,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-12-28 01:36:13,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:13,694 INFO L225 Difference]: With dead ends: 1779 [2021-12-28 01:36:13,694 INFO L226 Difference]: Without dead ends: 1186 [2021-12-28 01:36:13,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:13,700 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 931 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:13,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 1203 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-12-28 01:36:13,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1184. [2021-12-28 01:36:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.433643279797126) internal successors, (1696), 1183 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1696 transitions. [2021-12-28 01:36:13,779 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1696 transitions. Word has length 152 [2021-12-28 01:36:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:13,779 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 1696 transitions. [2021-12-28 01:36:13,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:13,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1696 transitions. [2021-12-28 01:36:13,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-28 01:36:13,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:13,781 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:13,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:36:13,782 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:13,784 INFO L85 PathProgramCache]: Analyzing trace with hash -672172421, now seen corresponding path program 1 times [2021-12-28 01:36:13,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:13,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379274319] [2021-12-28 01:36:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:13,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:13,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:13,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379274319] [2021-12-28 01:36:13,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379274319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:13,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:13,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:36:13,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044043047] [2021-12-28 01:36:13,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:13,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:36:13,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:36:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:36:13,838 INFO L87 Difference]: Start difference. First operand 1184 states and 1696 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:13,971 INFO L93 Difference]: Finished difference Result 3476 states and 4968 transitions. [2021-12-28 01:36:13,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:36:13,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-12-28 01:36:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:13,979 INFO L225 Difference]: With dead ends: 3476 [2021-12-28 01:36:13,979 INFO L226 Difference]: Without dead ends: 2336 [2021-12-28 01:36:13,981 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 [2021-12-28 01:36:13,986 INFO L933 BasicCegarLoop]: 916 mSDtfsCounter, 447 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:13,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 1379 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-12-28 01:36:14,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1188. [2021-12-28 01:36:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 1.4321819713563606) internal successors, (1700), 1187 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 1700 transitions. [2021-12-28 01:36:14,065 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 1700 transitions. Word has length 153 [2021-12-28 01:36:14,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:14,067 INFO L470 AbstractCegarLoop]: Abstraction has 1188 states and 1700 transitions. [2021-12-28 01:36:14,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:14,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 1700 transitions. [2021-12-28 01:36:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-28 01:36:14,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:14,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:14,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:36:14,069 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:14,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:14,070 INFO L85 PathProgramCache]: Analyzing trace with hash 540119633, now seen corresponding path program 1 times [2021-12-28 01:36:14,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:14,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104208344] [2021-12-28 01:36:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:14,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:14,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:14,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:14,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104208344] [2021-12-28 01:36:14,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104208344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:14,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:14,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:36:14,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188263615] [2021-12-28 01:36:14,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:14,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:36:14,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:14,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:36:14,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:36:14,143 INFO L87 Difference]: Start difference. First operand 1188 states and 1700 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:14,263 INFO L93 Difference]: Finished difference Result 3124 states and 4492 transitions. [2021-12-28 01:36:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:36:14,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-12-28 01:36:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:14,269 INFO L225 Difference]: With dead ends: 3124 [2021-12-28 01:36:14,269 INFO L226 Difference]: Without dead ends: 2272 [2021-12-28 01:36:14,271 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 [2021-12-28 01:36:14,271 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 387 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:14,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1304 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-12-28 01:36:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2270. [2021-12-28 01:36:14,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 1.4138386954605553) internal successors, (3208), 2269 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3208 transitions. [2021-12-28 01:36:14,382 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3208 transitions. Word has length 154 [2021-12-28 01:36:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:14,383 INFO L470 AbstractCegarLoop]: Abstraction has 2270 states and 3208 transitions. [2021-12-28 01:36:14,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3208 transitions. [2021-12-28 01:36:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-28 01:36:14,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:14,388 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:14,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:36:14,388 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1047550958, now seen corresponding path program 1 times [2021-12-28 01:36:14,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:14,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108397715] [2021-12-28 01:36:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:14,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:14,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:14,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108397715] [2021-12-28 01:36:14,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108397715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:14,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:14,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:36:14,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601643917] [2021-12-28 01:36:14,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:14,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:36:14,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:36:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:14,490 INFO L87 Difference]: Start difference. First operand 2270 states and 3208 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:14,764 INFO L93 Difference]: Finished difference Result 6318 states and 8929 transitions. [2021-12-28 01:36:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:36:14,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-12-28 01:36:14,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:14,776 INFO L225 Difference]: With dead ends: 6318 [2021-12-28 01:36:14,776 INFO L226 Difference]: Without dead ends: 4085 [2021-12-28 01:36:14,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:14,779 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 1375 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:14,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 1197 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-12-28 01:36:15,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 4083. [2021-12-28 01:36:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4083 states, 4082 states have (on average 1.4017638412542872) internal successors, (5722), 4082 states have internal predecessors, (5722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4083 states to 4083 states and 5722 transitions. [2021-12-28 01:36:15,064 INFO L78 Accepts]: Start accepts. Automaton has 4083 states and 5722 transitions. Word has length 154 [2021-12-28 01:36:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:15,064 INFO L470 AbstractCegarLoop]: Abstraction has 4083 states and 5722 transitions. [2021-12-28 01:36:15,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4083 states and 5722 transitions. [2021-12-28 01:36:15,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-28 01:36:15,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:15,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:15,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:36:15,069 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:15,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1357265656, now seen corresponding path program 1 times [2021-12-28 01:36:15,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:15,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268231117] [2021-12-28 01:36:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:15,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:15,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:15,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268231117] [2021-12-28 01:36:15,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268231117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:15,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:15,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:36:15,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235164017] [2021-12-28 01:36:15,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:15,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:36:15,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:15,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:36:15,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:36:15,155 INFO L87 Difference]: Start difference. First operand 4083 states and 5722 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:15,519 INFO L93 Difference]: Finished difference Result 8434 states and 11732 transitions. [2021-12-28 01:36:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:36:15,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-12-28 01:36:15,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:15,532 INFO L225 Difference]: With dead ends: 8434 [2021-12-28 01:36:15,532 INFO L226 Difference]: Without dead ends: 4468 [2021-12-28 01:36:15,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:15,539 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 924 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:15,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1183 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4468 states. [2021-12-28 01:36:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4468 to 4311. [2021-12-28 01:36:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4311 states, 4310 states have (on average 1.3870069605568445) internal successors, (5978), 4310 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 5978 transitions. [2021-12-28 01:36:15,860 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 5978 transitions. Word has length 154 [2021-12-28 01:36:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:15,860 INFO L470 AbstractCegarLoop]: Abstraction has 4311 states and 5978 transitions. [2021-12-28 01:36:15,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 5978 transitions. [2021-12-28 01:36:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-12-28 01:36:15,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:15,866 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:15,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:36:15,866 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:15,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1903211100, now seen corresponding path program 1 times [2021-12-28 01:36:15,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:15,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499644276] [2021-12-28 01:36:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:15,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:15,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:15,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499644276] [2021-12-28 01:36:15,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499644276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:15,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:15,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:36:15,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335521391] [2021-12-28 01:36:15,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:15,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:36:15,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:15,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:36:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:36:15,898 INFO L87 Difference]: Start difference. First operand 4311 states and 5978 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:16,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:16,378 INFO L93 Difference]: Finished difference Result 12199 states and 16992 transitions. [2021-12-28 01:36:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:36:16,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-12-28 01:36:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:16,402 INFO L225 Difference]: With dead ends: 12199 [2021-12-28 01:36:16,402 INFO L226 Difference]: Without dead ends: 8497 [2021-12-28 01:36:16,407 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 [2021-12-28 01:36:16,408 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 433 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:16,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1057 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8497 states. [2021-12-28 01:36:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8497 to 4327. [2021-12-28 01:36:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4327 states, 4326 states have (on average 1.3855755894590847) internal successors, (5994), 4326 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:16,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 5994 transitions. [2021-12-28 01:36:16,789 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 5994 transitions. Word has length 155 [2021-12-28 01:36:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:16,789 INFO L470 AbstractCegarLoop]: Abstraction has 4327 states and 5994 transitions. [2021-12-28 01:36:16,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 5994 transitions. [2021-12-28 01:36:16,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-28 01:36:16,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:16,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:16,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:36:16,796 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:16,796 INFO L85 PathProgramCache]: Analyzing trace with hash -347339255, now seen corresponding path program 1 times [2021-12-28 01:36:16,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:16,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364782963] [2021-12-28 01:36:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:16,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:16,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:16,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364782963] [2021-12-28 01:36:16,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364782963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:16,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:16,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:36:16,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263716866] [2021-12-28 01:36:16,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:16,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:36:16,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:36:16,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:36:16,869 INFO L87 Difference]: Start difference. First operand 4327 states and 5994 transitions. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:17,171 INFO L93 Difference]: Finished difference Result 8644 states and 11974 transitions. [2021-12-28 01:36:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:36:17,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-12-28 01:36:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:17,192 INFO L225 Difference]: With dead ends: 8644 [2021-12-28 01:36:17,193 INFO L226 Difference]: Without dead ends: 4325 [2021-12-28 01:36:17,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:17,198 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 65 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:17,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1449 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:17,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4325 states. [2021-12-28 01:36:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4325 to 4325. [2021-12-28 01:36:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4325 states, 4324 states have (on average 1.3852913968547642) internal successors, (5990), 4324 states have internal predecessors, (5990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4325 states to 4325 states and 5990 transitions. [2021-12-28 01:36:17,439 INFO L78 Accepts]: Start accepts. Automaton has 4325 states and 5990 transitions. Word has length 156 [2021-12-28 01:36:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:17,440 INFO L470 AbstractCegarLoop]: Abstraction has 4325 states and 5990 transitions. [2021-12-28 01:36:17,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4325 states and 5990 transitions. [2021-12-28 01:36:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-28 01:36:17,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:17,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:17,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:36:17,446 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:17,446 INFO L85 PathProgramCache]: Analyzing trace with hash 681641518, now seen corresponding path program 1 times [2021-12-28 01:36:17,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:17,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493236239] [2021-12-28 01:36:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:17,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:17,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:17,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493236239] [2021-12-28 01:36:17,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493236239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:17,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:17,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:36:17,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074763444] [2021-12-28 01:36:17,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:17,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:36:17,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:36:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:36:17,493 INFO L87 Difference]: Start difference. First operand 4325 states and 5990 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:17,840 INFO L93 Difference]: Finished difference Result 9492 states and 13249 transitions. [2021-12-28 01:36:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:36:17,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-12-28 01:36:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:17,851 INFO L225 Difference]: With dead ends: 9492 [2021-12-28 01:36:17,851 INFO L226 Difference]: Without dead ends: 6394 [2021-12-28 01:36:17,855 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 [2021-12-28 01:36:17,856 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 392 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:17,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 1303 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6394 states. [2021-12-28 01:36:18,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6394 to 6392. [2021-12-28 01:36:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6392 states, 6391 states have (on average 1.3630104834924113) internal successors, (8711), 6391 states have internal predecessors, (8711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6392 states to 6392 states and 8711 transitions. [2021-12-28 01:36:18,252 INFO L78 Accepts]: Start accepts. Automaton has 6392 states and 8711 transitions. Word has length 156 [2021-12-28 01:36:18,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:18,253 INFO L470 AbstractCegarLoop]: Abstraction has 6392 states and 8711 transitions. [2021-12-28 01:36:18,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:18,262 INFO L276 IsEmpty]: Start isEmpty. Operand 6392 states and 8711 transitions. [2021-12-28 01:36:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-28 01:36:18,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:18,269 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:18,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:36:18,269 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:18,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1703352107, now seen corresponding path program 1 times [2021-12-28 01:36:18,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:18,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098482726] [2021-12-28 01:36:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:18,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:18,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:18,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098482726] [2021-12-28 01:36:18,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098482726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:18,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:18,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:36:18,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973927651] [2021-12-28 01:36:18,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:18,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:36:18,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:18,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:36:18,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:36:18,309 INFO L87 Difference]: Start difference. First operand 6392 states and 8711 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:18,884 INFO L93 Difference]: Finished difference Result 13132 states and 18577 transitions. [2021-12-28 01:36:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:36:18,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 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 157 [2021-12-28 01:36:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:18,900 INFO L225 Difference]: With dead ends: 13132 [2021-12-28 01:36:18,900 INFO L226 Difference]: Without dead ends: 7962 [2021-12-28 01:36:18,911 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 [2021-12-28 01:36:18,912 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 225 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:18,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 949 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7962 states. [2021-12-28 01:36:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7962 to 7864. [2021-12-28 01:36:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7864 states, 7863 states have (on average 1.404934503370215) internal successors, (11047), 7863 states have internal predecessors, (11047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:19,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7864 states to 7864 states and 11047 transitions. [2021-12-28 01:36:19,484 INFO L78 Accepts]: Start accepts. Automaton has 7864 states and 11047 transitions. Word has length 157 [2021-12-28 01:36:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:19,485 INFO L470 AbstractCegarLoop]: Abstraction has 7864 states and 11047 transitions. [2021-12-28 01:36:19,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 7864 states and 11047 transitions. [2021-12-28 01:36:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 01:36:19,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:19,492 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:19,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:36:19,492 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:19,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1332410921, now seen corresponding path program 1 times [2021-12-28 01:36:19,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:19,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008607654] [2021-12-28 01:36:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:19,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:19,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:19,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008607654] [2021-12-28 01:36:19,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008607654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:19,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:19,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:36:19,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107431123] [2021-12-28 01:36:19,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:19,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:36:19,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:19,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:36:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:36:19,570 INFO L87 Difference]: Start difference. First operand 7864 states and 11047 transitions. Second operand has 8 states, 8 states have (on average 20.0) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:21,217 INFO L93 Difference]: Finished difference Result 21257 states and 31470 transitions. [2021-12-28 01:36:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 01:36:21,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2021-12-28 01:36:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:21,245 INFO L225 Difference]: With dead ends: 21257 [2021-12-28 01:36:21,245 INFO L226 Difference]: Without dead ends: 15606 [2021-12-28 01:36:21,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:36:21,253 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 5506 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5506 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:21,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5506 Valid, 1180 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:36:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15606 states. [2021-12-28 01:36:22,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15606 to 9376. [2021-12-28 01:36:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9376 states, 9375 states have (on average 1.4113066666666667) internal successors, (13231), 9375 states have internal predecessors, (13231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9376 states to 9376 states and 13231 transitions. [2021-12-28 01:36:22,210 INFO L78 Accepts]: Start accepts. Automaton has 9376 states and 13231 transitions. Word has length 160 [2021-12-28 01:36:22,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:22,211 INFO L470 AbstractCegarLoop]: Abstraction has 9376 states and 13231 transitions. [2021-12-28 01:36:22,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.0) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:22,211 INFO L276 IsEmpty]: Start isEmpty. Operand 9376 states and 13231 transitions. [2021-12-28 01:36:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 01:36:22,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:22,218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:22,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:36:22,218 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash 341763621, now seen corresponding path program 1 times [2021-12-28 01:36:22,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:22,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512947760] [2021-12-28 01:36:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:22,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:22,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:22,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512947760] [2021-12-28 01:36:22,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512947760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:22,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:22,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:36:22,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215549081] [2021-12-28 01:36:22,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:22,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:36:22,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:22,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:36:22,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:36:22,291 INFO L87 Difference]: Start difference. First operand 9376 states and 13231 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:23,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:23,641 INFO L93 Difference]: Finished difference Result 23981 states and 34093 transitions. [2021-12-28 01:36:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:36:23,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2021-12-28 01:36:23,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:23,663 INFO L225 Difference]: With dead ends: 23981 [2021-12-28 01:36:23,664 INFO L226 Difference]: Without dead ends: 14959 [2021-12-28 01:36:23,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:23,676 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 914 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:23,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [914 Valid, 1202 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14959 states. [2021-12-28 01:36:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14959 to 14957. [2021-12-28 01:36:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14957 states, 14956 states have (on average 1.4087991441561916) internal successors, (21070), 14956 states have internal predecessors, (21070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14957 states to 14957 states and 21070 transitions. [2021-12-28 01:36:25,098 INFO L78 Accepts]: Start accepts. Automaton has 14957 states and 21070 transitions. Word has length 160 [2021-12-28 01:36:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:25,098 INFO L470 AbstractCegarLoop]: Abstraction has 14957 states and 21070 transitions. [2021-12-28 01:36:25,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 14957 states and 21070 transitions. [2021-12-28 01:36:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-28 01:36:25,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:25,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:25,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:36:25,109 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:25,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:25,109 INFO L85 PathProgramCache]: Analyzing trace with hash -247303654, now seen corresponding path program 1 times [2021-12-28 01:36:25,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:25,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746253829] [2021-12-28 01:36:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:25,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:25,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:25,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746253829] [2021-12-28 01:36:25,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746253829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:25,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:25,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:36:25,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124324148] [2021-12-28 01:36:25,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:25,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:36:25,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:25,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:36:25,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:36:25,175 INFO L87 Difference]: Start difference. First operand 14957 states and 21070 transitions. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:26,368 INFO L93 Difference]: Finished difference Result 23821 states and 33724 transitions. [2021-12-28 01:36:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:36:26,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2021-12-28 01:36:26,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:26,386 INFO L225 Difference]: With dead ends: 23821 [2021-12-28 01:36:26,387 INFO L226 Difference]: Without dead ends: 12165 [2021-12-28 01:36:26,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:26,399 INFO L933 BasicCegarLoop]: 496 mSDtfsCounter, 53 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:26,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1406 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:26,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12165 states. [2021-12-28 01:36:27,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12165 to 12165. [2021-12-28 01:36:27,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12165 states, 12164 states have (on average 1.4014304505097008) internal successors, (17047), 12164 states have internal predecessors, (17047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12165 states to 12165 states and 17047 transitions. [2021-12-28 01:36:27,692 INFO L78 Accepts]: Start accepts. Automaton has 12165 states and 17047 transitions. Word has length 162 [2021-12-28 01:36:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:27,693 INFO L470 AbstractCegarLoop]: Abstraction has 12165 states and 17047 transitions. [2021-12-28 01:36:27,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 12165 states and 17047 transitions. [2021-12-28 01:36:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-28 01:36:27,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:27,701 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:27,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:36:27,702 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:27,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1747884219, now seen corresponding path program 1 times [2021-12-28 01:36:27,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:27,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429117889] [2021-12-28 01:36:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:27,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:27,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:27,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429117889] [2021-12-28 01:36:27,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429117889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:27,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:27,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:36:27,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33144303] [2021-12-28 01:36:27,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:27,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:36:27,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:27,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:36:27,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:36:27,767 INFO L87 Difference]: Start difference. First operand 12165 states and 17047 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:29,760 INFO L93 Difference]: Finished difference Result 28477 states and 41489 transitions. [2021-12-28 01:36:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:36:29,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-12-28 01:36:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:29,790 INFO L225 Difference]: With dead ends: 28477 [2021-12-28 01:36:29,791 INFO L226 Difference]: Without dead ends: 21507 [2021-12-28 01:36:29,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:36:29,806 INFO L933 BasicCegarLoop]: 466 mSDtfsCounter, 780 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:29,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 884 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:36:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21507 states. [2021-12-28 01:36:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21507 to 21505. [2021-12-28 01:36:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21505 states, 21504 states have (on average 1.422758556547619) internal successors, (30595), 21504 states have internal predecessors, (30595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21505 states to 21505 states and 30595 transitions. [2021-12-28 01:36:31,923 INFO L78 Accepts]: Start accepts. Automaton has 21505 states and 30595 transitions. Word has length 166 [2021-12-28 01:36:31,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:31,923 INFO L470 AbstractCegarLoop]: Abstraction has 21505 states and 30595 transitions. [2021-12-28 01:36:31,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 21505 states and 30595 transitions. [2021-12-28 01:36:31,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-28 01:36:31,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:31,936 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:31,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:36:31,936 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:31,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1264928814, now seen corresponding path program 1 times [2021-12-28 01:36:31,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:31,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020344282] [2021-12-28 01:36:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:31,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:32,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:32,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020344282] [2021-12-28 01:36:32,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020344282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:32,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:32,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:36:32,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221683833] [2021-12-28 01:36:32,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:32,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:36:32,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:36:32,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:36:32,010 INFO L87 Difference]: Start difference. First operand 21505 states and 30595 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:33,702 INFO L93 Difference]: Finished difference Result 36044 states and 51188 transitions. [2021-12-28 01:36:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:36:33,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-12-28 01:36:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:33,722 INFO L225 Difference]: With dead ends: 36044 [2021-12-28 01:36:33,722 INFO L226 Difference]: Without dead ends: 14609 [2021-12-28 01:36:33,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:33,745 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 43 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:33,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1390 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14609 states. [2021-12-28 01:36:35,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14609 to 14609. [2021-12-28 01:36:35,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14609 states, 14608 states have (on average 1.4155941949616648) internal successors, (20679), 14608 states have internal predecessors, (20679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14609 states to 14609 states and 20679 transitions. [2021-12-28 01:36:35,257 INFO L78 Accepts]: Start accepts. Automaton has 14609 states and 20679 transitions. Word has length 166 [2021-12-28 01:36:35,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:35,257 INFO L470 AbstractCegarLoop]: Abstraction has 14609 states and 20679 transitions. [2021-12-28 01:36:35,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:35,258 INFO L276 IsEmpty]: Start isEmpty. Operand 14609 states and 20679 transitions. [2021-12-28 01:36:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 01:36:35,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:35,265 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:35,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:36:35,266 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:35,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:35,266 INFO L85 PathProgramCache]: Analyzing trace with hash -68040980, now seen corresponding path program 1 times [2021-12-28 01:36:35,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:35,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824208594] [2021-12-28 01:36:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:35,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:35,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:35,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824208594] [2021-12-28 01:36:35,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824208594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:35,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:35,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:36:35,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448281974] [2021-12-28 01:36:35,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:35,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:36:35,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:35,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:36:35,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:36:35,304 INFO L87 Difference]: Start difference. First operand 14609 states and 20679 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:37,842 INFO L93 Difference]: Finished difference Result 37738 states and 54497 transitions. [2021-12-28 01:36:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:36:37,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-12-28 01:36:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:37,874 INFO L225 Difference]: With dead ends: 37738 [2021-12-28 01:36:37,874 INFO L226 Difference]: Without dead ends: 24151 [2021-12-28 01:36:37,883 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 [2021-12-28 01:36:37,883 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 290 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:37,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 960 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:37,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24151 states. [2021-12-28 01:36:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24151 to 21851. [2021-12-28 01:36:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21851 states, 21850 states have (on average 1.4584439359267733) internal successors, (31867), 21850 states have internal predecessors, (31867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21851 states to 21851 states and 31867 transitions. [2021-12-28 01:36:40,336 INFO L78 Accepts]: Start accepts. Automaton has 21851 states and 31867 transitions. Word has length 168 [2021-12-28 01:36:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:40,336 INFO L470 AbstractCegarLoop]: Abstraction has 21851 states and 31867 transitions. [2021-12-28 01:36:40,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 21851 states and 31867 transitions. [2021-12-28 01:36:40,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-28 01:36:40,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:40,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:40,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 01:36:40,344 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1403451150, now seen corresponding path program 1 times [2021-12-28 01:36:40,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:40,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8646721] [2021-12-28 01:36:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:40,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:40,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:40,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8646721] [2021-12-28 01:36:40,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8646721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:40,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:40,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:36:40,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144510293] [2021-12-28 01:36:40,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:40,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:36:40,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:40,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:36:40,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:36:40,397 INFO L87 Difference]: Start difference. First operand 21851 states and 31867 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:44,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:44,550 INFO L93 Difference]: Finished difference Result 52906 states and 78194 transitions. [2021-12-28 01:36:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:36:44,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2021-12-28 01:36:44,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:44,603 INFO L225 Difference]: With dead ends: 52906 [2021-12-28 01:36:44,604 INFO L226 Difference]: Without dead ends: 35233 [2021-12-28 01:36:44,622 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 [2021-12-28 01:36:44,623 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 284 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:44,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 933 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35233 states. [2021-12-28 01:36:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35233 to 33091. [2021-12-28 01:36:48,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33091 states, 33090 states have (on average 1.4810818978543367) internal successors, (49009), 33090 states have internal predecessors, (49009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33091 states to 33091 states and 49009 transitions. [2021-12-28 01:36:48,646 INFO L78 Accepts]: Start accepts. Automaton has 33091 states and 49009 transitions. Word has length 171 [2021-12-28 01:36:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:48,646 INFO L470 AbstractCegarLoop]: Abstraction has 33091 states and 49009 transitions. [2021-12-28 01:36:48,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 33091 states and 49009 transitions. [2021-12-28 01:36:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-28 01:36:48,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:48,652 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:48,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 01:36:48,653 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:48,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1362784471, now seen corresponding path program 1 times [2021-12-28 01:36:48,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:48,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864221716] [2021-12-28 01:36:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:48,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:48,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:48,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864221716] [2021-12-28 01:36:48,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864221716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:48,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:48,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:36:48,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970818257] [2021-12-28 01:36:48,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:48,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:36:48,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:36:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:36:48,774 INFO L87 Difference]: Start difference. First operand 33091 states and 49009 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:52,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:36:52,624 INFO L93 Difference]: Finished difference Result 57736 states and 85419 transitions. [2021-12-28 01:36:52,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:36:52,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2021-12-28 01:36:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:36:52,674 INFO L225 Difference]: With dead ends: 57736 [2021-12-28 01:36:52,675 INFO L226 Difference]: Without dead ends: 33081 [2021-12-28 01:36:52,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:52,691 INFO L933 BasicCegarLoop]: 468 mSDtfsCounter, 23 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:36:52,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1360 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:36:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33081 states. [2021-12-28 01:36:56,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33081 to 33081. [2021-12-28 01:36:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33081 states, 33080 states have (on average 1.4810761789600968) internal successors, (48994), 33080 states have internal predecessors, (48994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33081 states to 33081 states and 48994 transitions. [2021-12-28 01:36:56,750 INFO L78 Accepts]: Start accepts. Automaton has 33081 states and 48994 transitions. Word has length 173 [2021-12-28 01:36:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:36:56,750 INFO L470 AbstractCegarLoop]: Abstraction has 33081 states and 48994 transitions. [2021-12-28 01:36:56,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 4 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:36:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 33081 states and 48994 transitions. [2021-12-28 01:36:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-28 01:36:56,756 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:36:56,756 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:36:56,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 01:36:56,757 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:36:56,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:36:56,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1128113098, now seen corresponding path program 1 times [2021-12-28 01:36:56,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:36:56,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112519967] [2021-12-28 01:36:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:36:56,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:36:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:36:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:36:56,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:36:56,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112519967] [2021-12-28 01:36:56,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112519967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:36:56,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:36:56,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:36:56,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196067736] [2021-12-28 01:36:56,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:36:56,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:36:56,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:36:56,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:36:56,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:36:56,872 INFO L87 Difference]: Start difference. First operand 33081 states and 48994 transitions. Second operand has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:37:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:37:00,698 INFO L93 Difference]: Finished difference Result 63182 states and 93572 transitions. [2021-12-28 01:37:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:37:00,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 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 173 [2021-12-28 01:37:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:37:00,744 INFO L225 Difference]: With dead ends: 63182 [2021-12-28 01:37:00,744 INFO L226 Difference]: Without dead ends: 30356 [2021-12-28 01:37:00,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:37:00,771 INFO L933 BasicCegarLoop]: 715 mSDtfsCounter, 813 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:37:00,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 1491 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:37:00,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30356 states. [2021-12-28 01:37:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30356 to 30199. [2021-12-28 01:37:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30199 states, 30198 states have (on average 1.4792370355652693) internal successors, (44670), 30198 states have internal predecessors, (44670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:37:04,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30199 states to 30199 states and 44670 transitions. [2021-12-28 01:37:04,693 INFO L78 Accepts]: Start accepts. Automaton has 30199 states and 44670 transitions. Word has length 173 [2021-12-28 01:37:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:37:04,694 INFO L470 AbstractCegarLoop]: Abstraction has 30199 states and 44670 transitions. [2021-12-28 01:37:04,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.6) internal successors, (173), 5 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:37:04,694 INFO L276 IsEmpty]: Start isEmpty. Operand 30199 states and 44670 transitions. [2021-12-28 01:37:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-28 01:37:04,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:37:04,699 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:37:04,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 01:37:04,699 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:37:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:37:04,700 INFO L85 PathProgramCache]: Analyzing trace with hash -268733951, now seen corresponding path program 1 times [2021-12-28 01:37:04,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:37:04,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334357598] [2021-12-28 01:37:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:37:04,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:37:04,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:37:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:37:04,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:37:04,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334357598] [2021-12-28 01:37:04,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334357598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:37:04,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:37:04,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:37:04,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743585057] [2021-12-28 01:37:04,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:37:04,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:37:04,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:37:04,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:37:04,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:37:04,757 INFO L87 Difference]: Start difference. First operand 30199 states and 44670 transitions. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 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) [2021-12-28 01:37:08,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:37:08,802 INFO L93 Difference]: Finished difference Result 59150 states and 87936 transitions. [2021-12-28 01:37:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:37:08,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 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) Word has length 176 [2021-12-28 01:37:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:37:08,854 INFO L225 Difference]: With dead ends: 59150 [2021-12-28 01:37:08,854 INFO L226 Difference]: Without dead ends: 30199 [2021-12-28 01:37:08,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:37:08,885 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 1145 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:37:08,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 428 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:37:08,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30199 states. [2021-12-28 01:37:12,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30199 to 30199. [2021-12-28 01:37:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30199 states, 30198 states have (on average 1.4673819458242268) internal successors, (44312), 30198 states have internal predecessors, (44312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:37:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30199 states to 30199 states and 44312 transitions. [2021-12-28 01:37:12,931 INFO L78 Accepts]: Start accepts. Automaton has 30199 states and 44312 transitions. Word has length 176 [2021-12-28 01:37:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:37:12,931 INFO L470 AbstractCegarLoop]: Abstraction has 30199 states and 44312 transitions. [2021-12-28 01:37:12,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 4 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) [2021-12-28 01:37:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 30199 states and 44312 transitions. [2021-12-28 01:37:12,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-28 01:37:12,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:37:12,937 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:37:12,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 01:37:12,937 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:37:12,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:37:12,938 INFO L85 PathProgramCache]: Analyzing trace with hash 693497478, now seen corresponding path program 1 times [2021-12-28 01:37:12,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:37:12,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004876807] [2021-12-28 01:37:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:37:12,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:37:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:37:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:37:13,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:37:13,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004876807] [2021-12-28 01:37:13,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004876807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:37:13,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:37:13,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:37:13,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520644331] [2021-12-28 01:37:13,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:37:13,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:37:13,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:37:13,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:37:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:37:13,027 INFO L87 Difference]: Start difference. First operand 30199 states and 44312 transitions. Second operand has 8 states, 8 states have (on average 22.0) internal successors, (176), 7 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)