./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:25:44,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:25:44,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:25:44,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:25:44,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:25:44,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:25:44,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:25:44,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:25:44,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:25:44,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:25:44,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:25:44,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:25:44,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:25:44,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:25:44,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:25:44,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:25:44,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:25:44,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:25:44,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:25:44,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:25:44,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:25:44,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:25:44,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:25:44,443 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:25:44,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:25:44,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:25:44,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:25:44,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:25:44,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:25:44,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:25:44,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:25:44,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:25:44,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:25:44,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:25:44,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:25:44,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:25:44,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:25:44,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:25:44,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:25:44,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:25:44,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:25:44,457 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:25:44,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:25:44,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:25:44,480 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:25:44,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:25:44,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:25:44,481 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:25:44,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:25:44,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:25:44,482 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:25:44,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:25:44,482 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:25:44,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:25:44,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:25:44,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:25:44,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:25:44,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:25:44,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:25:44,483 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:25:44,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:25:44,484 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:25:44,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:25:44,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:25:44,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:25:44,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:25:44,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:25:44,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:25:44,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:25:44,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:25:44,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:25:44,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:25:44,485 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:25:44,485 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:25:44,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:25:44,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:25:44,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5c6d968f3bfd626cfd1fff51fa64657ab37ae457da61332877d0ea5ab7fc90f2 [2021-12-21 13:25:44,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:25:44,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:25:44,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:25:44,695 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:25:44,695 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:25:44,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2021-12-21 13:25:44,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73ed0787f/9b157dbec6744268953b774cf4ce7669/FLAGf9230772e [2021-12-21 13:25:45,198 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:25:45,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2021-12-21 13:25:45,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73ed0787f/9b157dbec6744268953b774cf4ce7669/FLAGf9230772e [2021-12-21 13:25:45,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73ed0787f/9b157dbec6744268953b774cf4ce7669 [2021-12-21 13:25:45,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:25:45,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:25:45,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:25:45,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:25:45,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:25:45,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:25:45" (1/1) ... [2021-12-21 13:25:45,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d8192b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:45, skipping insertion in model container [2021-12-21 13:25:45,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:25:45" (1/1) ... [2021-12-21 13:25:45,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:25:45,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:25:45,907 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2021-12-21 13:25:45,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:25:45,915 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:25:45,993 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c[14698,14711] [2021-12-21 13:25:46,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:25:46,018 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:25:46,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46 WrapperNode [2021-12-21 13:25:46,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:25:46,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:25:46,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:25:46,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:25:46,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46" (1/1) ... [2021-12-21 13:25:46,059 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46" (1/1) ... [2021-12-21 13:25:46,097 INFO L137 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 538 [2021-12-21 13:25:46,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:25:46,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:25:46,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:25:46,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:25:46,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46" (1/1) ... [2021-12-21 13:25:46,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46" (1/1) ... [2021-12-21 13:25:46,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46" (1/1) ... [2021-12-21 13:25:46,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46" (1/1) ... [2021-12-21 13:25:46,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46" (1/1) ... [2021-12-21 13:25:46,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46" (1/1) ... [2021-12-21 13:25:46,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46" (1/1) ... [2021-12-21 13:25:46,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:25:46,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:25:46,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:25:46,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:25:46,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46" (1/1) ... [2021-12-21 13:25:46,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:25:46,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:25:46,175 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) [2021-12-21 13:25:46,183 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 [2021-12-21 13:25:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2021-12-21 13:25:46,210 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2021-12-21 13:25:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:25:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2021-12-21 13:25:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2021-12-21 13:25:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-12-21 13:25:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2021-12-21 13:25:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2021-12-21 13:25:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2021-12-21 13:25:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 13:25:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 13:25:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:25:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2021-12-21 13:25:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2021-12-21 13:25:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:25:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:25:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2021-12-21 13:25:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2021-12-21 13:25:46,338 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:25:46,352 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:25:46,828 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:25:46,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:25:46,835 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 13:25:46,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:25:46 BoogieIcfgContainer [2021-12-21 13:25:46,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:25:46,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:25:46,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:25:46,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:25:46,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:25:45" (1/3) ... [2021-12-21 13:25:46,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f86b959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:25:46, skipping insertion in model container [2021-12-21 13:25:46,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:25:46" (2/3) ... [2021-12-21 13:25:46,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f86b959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:25:46, skipping insertion in model container [2021-12-21 13:25:46,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:25:46" (3/3) ... [2021-12-21 13:25:46,851 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.BOUNDED-10.pals.c [2021-12-21 13:25:46,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:25:46,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:25:46,893 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:25:46,899 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 [2021-12-21 13:25:46,900 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:25:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 167 states have (on average 1.5508982035928143) internal successors, (259), 168 states have internal predecessors, (259), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-21 13:25:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 13:25:46,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:46,943 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] [2021-12-21 13:25:46,944 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash -518679476, now seen corresponding path program 1 times [2021-12-21 13:25:46,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:46,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42011253] [2021-12-21 13:25:46,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:46,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:25:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:25:47,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:47,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42011253] [2021-12-21 13:25:47,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42011253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:47,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:47,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 13:25:47,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003223881] [2021-12-21 13:25:47,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:47,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 13:25:47,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:47,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 13:25:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:25:47,182 INFO L87 Difference]: Start difference. First operand has 207 states, 167 states have (on average 1.5508982035928143) internal successors, (259), 168 states have internal predecessors, (259), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 13:25:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:47,235 INFO L93 Difference]: Finished difference Result 398 states and 642 transitions. [2021-12-21 13:25:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 13:25:47,238 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-12-21 13:25:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:47,248 INFO L225 Difference]: With dead ends: 398 [2021-12-21 13:25:47,248 INFO L226 Difference]: Without dead ends: 203 [2021-12-21 13:25:47,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 13:25:47,256 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:47,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-21 13:25:47,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-12-21 13:25:47,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 164 states have (on average 1.5) internal successors, (246), 164 states have internal predecessors, (246), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-21 13:25:47,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 308 transitions. [2021-12-21 13:25:47,303 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 308 transitions. Word has length 44 [2021-12-21 13:25:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:47,303 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 308 transitions. [2021-12-21 13:25:47,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 13:25:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 308 transitions. [2021-12-21 13:25:47,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 13:25:47,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:47,306 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] [2021-12-21 13:25:47,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:25:47,306 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:47,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:47,307 INFO L85 PathProgramCache]: Analyzing trace with hash -527444980, now seen corresponding path program 1 times [2021-12-21 13:25:47,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:47,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712117046] [2021-12-21 13:25:47,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:47,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:25:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:25:47,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:47,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712117046] [2021-12-21 13:25:47,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712117046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:47,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:47,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:25:47,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421972090] [2021-12-21 13:25:47,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:47,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:25:47,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:47,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:25:47,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:25:47,373 INFO L87 Difference]: Start difference. First operand 203 states and 308 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 13:25:47,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:47,455 INFO L93 Difference]: Finished difference Result 531 states and 811 transitions. [2021-12-21 13:25:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:25:47,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-12-21 13:25:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:47,458 INFO L225 Difference]: With dead ends: 531 [2021-12-21 13:25:47,458 INFO L226 Difference]: Without dead ends: 342 [2021-12-21 13:25:47,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:25:47,459 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 171 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:47,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1586 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-21 13:25:47,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 203. [2021-12-21 13:25:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 164 states have (on average 1.4268292682926829) internal successors, (234), 164 states have internal predecessors, (234), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-21 13:25:47,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 296 transitions. [2021-12-21 13:25:47,474 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 296 transitions. Word has length 44 [2021-12-21 13:25:47,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:47,474 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 296 transitions. [2021-12-21 13:25:47,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 13:25:47,474 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 296 transitions. [2021-12-21 13:25:47,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 13:25:47,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:47,476 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] [2021-12-21 13:25:47,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:25:47,476 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:47,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1202945359, now seen corresponding path program 1 times [2021-12-21 13:25:47,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:47,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180300674] [2021-12-21 13:25:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:47,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:25:47,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:47,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180300674] [2021-12-21 13:25:47,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180300674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:47,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:47,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:47,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052903306] [2021-12-21 13:25:47,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:47,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:47,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:47,577 INFO L87 Difference]: Start difference. First operand 203 states and 296 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 13:25:47,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:47,619 INFO L93 Difference]: Finished difference Result 393 states and 582 transitions. [2021-12-21 13:25:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:47,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-12-21 13:25:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:47,621 INFO L225 Difference]: With dead ends: 393 [2021-12-21 13:25:47,621 INFO L226 Difference]: Without dead ends: 207 [2021-12-21 13:25:47,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:47,623 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 5 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:47,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 860 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-12-21 13:25:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-12-21 13:25:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 167 states have (on average 1.4191616766467066) internal successors, (237), 167 states have internal predecessors, (237), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-21 13:25:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 299 transitions. [2021-12-21 13:25:47,634 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 299 transitions. Word has length 55 [2021-12-21 13:25:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:47,634 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 299 transitions. [2021-12-21 13:25:47,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 13:25:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 299 transitions. [2021-12-21 13:25:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 13:25:47,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:47,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:47,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:25:47,636 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:47,637 INFO L85 PathProgramCache]: Analyzing trace with hash -915994749, now seen corresponding path program 1 times [2021-12-21 13:25:47,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:47,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155860008] [2021-12-21 13:25:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:47,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 13:25:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:47,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:47,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155860008] [2021-12-21 13:25:47,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155860008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:47,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:47,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:47,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150627111] [2021-12-21 13:25:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:47,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:47,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:47,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:47,721 INFO L87 Difference]: Start difference. First operand 207 states and 299 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:47,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:47,745 INFO L93 Difference]: Finished difference Result 564 states and 826 transitions. [2021-12-21 13:25:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:47,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 71 [2021-12-21 13:25:47,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:47,748 INFO L225 Difference]: With dead ends: 564 [2021-12-21 13:25:47,748 INFO L226 Difference]: Without dead ends: 374 [2021-12-21 13:25:47,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:47,750 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 227 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:47,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 622 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-12-21 13:25:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 364. [2021-12-21 13:25:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 287 states have (on average 1.4390243902439024) internal successors, (413), 288 states have internal predecessors, (413), 60 states have call successors, (60), 16 states have call predecessors, (60), 16 states have return successors, (60), 59 states have call predecessors, (60), 60 states have call successors, (60) [2021-12-21 13:25:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 533 transitions. [2021-12-21 13:25:47,771 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 533 transitions. Word has length 71 [2021-12-21 13:25:47,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:47,771 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 533 transitions. [2021-12-21 13:25:47,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 533 transitions. [2021-12-21 13:25:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 13:25:47,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:47,773 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:47,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 13:25:47,774 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1756914315, now seen corresponding path program 1 times [2021-12-21 13:25:47,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:47,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994545022] [2021-12-21 13:25:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:47,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 13:25:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:47,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:47,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994545022] [2021-12-21 13:25:47,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994545022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:47,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:47,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:47,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217271273] [2021-12-21 13:25:47,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:47,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:47,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:47,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:47,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:47,836 INFO L87 Difference]: Start difference. First operand 364 states and 533 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:47,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:47,883 INFO L93 Difference]: Finished difference Result 1009 states and 1492 transitions. [2021-12-21 13:25:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:47,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2021-12-21 13:25:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:47,888 INFO L225 Difference]: With dead ends: 1009 [2021-12-21 13:25:47,888 INFO L226 Difference]: Without dead ends: 662 [2021-12-21 13:25:47,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:47,890 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 235 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:47,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 657 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:47,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-21 13:25:47,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 645. [2021-12-21 13:25:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 496 states have (on average 1.4576612903225807) internal successors, (723), 499 states have internal predecessors, (723), 117 states have call successors, (117), 31 states have call predecessors, (117), 31 states have return successors, (117), 114 states have call predecessors, (117), 117 states have call successors, (117) [2021-12-21 13:25:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 957 transitions. [2021-12-21 13:25:47,918 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 957 transitions. Word has length 72 [2021-12-21 13:25:47,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:47,919 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 957 transitions. [2021-12-21 13:25:47,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:47,919 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 957 transitions. [2021-12-21 13:25:47,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 13:25:47,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:47,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:47,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:25:47,921 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:47,921 INFO L85 PathProgramCache]: Analyzing trace with hash 477050637, now seen corresponding path program 1 times [2021-12-21 13:25:47,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:47,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128913449] [2021-12-21 13:25:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:47,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 13:25:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:47,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128913449] [2021-12-21 13:25:47,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128913449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:47,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:47,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:25:47,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118566485] [2021-12-21 13:25:47,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:47,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:25:47,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:25:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:47,997 INFO L87 Difference]: Start difference. First operand 645 states and 957 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:48,269 INFO L93 Difference]: Finished difference Result 1805 states and 2723 transitions. [2021-12-21 13:25:48,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:25:48,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2021-12-21 13:25:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:48,274 INFO L225 Difference]: With dead ends: 1805 [2021-12-21 13:25:48,275 INFO L226 Difference]: Without dead ends: 1177 [2021-12-21 13:25:48,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:25:48,277 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 786 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:48,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 778 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:25:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-12-21 13:25:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 770. [2021-12-21 13:25:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 608 states have (on average 1.4358552631578947) internal successors, (873), 611 states have internal predecessors, (873), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1121 transitions. [2021-12-21 13:25:48,327 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1121 transitions. Word has length 72 [2021-12-21 13:25:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:48,327 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1121 transitions. [2021-12-21 13:25:48,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1121 transitions. [2021-12-21 13:25:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 13:25:48,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:48,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:48,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:25:48,329 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:48,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:48,330 INFO L85 PathProgramCache]: Analyzing trace with hash -221882142, now seen corresponding path program 1 times [2021-12-21 13:25:48,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:48,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601749454] [2021-12-21 13:25:48,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:48,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-21 13:25:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:48,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:48,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601749454] [2021-12-21 13:25:48,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601749454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:48,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:48,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:25:48,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171917267] [2021-12-21 13:25:48,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:48,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:25:48,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:48,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:25:48,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:48,440 INFO L87 Difference]: Start difference. First operand 770 states and 1121 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:48,707 INFO L93 Difference]: Finished difference Result 1809 states and 2723 transitions. [2021-12-21 13:25:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 13:25:48,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 73 [2021-12-21 13:25:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:48,714 INFO L225 Difference]: With dead ends: 1809 [2021-12-21 13:25:48,714 INFO L226 Difference]: Without dead ends: 1181 [2021-12-21 13:25:48,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:25:48,718 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 783 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:48,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 780 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:25:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-12-21 13:25:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 778. [2021-12-21 13:25:48,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 616 states have (on average 1.4301948051948052) internal successors, (881), 619 states have internal predecessors, (881), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:48,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1129 transitions. [2021-12-21 13:25:48,781 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1129 transitions. Word has length 73 [2021-12-21 13:25:48,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:48,783 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1129 transitions. [2021-12-21 13:25:48,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1129 transitions. [2021-12-21 13:25:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 13:25:48,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:48,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:48,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:25:48,789 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1379275244, now seen corresponding path program 1 times [2021-12-21 13:25:48,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:48,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318182262] [2021-12-21 13:25:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:48,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 13:25:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:48,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:48,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318182262] [2021-12-21 13:25:48,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318182262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:48,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:48,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:48,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851844396] [2021-12-21 13:25:48,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:48,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:48,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:48,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:48,895 INFO L87 Difference]: Start difference. First operand 778 states and 1129 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:49,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:49,162 INFO L93 Difference]: Finished difference Result 1809 states and 2715 transitions. [2021-12-21 13:25:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:49,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 75 [2021-12-21 13:25:49,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:49,168 INFO L225 Difference]: With dead ends: 1809 [2021-12-21 13:25:49,168 INFO L226 Difference]: Without dead ends: 1181 [2021-12-21 13:25:49,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:49,172 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 238 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:49,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 747 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:25:49,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-12-21 13:25:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 778. [2021-12-21 13:25:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 616 states have (on average 1.4237012987012987) internal successors, (877), 619 states have internal predecessors, (877), 124 states have call successors, (124), 37 states have call predecessors, (124), 37 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:49,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1125 transitions. [2021-12-21 13:25:49,231 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1125 transitions. Word has length 75 [2021-12-21 13:25:49,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:49,233 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1125 transitions. [2021-12-21 13:25:49,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 13:25:49,233 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1125 transitions. [2021-12-21 13:25:49,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 13:25:49,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:49,234 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:49,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:25:49,235 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:49,235 INFO L85 PathProgramCache]: Analyzing trace with hash -156149797, now seen corresponding path program 1 times [2021-12-21 13:25:49,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:49,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943985587] [2021-12-21 13:25:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:49,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:49,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:49,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943985587] [2021-12-21 13:25:49,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943985587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:49,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:49,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:49,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235277447] [2021-12-21 13:25:49,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:49,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:49,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:49,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:49,321 INFO L87 Difference]: Start difference. First operand 778 states and 1125 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 13:25:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:49,373 INFO L93 Difference]: Finished difference Result 1426 states and 2092 transitions. [2021-12-21 13:25:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:49,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 76 [2021-12-21 13:25:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:49,376 INFO L225 Difference]: With dead ends: 1426 [2021-12-21 13:25:49,376 INFO L226 Difference]: Without dead ends: 798 [2021-12-21 13:25:49,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:49,379 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 6 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:49,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 872 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-12-21 13:25:49,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 798. [2021-12-21 13:25:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 632 states have (on average 1.4129746835443038) internal successors, (893), 635 states have internal predecessors, (893), 124 states have call successors, (124), 41 states have call predecessors, (124), 41 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1141 transitions. [2021-12-21 13:25:49,421 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1141 transitions. Word has length 76 [2021-12-21 13:25:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:49,422 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1141 transitions. [2021-12-21 13:25:49,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 13:25:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1141 transitions. [2021-12-21 13:25:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 13:25:49,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:49,423 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:49,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:25:49,423 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:49,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1992242591, now seen corresponding path program 1 times [2021-12-21 13:25:49,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:49,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501143249] [2021-12-21 13:25:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:49,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:49,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:49,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501143249] [2021-12-21 13:25:49,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501143249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:49,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:49,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:49,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932678486] [2021-12-21 13:25:49,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:49,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:49,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:49,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:49,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:49,483 INFO L87 Difference]: Start difference. First operand 798 states and 1141 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 13:25:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:49,552 INFO L93 Difference]: Finished difference Result 1466 states and 2136 transitions. [2021-12-21 13:25:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:49,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 84 [2021-12-21 13:25:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:49,556 INFO L225 Difference]: With dead ends: 1466 [2021-12-21 13:25:49,556 INFO L226 Difference]: Without dead ends: 818 [2021-12-21 13:25:49,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:49,558 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 6 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:49,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 858 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-12-21 13:25:49,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 818. [2021-12-21 13:25:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 648 states have (on average 1.4027777777777777) internal successors, (909), 651 states have internal predecessors, (909), 124 states have call successors, (124), 45 states have call predecessors, (124), 45 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1157 transitions. [2021-12-21 13:25:49,598 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1157 transitions. Word has length 84 [2021-12-21 13:25:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:49,599 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1157 transitions. [2021-12-21 13:25:49,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 13:25:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1157 transitions. [2021-12-21 13:25:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:25:49,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:49,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:49,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:25:49,600 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:49,601 INFO L85 PathProgramCache]: Analyzing trace with hash -115565173, now seen corresponding path program 1 times [2021-12-21 13:25:49,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:49,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413312248] [2021-12-21 13:25:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:49,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:49,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:49,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413312248] [2021-12-21 13:25:49,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413312248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:49,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:49,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:49,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088228663] [2021-12-21 13:25:49,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:49,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:49,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:49,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:49,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:49,656 INFO L87 Difference]: Start difference. First operand 818 states and 1157 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 13:25:49,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:49,708 INFO L93 Difference]: Finished difference Result 1502 states and 2152 transitions. [2021-12-21 13:25:49,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:49,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 92 [2021-12-21 13:25:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:49,712 INFO L225 Difference]: With dead ends: 1502 [2021-12-21 13:25:49,712 INFO L226 Difference]: Without dead ends: 834 [2021-12-21 13:25:49,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:49,714 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 5 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:49,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 867 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-12-21 13:25:49,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2021-12-21 13:25:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 660 states have (on average 1.3954545454545455) internal successors, (921), 663 states have internal predecessors, (921), 124 states have call successors, (124), 49 states have call predecessors, (124), 49 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1169 transitions. [2021-12-21 13:25:49,751 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1169 transitions. Word has length 92 [2021-12-21 13:25:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:49,751 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1169 transitions. [2021-12-21 13:25:49,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 13:25:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1169 transitions. [2021-12-21 13:25:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-21 13:25:49,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:49,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:49,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:25:49,753 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:49,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:49,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2014073166, now seen corresponding path program 1 times [2021-12-21 13:25:49,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:49,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726348206] [2021-12-21 13:25:49,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:49,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:25:49,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:49,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726348206] [2021-12-21 13:25:49,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726348206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:49,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:49,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:49,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061887797] [2021-12-21 13:25:49,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:49,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:49,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:49,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:49,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:49,876 INFO L87 Difference]: Start difference. First operand 834 states and 1169 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 13:25:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:49,941 INFO L93 Difference]: Finished difference Result 1538 states and 2192 transitions. [2021-12-21 13:25:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:49,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 92 [2021-12-21 13:25:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:49,945 INFO L225 Difference]: With dead ends: 1538 [2021-12-21 13:25:49,945 INFO L226 Difference]: Without dead ends: 854 [2021-12-21 13:25:49,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:49,947 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 6 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:49,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 858 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-12-21 13:25:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 854. [2021-12-21 13:25:49,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 676 states have (on average 1.386094674556213) internal successors, (937), 679 states have internal predecessors, (937), 124 states have call successors, (124), 53 states have call predecessors, (124), 53 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:49,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1185 transitions. [2021-12-21 13:25:49,985 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1185 transitions. Word has length 92 [2021-12-21 13:25:49,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:49,985 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1185 transitions. [2021-12-21 13:25:49,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 13:25:49,985 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1185 transitions. [2021-12-21 13:25:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-21 13:25:49,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:49,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:49,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:25:49,989 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:49,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash -794519374, now seen corresponding path program 1 times [2021-12-21 13:25:49,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:49,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526183883] [2021-12-21 13:25:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:49,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:25:50,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:50,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526183883] [2021-12-21 13:25:50,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526183883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:50,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:50,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:50,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617754711] [2021-12-21 13:25:50,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:50,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:50,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:50,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:50,062 INFO L87 Difference]: Start difference. First operand 854 states and 1185 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 13:25:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:50,112 INFO L93 Difference]: Finished difference Result 1582 states and 2220 transitions. [2021-12-21 13:25:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:50,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 100 [2021-12-21 13:25:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:50,115 INFO L225 Difference]: With dead ends: 1582 [2021-12-21 13:25:50,116 INFO L226 Difference]: Without dead ends: 878 [2021-12-21 13:25:50,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:50,117 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 7 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:50,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 869 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-12-21 13:25:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2021-12-21 13:25:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 696 states have (on average 1.375) internal successors, (957), 699 states have internal predecessors, (957), 124 states have call successors, (124), 57 states have call predecessors, (124), 57 states have return successors, (124), 121 states have call predecessors, (124), 124 states have call successors, (124) [2021-12-21 13:25:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1205 transitions. [2021-12-21 13:25:50,171 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1205 transitions. Word has length 100 [2021-12-21 13:25:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:50,171 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1205 transitions. [2021-12-21 13:25:50,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 13:25:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1205 transitions. [2021-12-21 13:25:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 13:25:50,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:50,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:50,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:25:50,173 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1401758325, now seen corresponding path program 1 times [2021-12-21 13:25:50,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:50,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231680528] [2021-12-21 13:25:50,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:50,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:50,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:25:50,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:50,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231680528] [2021-12-21 13:25:50,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231680528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:50,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:50,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:50,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409926399] [2021-12-21 13:25:50,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:50,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:50,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:50,272 INFO L87 Difference]: Start difference. First operand 878 states and 1205 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 13:25:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:50,487 INFO L93 Difference]: Finished difference Result 2499 states and 3487 transitions. [2021-12-21 13:25:50,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:25:50,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 103 [2021-12-21 13:25:50,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:50,493 INFO L225 Difference]: With dead ends: 2499 [2021-12-21 13:25:50,493 INFO L226 Difference]: Without dead ends: 1771 [2021-12-21 13:25:50,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:25:50,495 INFO L933 BasicCegarLoop]: 419 mSDtfsCounter, 395 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:50,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 2312 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:50,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-12-21 13:25:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1162. [2021-12-21 13:25:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 907 states have (on average 1.3660418963616316) internal successors, (1239), 912 states have internal predecessors, (1239), 172 states have call successors, (172), 82 states have call predecessors, (172), 82 states have return successors, (172), 167 states have call predecessors, (172), 172 states have call successors, (172) [2021-12-21 13:25:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1583 transitions. [2021-12-21 13:25:50,572 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1583 transitions. Word has length 103 [2021-12-21 13:25:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:50,573 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1583 transitions. [2021-12-21 13:25:50,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 6 states have internal predecessors, (82), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 13:25:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1583 transitions. [2021-12-21 13:25:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-21 13:25:50,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:50,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:50,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:25:50,574 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:50,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:50,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1324741963, now seen corresponding path program 1 times [2021-12-21 13:25:50,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:50,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808393493] [2021-12-21 13:25:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:50,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:50,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:25:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:25:50,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:50,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808393493] [2021-12-21 13:25:50,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808393493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:50,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:50,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:50,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144104046] [2021-12-21 13:25:50,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:50,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:50,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:50,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:50,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:50,632 INFO L87 Difference]: Start difference. First operand 1162 states and 1583 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 13:25:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:50,692 INFO L93 Difference]: Finished difference Result 2130 states and 2928 transitions. [2021-12-21 13:25:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:25:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 107 [2021-12-21 13:25:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:50,696 INFO L225 Difference]: With dead ends: 2130 [2021-12-21 13:25:50,696 INFO L226 Difference]: Without dead ends: 1186 [2021-12-21 13:25:50,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:50,698 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 5 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:50,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 867 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-12-21 13:25:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1186. [2021-12-21 13:25:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 925 states have (on average 1.358918918918919) internal successors, (1257), 930 states have internal predecessors, (1257), 172 states have call successors, (172), 88 states have call predecessors, (172), 88 states have return successors, (172), 167 states have call predecessors, (172), 172 states have call successors, (172) [2021-12-21 13:25:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1601 transitions. [2021-12-21 13:25:50,747 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1601 transitions. Word has length 107 [2021-12-21 13:25:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:50,748 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 1601 transitions. [2021-12-21 13:25:50,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 13:25:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1601 transitions. [2021-12-21 13:25:50,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 13:25:50,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:50,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:50,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:25:50,749 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:50,750 INFO L85 PathProgramCache]: Analyzing trace with hash 682815691, now seen corresponding path program 1 times [2021-12-21 13:25:50,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:50,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105822409] [2021-12-21 13:25:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:50,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 13:25:50,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:50,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105822409] [2021-12-21 13:25:50,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105822409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:50,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:50,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:25:50,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527170889] [2021-12-21 13:25:50,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:50,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:25:50,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:50,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:25:50,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:25:50,829 INFO L87 Difference]: Start difference. First operand 1186 states and 1601 transitions. Second operand has 6 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 13:25:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:50,933 INFO L93 Difference]: Finished difference Result 1659 states and 2347 transitions. [2021-12-21 13:25:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:25:50,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 106 [2021-12-21 13:25:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:50,939 INFO L225 Difference]: With dead ends: 1659 [2021-12-21 13:25:50,939 INFO L226 Difference]: Without dead ends: 1657 [2021-12-21 13:25:50,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:25:50,940 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 263 mSDsluCounter, 1746 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:50,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 2263 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-12-21 13:25:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1194. [2021-12-21 13:25:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 929 states have (on average 1.3573735199138859) internal successors, (1261), 936 states have internal predecessors, (1261), 174 states have call successors, (174), 90 states have call predecessors, (174), 90 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2021-12-21 13:25:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1609 transitions. [2021-12-21 13:25:50,999 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1609 transitions. Word has length 106 [2021-12-21 13:25:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:50,999 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 1609 transitions. [2021-12-21 13:25:50,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 13:25:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1609 transitions. [2021-12-21 13:25:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 13:25:51,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:51,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:51,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:25:51,001 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:51,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:51,001 INFO L85 PathProgramCache]: Analyzing trace with hash -614162587, now seen corresponding path program 1 times [2021-12-21 13:25:51,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:51,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141783852] [2021-12-21 13:25:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:51,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 13:25:51,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:51,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141783852] [2021-12-21 13:25:51,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141783852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:51,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:51,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:51,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043982277] [2021-12-21 13:25:51,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:51,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:51,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:51,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:51,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:51,078 INFO L87 Difference]: Start difference. First operand 1194 states and 1609 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 13:25:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:51,252 INFO L93 Difference]: Finished difference Result 2456 states and 3370 transitions. [2021-12-21 13:25:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:25:51,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2021-12-21 13:25:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:51,258 INFO L225 Difference]: With dead ends: 2456 [2021-12-21 13:25:51,258 INFO L226 Difference]: Without dead ends: 1562 [2021-12-21 13:25:51,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:25:51,260 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 527 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 2275 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:51,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 2275 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-12-21 13:25:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1240. [2021-12-21 13:25:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 986 states have (on average 1.3468559837728196) internal successors, (1328), 998 states have internal predecessors, (1328), 162 states have call successors, (162), 91 states have call predecessors, (162), 91 states have return successors, (162), 150 states have call predecessors, (162), 162 states have call successors, (162) [2021-12-21 13:25:51,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1652 transitions. [2021-12-21 13:25:51,322 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1652 transitions. Word has length 109 [2021-12-21 13:25:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:51,323 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1652 transitions. [2021-12-21 13:25:51,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 13:25:51,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1652 transitions. [2021-12-21 13:25:51,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:25:51,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:51,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:51,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 13:25:51,324 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:51,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:51,325 INFO L85 PathProgramCache]: Analyzing trace with hash 326540891, now seen corresponding path program 1 times [2021-12-21 13:25:51,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:51,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395107155] [2021-12-21 13:25:51,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:51,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:25:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 13:25:51,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:51,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395107155] [2021-12-21 13:25:51,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395107155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:51,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:51,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:51,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900080502] [2021-12-21 13:25:51,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:51,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:51,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:51,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:51,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:51,420 INFO L87 Difference]: Start difference. First operand 1240 states and 1652 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 13:25:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:51,593 INFO L93 Difference]: Finished difference Result 2550 states and 3481 transitions. [2021-12-21 13:25:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:25:51,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 111 [2021-12-21 13:25:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:51,598 INFO L225 Difference]: With dead ends: 2550 [2021-12-21 13:25:51,598 INFO L226 Difference]: Without dead ends: 1590 [2021-12-21 13:25:51,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:25:51,600 INFO L933 BasicCegarLoop]: 442 mSDtfsCounter, 399 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 2425 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:51,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 2425 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:51,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-12-21 13:25:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1126. [2021-12-21 13:25:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 899 states have (on average 1.3481646273637375) internal successors, (1212), 909 states have internal predecessors, (1212), 145 states have call successors, (145), 81 states have call predecessors, (145), 81 states have return successors, (145), 135 states have call predecessors, (145), 145 states have call successors, (145) [2021-12-21 13:25:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1502 transitions. [2021-12-21 13:25:51,661 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1502 transitions. Word has length 111 [2021-12-21 13:25:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:51,661 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1502 transitions. [2021-12-21 13:25:51,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 6 states have internal predecessors, (84), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 13:25:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1502 transitions. [2021-12-21 13:25:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 13:25:51,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:51,662 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:51,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 13:25:51,663 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:51,663 INFO L85 PathProgramCache]: Analyzing trace with hash 2059853897, now seen corresponding path program 1 times [2021-12-21 13:25:51,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:51,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340146313] [2021-12-21 13:25:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:51,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:25:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:25:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 13:25:51,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:51,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340146313] [2021-12-21 13:25:51,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340146313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:51,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:51,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:25:51,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209798977] [2021-12-21 13:25:51,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:51,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:25:51,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:25:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:25:51,771 INFO L87 Difference]: Start difference. First operand 1126 states and 1502 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-21 13:25:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:52,261 INFO L93 Difference]: Finished difference Result 2621 states and 3588 transitions. [2021-12-21 13:25:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:25:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 112 [2021-12-21 13:25:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:52,267 INFO L225 Difference]: With dead ends: 2621 [2021-12-21 13:25:52,267 INFO L226 Difference]: Without dead ends: 1695 [2021-12-21 13:25:52,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:25:52,269 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 930 mSDsluCounter, 1656 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 2165 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:52,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 2165 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:25:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2021-12-21 13:25:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 1142. [2021-12-21 13:25:52,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 907 states have (on average 1.328555678059537) internal successors, (1205), 918 states have internal predecessors, (1205), 148 states have call successors, (148), 86 states have call predecessors, (148), 86 states have return successors, (148), 137 states have call predecessors, (148), 148 states have call successors, (148) [2021-12-21 13:25:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1501 transitions. [2021-12-21 13:25:52,358 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1501 transitions. Word has length 112 [2021-12-21 13:25:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:52,358 INFO L470 AbstractCegarLoop]: Abstraction has 1142 states and 1501 transitions. [2021-12-21 13:25:52,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 7 states have internal predecessors, (89), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-21 13:25:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1501 transitions. [2021-12-21 13:25:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 13:25:52,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:52,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:52,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 13:25:52,360 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:52,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:52,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1941201166, now seen corresponding path program 1 times [2021-12-21 13:25:52,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:52,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545307841] [2021-12-21 13:25:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:52,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:25:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:25:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:52,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:52,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545307841] [2021-12-21 13:25:52,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545307841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:52,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:52,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:52,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036506630] [2021-12-21 13:25:52,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:52,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:52,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:52,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:52,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:52,405 INFO L87 Difference]: Start difference. First operand 1142 states and 1501 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:52,657 INFO L93 Difference]: Finished difference Result 3187 states and 4275 transitions. [2021-12-21 13:25:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:52,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 112 [2021-12-21 13:25:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:52,664 INFO L225 Difference]: With dead ends: 3187 [2021-12-21 13:25:52,664 INFO L226 Difference]: Without dead ends: 2296 [2021-12-21 13:25:52,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:52,666 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 440 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:52,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 1227 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-12-21 13:25:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1939. [2021-12-21 13:25:52,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1514 states have (on average 1.3262879788639366) internal successors, (2008), 1533 states have internal predecessors, (2008), 272 states have call successors, (272), 152 states have call predecessors, (272), 152 states have return successors, (272), 253 states have call predecessors, (272), 272 states have call successors, (272) [2021-12-21 13:25:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 2552 transitions. [2021-12-21 13:25:52,796 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 2552 transitions. Word has length 112 [2021-12-21 13:25:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:52,797 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 2552 transitions. [2021-12-21 13:25:52,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 2552 transitions. [2021-12-21 13:25:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-21 13:25:52,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:52,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:52,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 13:25:52,798 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:52,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:52,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2103041469, now seen corresponding path program 1 times [2021-12-21 13:25:52,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:52,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133332842] [2021-12-21 13:25:52,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:52,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:25:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 13:25:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 13:25:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 13:25:52,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:52,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133332842] [2021-12-21 13:25:52,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133332842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:52,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:52,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:25:52,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942559352] [2021-12-21 13:25:52,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:52,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:25:52,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:52,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:25:52,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:25:52,883 INFO L87 Difference]: Start difference. First operand 1939 states and 2552 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:53,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:53,486 INFO L93 Difference]: Finished difference Result 4400 states and 5932 transitions. [2021-12-21 13:25:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:25:53,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 114 [2021-12-21 13:25:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:53,495 INFO L225 Difference]: With dead ends: 4400 [2021-12-21 13:25:53,495 INFO L226 Difference]: Without dead ends: 2810 [2021-12-21 13:25:53,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:25:53,499 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 806 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 2518 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:53,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 2518 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:25:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2021-12-21 13:25:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 1958. [2021-12-21 13:25:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1520 states have (on average 1.3223684210526316) internal successors, (2010), 1540 states have internal predecessors, (2010), 280 states have call successors, (280), 157 states have call predecessors, (280), 157 states have return successors, (280), 260 states have call predecessors, (280), 280 states have call successors, (280) [2021-12-21 13:25:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 2570 transitions. [2021-12-21 13:25:53,689 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 2570 transitions. Word has length 114 [2021-12-21 13:25:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:53,689 INFO L470 AbstractCegarLoop]: Abstraction has 1958 states and 2570 transitions. [2021-12-21 13:25:53,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:53,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 2570 transitions. [2021-12-21 13:25:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-21 13:25:53,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:53,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:53,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 13:25:53,692 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:53,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash 985009634, now seen corresponding path program 1 times [2021-12-21 13:25:53,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:53,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695909831] [2021-12-21 13:25:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:53,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:53,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:53,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 13:25:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:53,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:25:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:53,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:25:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:53,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:25:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:53,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:25:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:53,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:53,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:25:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:53,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:53,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695909831] [2021-12-21 13:25:53,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695909831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:53,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:53,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:53,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733132408] [2021-12-21 13:25:53,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:53,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:53,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:53,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:53,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:53,753 INFO L87 Difference]: Start difference. First operand 1958 states and 2570 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:54,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:54,085 INFO L93 Difference]: Finished difference Result 5168 states and 6863 transitions. [2021-12-21 13:25:54,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:54,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-12-21 13:25:54,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:54,109 INFO L225 Difference]: With dead ends: 5168 [2021-12-21 13:25:54,110 INFO L226 Difference]: Without dead ends: 3594 [2021-12-21 13:25:54,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:54,114 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 487 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:54,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1291 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3594 states. [2021-12-21 13:25:54,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3594 to 3019. [2021-12-21 13:25:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 2306 states have (on average 1.318733738074588) internal successors, (3041), 2337 states have internal predecessors, (3041), 460 states have call successors, (460), 252 states have call predecessors, (460), 252 states have return successors, (460), 429 states have call predecessors, (460), 460 states have call successors, (460) [2021-12-21 13:25:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 3961 transitions. [2021-12-21 13:25:54,366 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 3961 transitions. Word has length 115 [2021-12-21 13:25:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:54,367 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 3961 transitions. [2021-12-21 13:25:54,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 3961 transitions. [2021-12-21 13:25:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-21 13:25:54,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:54,369 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:54,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 13:25:54,370 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:54,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1237817774, now seen corresponding path program 1 times [2021-12-21 13:25:54,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:54,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339055675] [2021-12-21 13:25:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:54,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:54,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:54,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 13:25:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:54,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:54,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 13:25:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:54,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 13:25:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:54,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 13:25:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:54,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 13:25:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:54,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 13:25:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:54,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:54,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339055675] [2021-12-21 13:25:54,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339055675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:54,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:54,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:54,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291077535] [2021-12-21 13:25:54,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:54,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:54,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:54,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:54,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:54,426 INFO L87 Difference]: Start difference. First operand 3019 states and 3961 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:54,842 INFO L93 Difference]: Finished difference Result 7140 states and 9437 transitions. [2021-12-21 13:25:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:54,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-12-21 13:25:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:54,853 INFO L225 Difference]: With dead ends: 7140 [2021-12-21 13:25:54,853 INFO L226 Difference]: Without dead ends: 4635 [2021-12-21 13:25:54,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:54,857 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 434 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:54,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [434 Valid, 1288 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-12-21 13:25:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 4297. [2021-12-21 13:25:55,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4297 states, 3260 states have (on average 1.316564417177914) internal successors, (4292), 3304 states have internal predecessors, (4292), 672 states have call successors, (672), 364 states have call predecessors, (672), 364 states have return successors, (672), 628 states have call predecessors, (672), 672 states have call successors, (672) [2021-12-21 13:25:55,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4297 states to 4297 states and 5636 transitions. [2021-12-21 13:25:55,130 INFO L78 Accepts]: Start accepts. Automaton has 4297 states and 5636 transitions. Word has length 115 [2021-12-21 13:25:55,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:55,130 INFO L470 AbstractCegarLoop]: Abstraction has 4297 states and 5636 transitions. [2021-12-21 13:25:55,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4297 states and 5636 transitions. [2021-12-21 13:25:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-21 13:25:55,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:55,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:55,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 13:25:55,132 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:55,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:55,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1950956728, now seen corresponding path program 1 times [2021-12-21 13:25:55,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:55,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830514297] [2021-12-21 13:25:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:55,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 13:25:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:25:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 13:25:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 13:25:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 13:25:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-21 13:25:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 13:25:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:55,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:55,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830514297] [2021-12-21 13:25:55,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830514297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:55,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:55,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:55,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662905490] [2021-12-21 13:25:55,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:55,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:55,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:55,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:55,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:55,167 INFO L87 Difference]: Start difference. First operand 4297 states and 5636 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:55,637 INFO L93 Difference]: Finished difference Result 9720 states and 13194 transitions. [2021-12-21 13:25:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:55,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2021-12-21 13:25:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:55,649 INFO L225 Difference]: With dead ends: 9720 [2021-12-21 13:25:55,649 INFO L226 Difference]: Without dead ends: 5828 [2021-12-21 13:25:55,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:55,654 INFO L933 BasicCegarLoop]: 458 mSDtfsCounter, 152 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:55,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 705 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:55,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2021-12-21 13:25:55,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 4303. [2021-12-21 13:25:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 3266 states have (on average 1.3159828536436007) internal successors, (4298), 3310 states have internal predecessors, (4298), 672 states have call successors, (672), 364 states have call predecessors, (672), 364 states have return successors, (672), 628 states have call predecessors, (672), 672 states have call successors, (672) [2021-12-21 13:25:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 5642 transitions. [2021-12-21 13:25:55,931 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 5642 transitions. Word has length 116 [2021-12-21 13:25:55,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:55,931 INFO L470 AbstractCegarLoop]: Abstraction has 4303 states and 5642 transitions. [2021-12-21 13:25:55,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:55,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 5642 transitions. [2021-12-21 13:25:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-21 13:25:55,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:55,933 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:55,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 13:25:55,934 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:55,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:55,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2025473139, now seen corresponding path program 1 times [2021-12-21 13:25:55,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:55,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909500213] [2021-12-21 13:25:55,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:55,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 13:25:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-21 13:25:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 13:25:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 13:25:55,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-21 13:25:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-21 13:25:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 13:25:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:55,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:55,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909500213] [2021-12-21 13:25:55,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909500213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:55,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:55,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:55,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843855060] [2021-12-21 13:25:55,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:55,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:55,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:55,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:55,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:55,990 INFO L87 Difference]: Start difference. First operand 4303 states and 5642 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:56,432 INFO L93 Difference]: Finished difference Result 9016 states and 12080 transitions. [2021-12-21 13:25:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:56,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 117 [2021-12-21 13:25:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:56,444 INFO L225 Difference]: With dead ends: 9016 [2021-12-21 13:25:56,444 INFO L226 Difference]: Without dead ends: 4810 [2021-12-21 13:25:56,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:56,453 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 370 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:56,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 885 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4810 states. [2021-12-21 13:25:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4810 to 3870. [2021-12-21 13:25:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 2916 states have (on average 1.3223593964334706) internal successors, (3856), 2950 states have internal predecessors, (3856), 620 states have call successors, (620), 333 states have call predecessors, (620), 333 states have return successors, (620), 586 states have call predecessors, (620), 620 states have call successors, (620) [2021-12-21 13:25:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 5096 transitions. [2021-12-21 13:25:56,755 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 5096 transitions. Word has length 117 [2021-12-21 13:25:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:56,755 INFO L470 AbstractCegarLoop]: Abstraction has 3870 states and 5096 transitions. [2021-12-21 13:25:56,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 5096 transitions. [2021-12-21 13:25:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 13:25:56,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:56,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:56,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 13:25:56,757 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:56,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:56,758 INFO L85 PathProgramCache]: Analyzing trace with hash 183157843, now seen corresponding path program 1 times [2021-12-21 13:25:56,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:56,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255192986] [2021-12-21 13:25:56,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:56,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:56,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:56,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 13:25:56,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:56,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:25:56,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:56,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 13:25:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:56,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 13:25:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:56,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 13:25:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:56,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-21 13:25:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:56,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 13:25:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:56,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:56,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255192986] [2021-12-21 13:25:56,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255192986] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:56,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:56,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 13:25:56,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966317905] [2021-12-21 13:25:56,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:56,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 13:25:56,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 13:25:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:56,793 INFO L87 Difference]: Start difference. First operand 3870 states and 5096 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:57,174 INFO L93 Difference]: Finished difference Result 8518 states and 11512 transitions. [2021-12-21 13:25:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 13:25:57,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 118 [2021-12-21 13:25:57,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:57,189 INFO L225 Difference]: With dead ends: 8518 [2021-12-21 13:25:57,189 INFO L226 Difference]: Without dead ends: 4861 [2021-12-21 13:25:57,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 13:25:57,198 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 152 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:57,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 681 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:25:57,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-12-21 13:25:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 3880. [2021-12-21 13:25:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3880 states, 2926 states have (on average 1.3212576896787422) internal successors, (3866), 2960 states have internal predecessors, (3866), 620 states have call successors, (620), 333 states have call predecessors, (620), 333 states have return successors, (620), 586 states have call predecessors, (620), 620 states have call successors, (620) [2021-12-21 13:25:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3880 states to 3880 states and 5106 transitions. [2021-12-21 13:25:57,478 INFO L78 Accepts]: Start accepts. Automaton has 3880 states and 5106 transitions. Word has length 118 [2021-12-21 13:25:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:57,478 INFO L470 AbstractCegarLoop]: Abstraction has 3880 states and 5106 transitions. [2021-12-21 13:25:57,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3880 states and 5106 transitions. [2021-12-21 13:25:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-21 13:25:57,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:57,480 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:57,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 13:25:57,480 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:57,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1515793806, now seen corresponding path program 1 times [2021-12-21 13:25:57,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:57,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444149846] [2021-12-21 13:25:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:57,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:57,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:57,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 13:25:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:57,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-21 13:25:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:57,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 13:25:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:57,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 13:25:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:57,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-21 13:25:57,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:57,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-21 13:25:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:57,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 13:25:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 13:25:57,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:57,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444149846] [2021-12-21 13:25:57,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444149846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:25:57,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:25:57,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:25:57,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481114757] [2021-12-21 13:25:57,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:25:57,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:25:57,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:57,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:25:57,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:25:57,531 INFO L87 Difference]: Start difference. First operand 3880 states and 5106 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:57,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:25:57,853 INFO L93 Difference]: Finished difference Result 8465 states and 11428 transitions. [2021-12-21 13:25:57,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:25:57,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 118 [2021-12-21 13:25:57,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:25:57,865 INFO L225 Difference]: With dead ends: 8465 [2021-12-21 13:25:57,865 INFO L226 Difference]: Without dead ends: 4731 [2021-12-21 13:25:57,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:25:57,873 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 285 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:25:57,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 916 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:25:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2021-12-21 13:25:58,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 2927. [2021-12-21 13:25:58,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2207 states have (on average 1.313094698685999) internal successors, (2898), 2226 states have internal predecessors, (2898), 469 states have call successors, (469), 250 states have call predecessors, (469), 250 states have return successors, (469), 450 states have call predecessors, (469), 469 states have call successors, (469) [2021-12-21 13:25:58,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 3836 transitions. [2021-12-21 13:25:58,126 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 3836 transitions. Word has length 118 [2021-12-21 13:25:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:25:58,126 INFO L470 AbstractCegarLoop]: Abstraction has 2927 states and 3836 transitions. [2021-12-21 13:25:58,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:25:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 3836 transitions. [2021-12-21 13:25:58,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-21 13:25:58,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:25:58,130 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:25:58,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 13:25:58,131 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:25:58,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:25:58,131 INFO L85 PathProgramCache]: Analyzing trace with hash -402462666, now seen corresponding path program 1 times [2021-12-21 13:25:58,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:25:58,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41895677] [2021-12-21 13:25:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:58,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:25:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:25:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 13:25:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:25:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:25:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:25:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:25:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:25:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-21 13:25:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-21 13:25:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-21 13:25:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-21 13:25:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-21 13:25:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-21 13:25:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-21 13:25:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-21 13:25:58,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:25:58,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41895677] [2021-12-21 13:25:58,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41895677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:25:58,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812101012] [2021-12-21 13:25:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:25:58,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:25:58,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:25:58,243 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:25:58,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 13:25:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:25:58,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 13:25:58,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:25:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-21 13:25:58,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:25:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 13:25:59,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812101012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:25:59,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:25:59,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-12-21 13:25:59,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047027047] [2021-12-21 13:25:59,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:25:59,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 13:25:59,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:25:59,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 13:25:59,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:25:59,086 INFO L87 Difference]: Start difference. First operand 2927 states and 3836 transitions. Second operand has 14 states, 14 states have (on average 18.857142857142858) internal successors, (264), 13 states have internal predecessors, (264), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-21 13:26:02,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:02,200 INFO L93 Difference]: Finished difference Result 10002 states and 14000 transitions. [2021-12-21 13:26:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-21 13:26:02,201 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.857142857142858) internal successors, (264), 13 states have internal predecessors, (264), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) Word has length 186 [2021-12-21 13:26:02,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:02,218 INFO L225 Difference]: With dead ends: 10002 [2021-12-21 13:26:02,218 INFO L226 Difference]: Without dead ends: 7362 [2021-12-21 13:26:02,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=749, Invalid=3411, Unknown=0, NotChecked=0, Total=4160 [2021-12-21 13:26:02,225 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 4481 mSDsluCounter, 2949 mSDsCounter, 0 mSdLazyCounter, 2038 mSolverCounterSat, 1308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4481 SdHoareTripleChecker+Valid, 3286 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1308 IncrementalHoareTripleChecker+Valid, 2038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:02,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4481 Valid, 3286 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1308 Valid, 2038 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 13:26:02,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2021-12-21 13:26:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 3451. [2021-12-21 13:26:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 2624 states have (on average 1.3090701219512195) internal successors, (3435), 2644 states have internal predecessors, (3435), 531 states have call successors, (531), 295 states have call predecessors, (531), 295 states have return successors, (531), 511 states have call predecessors, (531), 531 states have call successors, (531) [2021-12-21 13:26:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 4497 transitions. [2021-12-21 13:26:02,762 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 4497 transitions. Word has length 186 [2021-12-21 13:26:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:02,762 INFO L470 AbstractCegarLoop]: Abstraction has 3451 states and 4497 transitions. [2021-12-21 13:26:02,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.857142857142858) internal successors, (264), 13 states have internal predecessors, (264), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-21 13:26:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 4497 transitions. [2021-12-21 13:26:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-21 13:26:02,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:02,768 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:02,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 13:26:02,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-21 13:26:02,986 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash 141381451, now seen corresponding path program 1 times [2021-12-21 13:26:02,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:02,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019596525] [2021-12-21 13:26:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:02,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 13:26:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 13:26:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 13:26:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 13:26:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 13:26:03,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 13:26:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-21 13:26:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 13:26:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-21 13:26:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-21 13:26:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-21 13:26:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2021-12-21 13:26:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-21 13:26:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 13:26:03,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:03,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019596525] [2021-12-21 13:26:03,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019596525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:03,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799010236] [2021-12-21 13:26:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:03,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:03,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:03,172 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:26:03,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 13:26:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:03,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 13:26:03,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 53 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:26:03,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 13:26:03,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799010236] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:26:03,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:26:03,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-12-21 13:26:03,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004262181] [2021-12-21 13:26:03,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:26:03,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 13:26:03,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:03,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 13:26:03,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:26:03,977 INFO L87 Difference]: Start difference. First operand 3451 states and 4497 transitions. Second operand has 16 states, 16 states have (on average 16.625) internal successors, (266), 14 states have internal predecessors, (266), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) [2021-12-21 13:26:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:10,812 INFO L93 Difference]: Finished difference Result 17532 states and 23957 transitions. [2021-12-21 13:26:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-21 13:26:10,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.625) internal successors, (266), 14 states have internal predecessors, (266), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) Word has length 194 [2021-12-21 13:26:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:10,856 INFO L225 Difference]: With dead ends: 17532 [2021-12-21 13:26:10,857 INFO L226 Difference]: Without dead ends: 14377 [2021-12-21 13:26:10,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 476 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5045 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1835, Invalid=12207, Unknown=0, NotChecked=0, Total=14042 [2021-12-21 13:26:10,868 INFO L933 BasicCegarLoop]: 1832 mSDtfsCounter, 5889 mSDsluCounter, 13834 mSDsCounter, 0 mSdLazyCounter, 5456 mSolverCounterSat, 3535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5889 SdHoareTripleChecker+Valid, 15666 SdHoareTripleChecker+Invalid, 8991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3535 IncrementalHoareTripleChecker+Valid, 5456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:10,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5889 Valid, 15666 Invalid, 8991 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3535 Valid, 5456 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-21 13:26:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14377 states. [2021-12-21 13:26:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14377 to 6318. [2021-12-21 13:26:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6318 states, 4774 states have (on average 1.3112693757855047) internal successors, (6260), 4812 states have internal predecessors, (6260), 992 states have call successors, (992), 551 states have call predecessors, (992), 551 states have return successors, (992), 954 states have call predecessors, (992), 992 states have call successors, (992) [2021-12-21 13:26:11,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6318 states to 6318 states and 8244 transitions. [2021-12-21 13:26:11,691 INFO L78 Accepts]: Start accepts. Automaton has 6318 states and 8244 transitions. Word has length 194 [2021-12-21 13:26:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:11,692 INFO L470 AbstractCegarLoop]: Abstraction has 6318 states and 8244 transitions. [2021-12-21 13:26:11,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.625) internal successors, (266), 14 states have internal predecessors, (266), 6 states have call successors, (43), 4 states have call predecessors, (43), 7 states have return successors, (42), 8 states have call predecessors, (42), 6 states have call successors, (42) [2021-12-21 13:26:11,692 INFO L276 IsEmpty]: Start isEmpty. Operand 6318 states and 8244 transitions. [2021-12-21 13:26:11,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-21 13:26:11,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:11,701 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:11,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 13:26:11,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-21 13:26:11,919 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:11,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1389154626, now seen corresponding path program 1 times [2021-12-21 13:26:11,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:11,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634428030] [2021-12-21 13:26:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:11,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:26:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:26:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:26:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:26:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 13:26:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:26:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:11,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 13:26:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:12,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 13:26:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:12,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-21 13:26:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:12,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-12-21 13:26:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:12,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-21 13:26:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:12,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2021-12-21 13:26:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:12,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2021-12-21 13:26:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-21 13:26:12,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:12,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634428030] [2021-12-21 13:26:12,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634428030] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:12,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:12,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 13:26:12,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342351012] [2021-12-21 13:26:12,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:12,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 13:26:12,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:12,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 13:26:12,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 13:26:12,019 INFO L87 Difference]: Start difference. First operand 6318 states and 8244 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 13:26:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:14,048 INFO L93 Difference]: Finished difference Result 21338 states and 28586 transitions. [2021-12-21 13:26:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 13:26:14,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 196 [2021-12-21 13:26:14,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:14,097 INFO L225 Difference]: With dead ends: 21338 [2021-12-21 13:26:14,097 INFO L226 Difference]: Without dead ends: 15378 [2021-12-21 13:26:14,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:26:14,113 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 817 mSDsluCounter, 2520 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 3094 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:14,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 3094 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 13:26:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15378 states. [2021-12-21 13:26:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15378 to 8160. [2021-12-21 13:26:15,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8160 states, 6104 states have (on average 1.3086500655307995) internal successors, (7988), 6155 states have internal predecessors, (7988), 1335 states have call successors, (1335), 720 states have call predecessors, (1335), 720 states have return successors, (1335), 1284 states have call predecessors, (1335), 1335 states have call successors, (1335) [2021-12-21 13:26:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8160 states to 8160 states and 10658 transitions. [2021-12-21 13:26:15,106 INFO L78 Accepts]: Start accepts. Automaton has 8160 states and 10658 transitions. Word has length 196 [2021-12-21 13:26:15,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:15,107 INFO L470 AbstractCegarLoop]: Abstraction has 8160 states and 10658 transitions. [2021-12-21 13:26:15,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 13:26:15,107 INFO L276 IsEmpty]: Start isEmpty. Operand 8160 states and 10658 transitions. [2021-12-21 13:26:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-21 13:26:15,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:15,118 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:15,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 13:26:15,118 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1333769863, now seen corresponding path program 1 times [2021-12-21 13:26:15,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:15,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860275623] [2021-12-21 13:26:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:15,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:15,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:26:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:26:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:26:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:26:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 13:26:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:26:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 13:26:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 13:26:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-21 13:26:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-21 13:26:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-21 13:26:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-21 13:26:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-21 13:26:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 13:26:15,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:15,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860275623] [2021-12-21 13:26:15,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860275623] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:15,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127190038] [2021-12-21 13:26:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:15,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:15,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:15,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:26:15,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 13:26:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 13:26:15,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-21 13:26:15,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-21 13:26:16,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127190038] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:16,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 13:26:16,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 7] total 14 [2021-12-21 13:26:16,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045549009] [2021-12-21 13:26:16,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:16,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:16,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:16,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:16,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:26:16,079 INFO L87 Difference]: Start difference. First operand 8160 states and 10658 transitions. Second operand has 5 states, 4 states have (on average 28.75) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 13:26:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:16,584 INFO L93 Difference]: Finished difference Result 13442 states and 17611 transitions. [2021-12-21 13:26:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:16,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 28.75) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) Word has length 198 [2021-12-21 13:26:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:16,599 INFO L225 Difference]: With dead ends: 13442 [2021-12-21 13:26:16,600 INFO L226 Difference]: Without dead ends: 5488 [2021-12-21 13:26:16,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:26:16,610 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 2 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:16,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 871 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 13:26:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5488 states. [2021-12-21 13:26:17,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5488 to 5488. [2021-12-21 13:26:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 4106 states have (on average 1.3080857282026304) internal successors, (5371), 4140 states have internal predecessors, (5371), 901 states have call successors, (901), 480 states have call predecessors, (901), 480 states have return successors, (901), 867 states have call predecessors, (901), 901 states have call successors, (901) [2021-12-21 13:26:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 7173 transitions. [2021-12-21 13:26:17,193 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 7173 transitions. Word has length 198 [2021-12-21 13:26:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:17,194 INFO L470 AbstractCegarLoop]: Abstraction has 5488 states and 7173 transitions. [2021-12-21 13:26:17,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 28.75) internal successors, (115), 5 states have internal predecessors, (115), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-21 13:26:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 7173 transitions. [2021-12-21 13:26:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-21 13:26:17,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:17,201 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:17,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 13:26:17,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:17,418 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:17,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:17,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1056461284, now seen corresponding path program 1 times [2021-12-21 13:26:17,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:17,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227064396] [2021-12-21 13:26:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:17,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:26:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:26:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:26:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:26:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 13:26:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:26:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 13:26:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-21 13:26:17,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-21 13:26:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-21 13:26:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-21 13:26:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-21 13:26:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-21 13:26:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 13:26:17,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:17,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227064396] [2021-12-21 13:26:17,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227064396] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:17,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236026193] [2021-12-21 13:26:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:17,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:17,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:17,586 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:26:17,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 13:26:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:17,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 13:26:17,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 71 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 13:26:18,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 13:26:18,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236026193] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:26:18,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:26:18,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2021-12-21 13:26:18,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518608754] [2021-12-21 13:26:18,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:26:18,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 13:26:18,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:18,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 13:26:18,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-12-21 13:26:18,785 INFO L87 Difference]: Start difference. First operand 5488 states and 7173 transitions. Second operand has 24 states, 24 states have (on average 14.375) internal successors, (345), 24 states have internal predecessors, (345), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2021-12-21 13:26:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:32,296 INFO L93 Difference]: Finished difference Result 27311 states and 38275 transitions. [2021-12-21 13:26:32,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-12-21 13:26:32,297 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 14.375) internal successors, (345), 24 states have internal predecessors, (345), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) Word has length 198 [2021-12-21 13:26:32,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:32,355 INFO L225 Difference]: With dead ends: 27311 [2021-12-21 13:26:32,355 INFO L226 Difference]: Without dead ends: 22107 [2021-12-21 13:26:32,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 417 SyntacticMatches, 1 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20333 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5256, Invalid=44696, Unknown=0, NotChecked=0, Total=49952 [2021-12-21 13:26:32,377 INFO L933 BasicCegarLoop]: 698 mSDtfsCounter, 10125 mSDsluCounter, 8137 mSDsCounter, 0 mSdLazyCounter, 12310 mSolverCounterSat, 4950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10125 SdHoareTripleChecker+Valid, 8835 SdHoareTripleChecker+Invalid, 17260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4950 IncrementalHoareTripleChecker+Valid, 12310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:32,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10125 Valid, 8835 Invalid, 17260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4950 Valid, 12310 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-21 13:26:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22107 states. [2021-12-21 13:26:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22107 to 11273. [2021-12-21 13:26:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11273 states, 8504 states have (on average 1.3065616180620885) internal successors, (11111), 8570 states have internal predecessors, (11111), 1785 states have call successors, (1785), 983 states have call predecessors, (1785), 983 states have return successors, (1785), 1719 states have call predecessors, (1785), 1785 states have call successors, (1785) [2021-12-21 13:26:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11273 states to 11273 states and 14681 transitions. [2021-12-21 13:26:33,878 INFO L78 Accepts]: Start accepts. Automaton has 11273 states and 14681 transitions. Word has length 198 [2021-12-21 13:26:33,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:33,880 INFO L470 AbstractCegarLoop]: Abstraction has 11273 states and 14681 transitions. [2021-12-21 13:26:33,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 14.375) internal successors, (345), 24 states have internal predecessors, (345), 9 states have call successors, (41), 5 states have call predecessors, (41), 5 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2021-12-21 13:26:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 11273 states and 14681 transitions. [2021-12-21 13:26:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-21 13:26:33,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:33,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:33,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 13:26:34,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:34,118 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:34,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:34,119 INFO L85 PathProgramCache]: Analyzing trace with hash 988856049, now seen corresponding path program 1 times [2021-12-21 13:26:34,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:34,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150628653] [2021-12-21 13:26:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:34,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:26:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:26:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:26:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:26:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 13:26:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:26:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 13:26:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-21 13:26:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-21 13:26:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-12-21 13:26:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-21 13:26:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-21 13:26:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-21 13:26:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-21 13:26:34,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150628653] [2021-12-21 13:26:34,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150628653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:34,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:34,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 13:26:34,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855675396] [2021-12-21 13:26:34,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:34,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 13:26:34,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:34,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 13:26:34,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:34,231 INFO L87 Difference]: Start difference. First operand 11273 states and 14681 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 13:26:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:35,430 INFO L93 Difference]: Finished difference Result 21529 states and 28129 transitions. [2021-12-21 13:26:35,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 13:26:35,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 198 [2021-12-21 13:26:35,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:35,452 INFO L225 Difference]: With dead ends: 21529 [2021-12-21 13:26:35,452 INFO L226 Difference]: Without dead ends: 10523 [2021-12-21 13:26:35,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 13:26:35,463 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 287 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:35,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 442 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:26:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10523 states. [2021-12-21 13:26:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10523 to 10523. [2021-12-21 13:26:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10523 states, 7946 states have (on average 1.30845708532595) internal successors, (10397), 8008 states have internal predecessors, (10397), 1663 states have call successors, (1663), 913 states have call predecessors, (1663), 913 states have return successors, (1663), 1601 states have call predecessors, (1663), 1663 states have call successors, (1663) [2021-12-21 13:26:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10523 states to 10523 states and 13723 transitions. [2021-12-21 13:26:36,547 INFO L78 Accepts]: Start accepts. Automaton has 10523 states and 13723 transitions. Word has length 198 [2021-12-21 13:26:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:36,547 INFO L470 AbstractCegarLoop]: Abstraction has 10523 states and 13723 transitions. [2021-12-21 13:26:36,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 13:26:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 10523 states and 13723 transitions. [2021-12-21 13:26:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-21 13:26:36,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:36,559 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:36,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-21 13:26:36,559 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:36,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:36,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2041661109, now seen corresponding path program 1 times [2021-12-21 13:26:36,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:36,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189267462] [2021-12-21 13:26:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:36,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:26:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:26:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:26:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:26:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 13:26:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:26:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 13:26:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-21 13:26:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-21 13:26:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-21 13:26:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-21 13:26:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-21 13:26:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-21 13:26:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-21 13:26:36,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:36,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189267462] [2021-12-21 13:26:36,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189267462] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:26:36,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826675687] [2021-12-21 13:26:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:36,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:26:36,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:26:36,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:26:36,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 13:26:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:36,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 13:26:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:26:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 4 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 13:26:37,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:26:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-21 13:26:37,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826675687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:26:37,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:26:37,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2021-12-21 13:26:37,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105897385] [2021-12-21 13:26:37,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:26:37,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 13:26:37,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 13:26:37,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:26:37,516 INFO L87 Difference]: Start difference. First operand 10523 states and 13723 transitions. Second operand has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 16 states have internal predecessors, (259), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-21 13:26:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:44,066 INFO L93 Difference]: Finished difference Result 32522 states and 44939 transitions. [2021-12-21 13:26:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-21 13:26:44,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 16 states have internal predecessors, (259), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) Word has length 199 [2021-12-21 13:26:44,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:44,122 INFO L225 Difference]: With dead ends: 32522 [2021-12-21 13:26:44,123 INFO L226 Difference]: Without dead ends: 22305 [2021-12-21 13:26:44,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=886, Invalid=5594, Unknown=0, NotChecked=0, Total=6480 [2021-12-21 13:26:44,155 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 3052 mSDsluCounter, 6325 mSDsCounter, 0 mSdLazyCounter, 5298 mSolverCounterSat, 1476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3052 SdHoareTripleChecker+Valid, 6969 SdHoareTripleChecker+Invalid, 6774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1476 IncrementalHoareTripleChecker+Valid, 5298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:44,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3052 Valid, 6969 Invalid, 6774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1476 Valid, 5298 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 13:26:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22305 states. [2021-12-21 13:26:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22305 to 11869. [2021-12-21 13:26:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11869 states, 8972 states have (on average 1.3039456085599643) internal successors, (11699), 9042 states have internal predecessors, (11699), 1863 states have call successors, (1863), 1033 states have call predecessors, (1863), 1033 states have return successors, (1863), 1793 states have call predecessors, (1863), 1863 states have call successors, (1863) [2021-12-21 13:26:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11869 states to 11869 states and 15425 transitions. [2021-12-21 13:26:45,995 INFO L78 Accepts]: Start accepts. Automaton has 11869 states and 15425 transitions. Word has length 199 [2021-12-21 13:26:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:26:45,995 INFO L470 AbstractCegarLoop]: Abstraction has 11869 states and 15425 transitions. [2021-12-21 13:26:45,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.235294117647058) internal successors, (259), 16 states have internal predecessors, (259), 6 states have call successors, (37), 4 states have call predecessors, (37), 6 states have return successors, (37), 7 states have call predecessors, (37), 6 states have call successors, (37) [2021-12-21 13:26:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 11869 states and 15425 transitions. [2021-12-21 13:26:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-21 13:26:46,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:26:46,009 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:26:46,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 13:26:46,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-21 13:26:46,232 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:26:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:26:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1117795559, now seen corresponding path program 1 times [2021-12-21 13:26:46,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:26:46,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739213303] [2021-12-21 13:26:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:26:46,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:26:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:26:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 13:26:46,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:26:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 13:26:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 13:26:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 13:26:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 13:26:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 13:26:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-21 13:26:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 13:26:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-21 13:26:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-21 13:26:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-21 13:26:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2021-12-21 13:26:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-12-21 13:26:46,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2021-12-21 13:26:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:26:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-21 13:26:46,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:26:46,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739213303] [2021-12-21 13:26:46,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739213303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:26:46,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:26:46,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 13:26:46,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175734400] [2021-12-21 13:26:46,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:26:46,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:26:46,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:26:46,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:26:46,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:26:46,306 INFO L87 Difference]: Start difference. First operand 11869 states and 15425 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-21 13:26:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:26:47,589 INFO L93 Difference]: Finished difference Result 22325 states and 29122 transitions. [2021-12-21 13:26:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 13:26:47,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 207 [2021-12-21 13:26:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:26:47,614 INFO L225 Difference]: With dead ends: 22325 [2021-12-21 13:26:47,614 INFO L226 Difference]: Without dead ends: 10725 [2021-12-21 13:26:47,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 13:26:47,628 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 233 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:26:47,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 492 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 13:26:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10725 states.