./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_9.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/locks/test_locks_9.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 04dc39fb366d4472036345a213cca0ee8b355c41bc9af7e685ecaa2d36ed9484 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:56:13,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:56:13,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:56:13,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:56:13,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:56:13,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:56:13,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:56:13,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:56:13,739 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:56:13,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:56:13,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:56:13,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:56:13,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:56:13,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:56:13,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:56:13,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:56:13,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:56:13,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:56:13,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:56:13,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:56:13,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:56:13,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:56:13,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:56:13,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:56:13,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:56:13,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:56:13,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:56:13,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:56:13,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:56:13,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:56:13,770 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:56:13,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:56:13,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:56:13,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:56:13,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:56:13,773 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:56:13,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:56:13,774 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:56:13,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:56:13,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:56:13,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:56:13,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:56:13,803 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:56:13,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:56:13,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:56:13,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:56:13,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:56:13,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:56:13,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:56:13,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:56:13,807 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:56:13,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:56:13,808 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:56:13,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:56:13,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:56:13,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:56:13,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:56:13,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:56:13,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:56:13,809 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:56:13,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:56:13,809 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:56:13,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:56:13,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:56:13,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:56:13,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:56:13,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:56:13,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:56:13,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:56:13,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:56:13,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:56:13,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:56:13,811 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:56:13,811 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:56:13,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:56:13,812 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04dc39fb366d4472036345a213cca0ee8b355c41bc9af7e685ecaa2d36ed9484 [2021-12-27 21:56:14,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:56:14,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:56:14,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:56:14,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:56:14,100 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:56:14,101 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_9.c [2021-12-27 21:56:14,163 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc4eb43c0/f55f8b9947cd42909589578b949f567b/FLAG27ee4e78e [2021-12-27 21:56:14,490 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:56:14,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_9.c [2021-12-27 21:56:14,495 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc4eb43c0/f55f8b9947cd42909589578b949f567b/FLAG27ee4e78e [2021-12-27 21:56:14,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc4eb43c0/f55f8b9947cd42909589578b949f567b [2021-12-27 21:56:14,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:56:14,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:56:14,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:56:14,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:56:14,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:56:14,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66126ac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14, skipping insertion in model container [2021-12-27 21:56:14,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:56:14,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:56:14,644 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/locks/test_locks_9.c[3555,3568] [2021-12-27 21:56:14,647 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:56:14,653 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:56:14,688 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/locks/test_locks_9.c[3555,3568] [2021-12-27 21:56:14,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:56:14,709 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:56:14,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14 WrapperNode [2021-12-27 21:56:14,710 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:56:14,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:56:14,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:56:14,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:56:14,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,745 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 127 [2021-12-27 21:56:14,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:56:14,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:56:14,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:56:14,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:56:14,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:56:14,779 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:56:14,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:56:14,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:56:14,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14" (1/1) ... [2021-12-27 21:56:14,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:56:14,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:56:14,803 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) [2021-12-27 21:56:14,866 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 [2021-12-27 21:56:14,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:56:14,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:56:14,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:56:14,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:56:14,938 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:56:14,939 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:56:15,103 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:56:15,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:56:15,108 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 21:56:15,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:56:15 BoogieIcfgContainer [2021-12-27 21:56:15,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:56:15,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:56:15,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:56:15,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:56:15,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:56:14" (1/3) ... [2021-12-27 21:56:15,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563e5a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:56:15, skipping insertion in model container [2021-12-27 21:56:15,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:56:14" (2/3) ... [2021-12-27 21:56:15,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563e5a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:56:15, skipping insertion in model container [2021-12-27 21:56:15,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:56:15" (3/3) ... [2021-12-27 21:56:15,116 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2021-12-27 21:56:15,119 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:56:15,120 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:56:15,170 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:56:15,184 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 [2021-12-27 21:56:15,193 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:56:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-27 21:56:15,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:15,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:15,221 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:15,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1657621241, now seen corresponding path program 1 times [2021-12-27 21:56:15,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:15,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102526902] [2021-12-27 21:56:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:15,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:15,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:15,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102526902] [2021-12-27 21:56:15,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102526902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:15,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:15,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:15,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714679713] [2021-12-27 21:56:15,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:15,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:15,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:15,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:15,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,435 INFO L87 Difference]: Start difference. First operand has 37 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:15,476 INFO L93 Difference]: Finished difference Result 77 states and 133 transitions. [2021-12-27 21:56:15,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:15,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-27 21:56:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:15,486 INFO L225 Difference]: With dead ends: 77 [2021-12-27 21:56:15,487 INFO L226 Difference]: Without dead ends: 63 [2021-12-27 21:56:15,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,496 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 47 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:15,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 127 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-27 21:56:15,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2021-12-27 21:56:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-12-27 21:56:15,529 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-12-27 21:56:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:15,529 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-12-27 21:56:15,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-12-27 21:56:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-27 21:56:15,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:15,532 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:15,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:56:15,532 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:15,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:15,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1399455803, now seen corresponding path program 1 times [2021-12-27 21:56:15,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:15,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376577085] [2021-12-27 21:56:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:15,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:15,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:15,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376577085] [2021-12-27 21:56:15,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376577085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:15,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:15,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:15,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715457303] [2021-12-27 21:56:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:15,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:15,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:15,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,597 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:15,622 INFO L93 Difference]: Finished difference Result 104 states and 189 transitions. [2021-12-27 21:56:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:15,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-27 21:56:15,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:15,625 INFO L225 Difference]: With dead ends: 104 [2021-12-27 21:56:15,625 INFO L226 Difference]: Without dead ends: 63 [2021-12-27 21:56:15,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,629 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 43 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:15,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 129 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-27 21:56:15,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2021-12-27 21:56:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8333333333333333) internal successors, (110), 60 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 110 transitions. [2021-12-27 21:56:15,644 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 110 transitions. Word has length 16 [2021-12-27 21:56:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:15,644 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 110 transitions. [2021-12-27 21:56:15,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,645 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 110 transitions. [2021-12-27 21:56:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-27 21:56:15,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:15,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:15,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 21:56:15,647 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:15,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:15,648 INFO L85 PathProgramCache]: Analyzing trace with hash 153562753, now seen corresponding path program 1 times [2021-12-27 21:56:15,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:15,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835368625] [2021-12-27 21:56:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:15,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:15,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:15,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835368625] [2021-12-27 21:56:15,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835368625] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:15,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:15,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:15,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581250653] [2021-12-27 21:56:15,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:15,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:15,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:15,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:15,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,700 INFO L87 Difference]: Start difference. First operand 61 states and 110 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:15,718 INFO L93 Difference]: Finished difference Result 96 states and 168 transitions. [2021-12-27 21:56:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:15,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-27 21:56:15,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:15,719 INFO L225 Difference]: With dead ends: 96 [2021-12-27 21:56:15,720 INFO L226 Difference]: Without dead ends: 66 [2021-12-27 21:56:15,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,721 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 45 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:15,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 144 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-27 21:56:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-12-27 21:56:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.7777777777777777) internal successors, (112), 63 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 112 transitions. [2021-12-27 21:56:15,730 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 112 transitions. Word has length 17 [2021-12-27 21:56:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:15,731 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 112 transitions. [2021-12-27 21:56:15,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 112 transitions. [2021-12-27 21:56:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-27 21:56:15,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:15,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:15,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 21:56:15,732 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:15,734 INFO L85 PathProgramCache]: Analyzing trace with hash -433243261, now seen corresponding path program 1 times [2021-12-27 21:56:15,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:15,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679337948] [2021-12-27 21:56:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:15,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:15,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:15,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:15,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679337948] [2021-12-27 21:56:15,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679337948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:15,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:15,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:15,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634547643] [2021-12-27 21:56:15,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:15,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:15,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:15,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:15,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,786 INFO L87 Difference]: Start difference. First operand 64 states and 112 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:15,801 INFO L93 Difference]: Finished difference Result 121 states and 213 transitions. [2021-12-27 21:56:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-27 21:56:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:15,803 INFO L225 Difference]: With dead ends: 121 [2021-12-27 21:56:15,803 INFO L226 Difference]: Without dead ends: 119 [2021-12-27 21:56:15,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,804 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 40 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:15,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 113 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-27 21:56:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2021-12-27 21:56:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.7738095238095237) internal successors, (149), 84 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 149 transitions. [2021-12-27 21:56:15,816 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 149 transitions. Word has length 17 [2021-12-27 21:56:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:15,816 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 149 transitions. [2021-12-27 21:56:15,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 149 transitions. [2021-12-27 21:56:15,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-27 21:56:15,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:15,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:15,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-27 21:56:15,818 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:15,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:15,818 INFO L85 PathProgramCache]: Analyzing trace with hash -175077823, now seen corresponding path program 1 times [2021-12-27 21:56:15,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:15,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561242781] [2021-12-27 21:56:15,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:15,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:15,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:15,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561242781] [2021-12-27 21:56:15,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561242781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:15,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:15,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:15,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880438776] [2021-12-27 21:56:15,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:15,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:15,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:15,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:15,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,851 INFO L87 Difference]: Start difference. First operand 85 states and 149 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:15,885 INFO L93 Difference]: Finished difference Result 201 states and 355 transitions. [2021-12-27 21:56:15,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:15,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-27 21:56:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:15,886 INFO L225 Difference]: With dead ends: 201 [2021-12-27 21:56:15,886 INFO L226 Difference]: Without dead ends: 121 [2021-12-27 21:56:15,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,887 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:15,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 130 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-27 21:56:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-12-27 21:56:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.7542372881355932) internal successors, (207), 118 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 207 transitions. [2021-12-27 21:56:15,901 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 207 transitions. Word has length 17 [2021-12-27 21:56:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:15,901 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 207 transitions. [2021-12-27 21:56:15,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 207 transitions. [2021-12-27 21:56:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-27 21:56:15,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:15,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:15,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-27 21:56:15,905 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:15,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:15,907 INFO L85 PathProgramCache]: Analyzing trace with hash -545425190, now seen corresponding path program 1 times [2021-12-27 21:56:15,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:15,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717079837] [2021-12-27 21:56:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:15,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:15,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:15,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717079837] [2021-12-27 21:56:15,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717079837] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:15,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:15,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:15,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866049260] [2021-12-27 21:56:15,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:15,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:15,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:15,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:15,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,943 INFO L87 Difference]: Start difference. First operand 119 states and 207 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:15,952 INFO L93 Difference]: Finished difference Result 180 states and 310 transitions. [2021-12-27 21:56:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:15,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-27 21:56:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:15,953 INFO L225 Difference]: With dead ends: 180 [2021-12-27 21:56:15,953 INFO L226 Difference]: Without dead ends: 123 [2021-12-27 21:56:15,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,954 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 44 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:15,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 140 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-27 21:56:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2021-12-27 21:56:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.725) internal successors, (207), 120 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 207 transitions. [2021-12-27 21:56:15,961 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 207 transitions. Word has length 18 [2021-12-27 21:56:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:15,961 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 207 transitions. [2021-12-27 21:56:15,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 207 transitions. [2021-12-27 21:56:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-27 21:56:15,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:15,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:15,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-27 21:56:15,963 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1132231204, now seen corresponding path program 1 times [2021-12-27 21:56:15,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:15,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963460675] [2021-12-27 21:56:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:15,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:15,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:15,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963460675] [2021-12-27 21:56:15,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963460675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:15,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:15,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:15,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859608171] [2021-12-27 21:56:15,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:15,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:15,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:15,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,985 INFO L87 Difference]: Start difference. First operand 121 states and 207 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:15,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:15,994 INFO L93 Difference]: Finished difference Result 345 states and 593 transitions. [2021-12-27 21:56:15,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:15,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-27 21:56:15,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:15,996 INFO L225 Difference]: With dead ends: 345 [2021-12-27 21:56:15,996 INFO L226 Difference]: Without dead ends: 231 [2021-12-27 21:56:15,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:15,997 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:15,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 115 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-27 21:56:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2021-12-27 21:56:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6973684210526316) internal successors, (387), 228 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 387 transitions. [2021-12-27 21:56:16,006 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 387 transitions. Word has length 18 [2021-12-27 21:56:16,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,006 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 387 transitions. [2021-12-27 21:56:16,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 387 transitions. [2021-12-27 21:56:16,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-27 21:56:16,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:16,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-27 21:56:16,008 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1390396642, now seen corresponding path program 1 times [2021-12-27 21:56:16,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794711017] [2021-12-27 21:56:16,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794711017] [2021-12-27 21:56:16,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794711017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840709761] [2021-12-27 21:56:16,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,028 INFO L87 Difference]: Start difference. First operand 229 states and 387 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,035 INFO L93 Difference]: Finished difference Result 289 states and 493 transitions. [2021-12-27 21:56:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-27 21:56:16,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,037 INFO L225 Difference]: With dead ends: 289 [2021-12-27 21:56:16,037 INFO L226 Difference]: Without dead ends: 287 [2021-12-27 21:56:16,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,038 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 37 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 152 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-27 21:56:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 229. [2021-12-27 21:56:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.6798245614035088) internal successors, (383), 228 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 383 transitions. [2021-12-27 21:56:16,044 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 383 transitions. Word has length 18 [2021-12-27 21:56:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,045 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 383 transitions. [2021-12-27 21:56:16,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 383 transitions. [2021-12-27 21:56:16,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-27 21:56:16,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:16,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-27 21:56:16,046 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,047 INFO L85 PathProgramCache]: Analyzing trace with hash -739214602, now seen corresponding path program 1 times [2021-12-27 21:56:16,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618621633] [2021-12-27 21:56:16,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618621633] [2021-12-27 21:56:16,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618621633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306356432] [2021-12-27 21:56:16,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,065 INFO L87 Difference]: Start difference. First operand 229 states and 383 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,075 INFO L93 Difference]: Finished difference Result 421 states and 713 transitions. [2021-12-27 21:56:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-27 21:56:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,076 INFO L225 Difference]: With dead ends: 421 [2021-12-27 21:56:16,077 INFO L226 Difference]: Without dead ends: 419 [2021-12-27 21:56:16,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,078 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 34 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 109 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-12-27 21:56:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 321. [2021-12-27 21:56:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.646875) internal successors, (527), 320 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 527 transitions. [2021-12-27 21:56:16,089 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 527 transitions. Word has length 19 [2021-12-27 21:56:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,089 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 527 transitions. [2021-12-27 21:56:16,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 527 transitions. [2021-12-27 21:56:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-27 21:56:16,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:56:16,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-27 21:56:16,091 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash -481049164, now seen corresponding path program 1 times [2021-12-27 21:56:16,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275310759] [2021-12-27 21:56:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275310759] [2021-12-27 21:56:16,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275310759] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814868889] [2021-12-27 21:56:16,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,109 INFO L87 Difference]: Start difference. First operand 321 states and 527 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,120 INFO L93 Difference]: Finished difference Result 757 states and 1249 transitions. [2021-12-27 21:56:16,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-27 21:56:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,122 INFO L225 Difference]: With dead ends: 757 [2021-12-27 21:56:16,122 INFO L226 Difference]: Without dead ends: 443 [2021-12-27 21:56:16,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,124 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 40 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 132 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-12-27 21:56:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 441. [2021-12-27 21:56:16,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.625) internal successors, (715), 440 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 715 transitions. [2021-12-27 21:56:16,133 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 715 transitions. Word has length 19 [2021-12-27 21:56:16,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,133 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 715 transitions. [2021-12-27 21:56:16,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,133 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 715 transitions. [2021-12-27 21:56:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-27 21:56:16,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,134 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] [2021-12-27 21:56:16,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-27 21:56:16,134 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1440601487, now seen corresponding path program 1 times [2021-12-27 21:56:16,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421572485] [2021-12-27 21:56:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421572485] [2021-12-27 21:56:16,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421572485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683653022] [2021-12-27 21:56:16,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,153 INFO L87 Difference]: Start difference. First operand 441 states and 715 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,163 INFO L93 Difference]: Finished difference Result 669 states and 1081 transitions. [2021-12-27 21:56:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-27 21:56:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,165 INFO L225 Difference]: With dead ends: 669 [2021-12-27 21:56:16,165 INFO L226 Difference]: Without dead ends: 455 [2021-12-27 21:56:16,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,166 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 42 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 132 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-27 21:56:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 453. [2021-12-27 21:56:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.5995575221238938) internal successors, (723), 452 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 723 transitions. [2021-12-27 21:56:16,176 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 723 transitions. Word has length 20 [2021-12-27 21:56:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,176 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 723 transitions. [2021-12-27 21:56:16,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,176 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 723 transitions. [2021-12-27 21:56:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-27 21:56:16,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,177 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] [2021-12-27 21:56:16,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-27 21:56:16,177 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,178 INFO L85 PathProgramCache]: Analyzing trace with hash -2027407501, now seen corresponding path program 1 times [2021-12-27 21:56:16,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955328866] [2021-12-27 21:56:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955328866] [2021-12-27 21:56:16,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955328866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402409708] [2021-12-27 21:56:16,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,195 INFO L87 Difference]: Start difference. First operand 453 states and 723 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,206 INFO L93 Difference]: Finished difference Result 809 states and 1309 transitions. [2021-12-27 21:56:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-27 21:56:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,209 INFO L225 Difference]: With dead ends: 809 [2021-12-27 21:56:16,209 INFO L226 Difference]: Without dead ends: 807 [2021-12-27 21:56:16,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,210 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 31 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 107 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-12-27 21:56:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 645. [2021-12-27 21:56:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 1.5574534161490683) internal successors, (1003), 644 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1003 transitions. [2021-12-27 21:56:16,227 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1003 transitions. Word has length 20 [2021-12-27 21:56:16,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,227 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 1003 transitions. [2021-12-27 21:56:16,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1003 transitions. [2021-12-27 21:56:16,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-27 21:56:16,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,228 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] [2021-12-27 21:56:16,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-27 21:56:16,229 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1769242063, now seen corresponding path program 1 times [2021-12-27 21:56:16,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748580875] [2021-12-27 21:56:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748580875] [2021-12-27 21:56:16,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748580875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585405175] [2021-12-27 21:56:16,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,246 INFO L87 Difference]: Start difference. First operand 645 states and 1003 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,260 INFO L93 Difference]: Finished difference Result 1497 states and 2333 transitions. [2021-12-27 21:56:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-27 21:56:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,263 INFO L225 Difference]: With dead ends: 1497 [2021-12-27 21:56:16,263 INFO L226 Difference]: Without dead ends: 871 [2021-12-27 21:56:16,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,265 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 39 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 133 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-12-27 21:56:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 869. [2021-12-27 21:56:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.5334101382488479) internal successors, (1331), 868 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1331 transitions. [2021-12-27 21:56:16,284 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1331 transitions. Word has length 20 [2021-12-27 21:56:16,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,284 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 1331 transitions. [2021-12-27 21:56:16,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1331 transitions. [2021-12-27 21:56:16,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:56:16,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,286 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] [2021-12-27 21:56:16,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-27 21:56:16,286 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1575091945, now seen corresponding path program 1 times [2021-12-27 21:56:16,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329083101] [2021-12-27 21:56:16,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329083101] [2021-12-27 21:56:16,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329083101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889085072] [2021-12-27 21:56:16,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,302 INFO L87 Difference]: Start difference. First operand 869 states and 1331 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,314 INFO L93 Difference]: Finished difference Result 1305 states and 1989 transitions. [2021-12-27 21:56:16,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-27 21:56:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,317 INFO L225 Difference]: With dead ends: 1305 [2021-12-27 21:56:16,317 INFO L226 Difference]: Without dead ends: 887 [2021-12-27 21:56:16,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,318 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 41 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 128 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-12-27 21:56:16,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 885. [2021-12-27 21:56:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 1.505656108597285) internal successors, (1331), 884 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1331 transitions. [2021-12-27 21:56:16,341 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1331 transitions. Word has length 21 [2021-12-27 21:56:16,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,341 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 1331 transitions. [2021-12-27 21:56:16,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1331 transitions. [2021-12-27 21:56:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:56:16,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,342 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] [2021-12-27 21:56:16,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-27 21:56:16,342 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,343 INFO L85 PathProgramCache]: Analyzing trace with hash 988285931, now seen corresponding path program 1 times [2021-12-27 21:56:16,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061516347] [2021-12-27 21:56:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061516347] [2021-12-27 21:56:16,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061516347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717378265] [2021-12-27 21:56:16,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,358 INFO L87 Difference]: Start difference. First operand 885 states and 1331 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,376 INFO L93 Difference]: Finished difference Result 1545 states and 2357 transitions. [2021-12-27 21:56:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-27 21:56:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,380 INFO L225 Difference]: With dead ends: 1545 [2021-12-27 21:56:16,381 INFO L226 Difference]: Without dead ends: 1543 [2021-12-27 21:56:16,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,382 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 28 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 105 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-12-27 21:56:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1285. [2021-12-27 21:56:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 1.4602803738317758) internal successors, (1875), 1284 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1875 transitions. [2021-12-27 21:56:16,405 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1875 transitions. Word has length 21 [2021-12-27 21:56:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,405 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 1875 transitions. [2021-12-27 21:56:16,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1875 transitions. [2021-12-27 21:56:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-27 21:56:16,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,407 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] [2021-12-27 21:56:16,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-27 21:56:16,407 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1246451369, now seen corresponding path program 1 times [2021-12-27 21:56:16,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619315707] [2021-12-27 21:56:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619315707] [2021-12-27 21:56:16,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619315707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465620835] [2021-12-27 21:56:16,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,422 INFO L87 Difference]: Start difference. First operand 1285 states and 1875 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,456 INFO L93 Difference]: Finished difference Result 2953 states and 4309 transitions. [2021-12-27 21:56:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-27 21:56:16,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,461 INFO L225 Difference]: With dead ends: 2953 [2021-12-27 21:56:16,461 INFO L226 Difference]: Without dead ends: 1703 [2021-12-27 21:56:16,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,463 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 38 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 134 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-12-27 21:56:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1701. [2021-12-27 21:56:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 1.4323529411764706) internal successors, (2435), 1700 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 2435 transitions. [2021-12-27 21:56:16,498 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 2435 transitions. Word has length 21 [2021-12-27 21:56:16,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,498 INFO L470 AbstractCegarLoop]: Abstraction has 1701 states and 2435 transitions. [2021-12-27 21:56:16,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 2435 transitions. [2021-12-27 21:56:16,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 21:56:16,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,499 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] [2021-12-27 21:56:16,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-27 21:56:16,500 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,500 INFO L85 PathProgramCache]: Analyzing trace with hash 572308166, now seen corresponding path program 1 times [2021-12-27 21:56:16,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444736940] [2021-12-27 21:56:16,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444736940] [2021-12-27 21:56:16,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444736940] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285449648] [2021-12-27 21:56:16,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,514 INFO L87 Difference]: Start difference. First operand 1701 states and 2435 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,534 INFO L93 Difference]: Finished difference Result 2553 states and 3637 transitions. [2021-12-27 21:56:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-27 21:56:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,539 INFO L225 Difference]: With dead ends: 2553 [2021-12-27 21:56:16,539 INFO L226 Difference]: Without dead ends: 1735 [2021-12-27 21:56:16,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,540 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 40 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 124 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-12-27 21:56:16,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1733. [2021-12-27 21:56:16,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 1.4058891454965359) internal successors, (2435), 1732 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 2435 transitions. [2021-12-27 21:56:16,586 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 2435 transitions. Word has length 22 [2021-12-27 21:56:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,587 INFO L470 AbstractCegarLoop]: Abstraction has 1733 states and 2435 transitions. [2021-12-27 21:56:16,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 2435 transitions. [2021-12-27 21:56:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 21:56:16,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,588 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] [2021-12-27 21:56:16,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-27 21:56:16,589 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash -14497848, now seen corresponding path program 1 times [2021-12-27 21:56:16,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17340683] [2021-12-27 21:56:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17340683] [2021-12-27 21:56:16,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17340683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173612792] [2021-12-27 21:56:16,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,603 INFO L87 Difference]: Start difference. First operand 1733 states and 2435 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,631 INFO L93 Difference]: Finished difference Result 2953 states and 4197 transitions. [2021-12-27 21:56:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-27 21:56:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,639 INFO L225 Difference]: With dead ends: 2953 [2021-12-27 21:56:16,639 INFO L226 Difference]: Without dead ends: 2951 [2021-12-27 21:56:16,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,640 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 25 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 103 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-12-27 21:56:16,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2565. [2021-12-27 21:56:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2565 states, 2564 states have (on average 1.361544461778471) internal successors, (3491), 2564 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 3491 transitions. [2021-12-27 21:56:16,677 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 3491 transitions. Word has length 22 [2021-12-27 21:56:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,677 INFO L470 AbstractCegarLoop]: Abstraction has 2565 states and 3491 transitions. [2021-12-27 21:56:16,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 3491 transitions. [2021-12-27 21:56:16,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-27 21:56:16,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,680 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] [2021-12-27 21:56:16,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-27 21:56:16,680 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,680 INFO L85 PathProgramCache]: Analyzing trace with hash 243667590, now seen corresponding path program 1 times [2021-12-27 21:56:16,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874313667] [2021-12-27 21:56:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874313667] [2021-12-27 21:56:16,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874313667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981289019] [2021-12-27 21:56:16,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,703 INFO L87 Difference]: Start difference. First operand 2565 states and 3491 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,736 INFO L93 Difference]: Finished difference Result 5833 states and 7909 transitions. [2021-12-27 21:56:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-27 21:56:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,744 INFO L225 Difference]: With dead ends: 5833 [2021-12-27 21:56:16,744 INFO L226 Difference]: Without dead ends: 3335 [2021-12-27 21:56:16,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,747 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 37 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 135 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2021-12-27 21:56:16,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3333. [2021-12-27 21:56:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3332 states have (on average 1.3262304921968788) internal successors, (4419), 3332 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 4419 transitions. [2021-12-27 21:56:16,821 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 4419 transitions. Word has length 22 [2021-12-27 21:56:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,822 INFO L470 AbstractCegarLoop]: Abstraction has 3333 states and 4419 transitions. [2021-12-27 21:56:16,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 4419 transitions. [2021-12-27 21:56:16,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-27 21:56:16,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,824 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] [2021-12-27 21:56:16,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-27 21:56:16,824 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash -449217570, now seen corresponding path program 1 times [2021-12-27 21:56:16,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227914502] [2021-12-27 21:56:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227914502] [2021-12-27 21:56:16,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227914502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145930930] [2021-12-27 21:56:16,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,839 INFO L87 Difference]: Start difference. First operand 3333 states and 4419 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:16,874 INFO L93 Difference]: Finished difference Result 5001 states and 6597 transitions. [2021-12-27 21:56:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:16,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-27 21:56:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:16,882 INFO L225 Difference]: With dead ends: 5001 [2021-12-27 21:56:16,883 INFO L226 Difference]: Without dead ends: 3399 [2021-12-27 21:56:16,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,885 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 39 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:16,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 120 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3399 states. [2021-12-27 21:56:16,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3399 to 3397. [2021-12-27 21:56:16,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 1.3012367491166077) internal successors, (4419), 3396 states have internal predecessors, (4419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 4419 transitions. [2021-12-27 21:56:16,973 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 4419 transitions. Word has length 23 [2021-12-27 21:56:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:16,973 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 4419 transitions. [2021-12-27 21:56:16,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 4419 transitions. [2021-12-27 21:56:16,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-27 21:56:16,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:16,976 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] [2021-12-27 21:56:16,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-27 21:56:16,976 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:16,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1036023584, now seen corresponding path program 1 times [2021-12-27 21:56:16,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:16,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469401638] [2021-12-27 21:56:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:16,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:16,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:16,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469401638] [2021-12-27 21:56:16,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469401638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:16,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:16,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:16,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747975793] [2021-12-27 21:56:16,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:16,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:16,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:16,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:16,992 INFO L87 Difference]: Start difference. First operand 3397 states and 4419 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:17,049 INFO L93 Difference]: Finished difference Result 5641 states and 7365 transitions. [2021-12-27 21:56:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:17,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-27 21:56:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:17,064 INFO L225 Difference]: With dead ends: 5641 [2021-12-27 21:56:17,064 INFO L226 Difference]: Without dead ends: 5639 [2021-12-27 21:56:17,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:17,067 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 22 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:17,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 101 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5639 states. [2021-12-27 21:56:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5639 to 5125. [2021-12-27 21:56:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5124 states have (on average 1.2620999219359874) internal successors, (6467), 5124 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 6467 transitions. [2021-12-27 21:56:17,172 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 6467 transitions. Word has length 23 [2021-12-27 21:56:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:17,173 INFO L470 AbstractCegarLoop]: Abstraction has 5125 states and 6467 transitions. [2021-12-27 21:56:17,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 6467 transitions. [2021-12-27 21:56:17,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-27 21:56:17,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:17,178 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] [2021-12-27 21:56:17,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-27 21:56:17,179 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:17,179 INFO L85 PathProgramCache]: Analyzing trace with hash -777858146, now seen corresponding path program 1 times [2021-12-27 21:56:17,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:17,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686092942] [2021-12-27 21:56:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:17,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:17,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:17,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686092942] [2021-12-27 21:56:17,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686092942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:17,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:17,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:17,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131347326] [2021-12-27 21:56:17,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:17,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:17,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:17,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:17,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:17,195 INFO L87 Difference]: Start difference. First operand 5125 states and 6467 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:17,287 INFO L93 Difference]: Finished difference Result 11529 states and 14405 transitions. [2021-12-27 21:56:17,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:17,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-27 21:56:17,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:17,296 INFO L225 Difference]: With dead ends: 11529 [2021-12-27 21:56:17,296 INFO L226 Difference]: Without dead ends: 6535 [2021-12-27 21:56:17,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:17,301 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 36 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:17,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 136 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6535 states. [2021-12-27 21:56:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6535 to 6533. [2021-12-27 21:56:17,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6533 states, 6532 states have (on average 1.2154011022657685) internal successors, (7939), 6532 states have internal predecessors, (7939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 7939 transitions. [2021-12-27 21:56:17,424 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 7939 transitions. Word has length 23 [2021-12-27 21:56:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:17,424 INFO L470 AbstractCegarLoop]: Abstraction has 6533 states and 7939 transitions. [2021-12-27 21:56:17,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 7939 transitions. [2021-12-27 21:56:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 21:56:17,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:17,430 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] [2021-12-27 21:56:17,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-27 21:56:17,430 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:17,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:17,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2051743973, now seen corresponding path program 1 times [2021-12-27 21:56:17,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:17,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168945389] [2021-12-27 21:56:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:17,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:17,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:17,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168945389] [2021-12-27 21:56:17,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168945389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:17,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:17,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:17,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404524144] [2021-12-27 21:56:17,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:17,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:17,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:17,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:17,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:17,445 INFO L87 Difference]: Start difference. First operand 6533 states and 7939 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:17,541 INFO L93 Difference]: Finished difference Result 9801 states and 11845 transitions. [2021-12-27 21:56:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:17,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-27 21:56:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:17,550 INFO L225 Difference]: With dead ends: 9801 [2021-12-27 21:56:17,551 INFO L226 Difference]: Without dead ends: 6663 [2021-12-27 21:56:17,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:17,555 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 38 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:17,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 116 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6663 states. [2021-12-27 21:56:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6663 to 6661. [2021-12-27 21:56:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 1.1920420420420421) internal successors, (7939), 6660 states have internal predecessors, (7939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 7939 transitions. [2021-12-27 21:56:17,682 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 7939 transitions. Word has length 24 [2021-12-27 21:56:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:17,682 INFO L470 AbstractCegarLoop]: Abstraction has 6661 states and 7939 transitions. [2021-12-27 21:56:17,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 7939 transitions. [2021-12-27 21:56:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 21:56:17,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:17,688 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] [2021-12-27 21:56:17,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-27 21:56:17,689 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1656417309, now seen corresponding path program 1 times [2021-12-27 21:56:17,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:17,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359311288] [2021-12-27 21:56:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:17,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:17,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:17,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359311288] [2021-12-27 21:56:17,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359311288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:17,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:17,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:17,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321556570] [2021-12-27 21:56:17,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:17,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:17,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:17,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:17,704 INFO L87 Difference]: Start difference. First operand 6661 states and 7939 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:17,832 INFO L93 Difference]: Finished difference Result 10759 states and 12676 transitions. [2021-12-27 21:56:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:17,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-27 21:56:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:17,844 INFO L225 Difference]: With dead ends: 10759 [2021-12-27 21:56:17,844 INFO L226 Difference]: Without dead ends: 10757 [2021-12-27 21:56:17,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:17,846 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 18 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:17,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 98 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10757 states. [2021-12-27 21:56:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10757 to 10245. [2021-12-27 21:56:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10245 states, 10244 states have (on average 1.1623389301054277) internal successors, (11907), 10244 states have internal predecessors, (11907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 11907 transitions. [2021-12-27 21:56:17,993 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 11907 transitions. Word has length 24 [2021-12-27 21:56:17,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:17,993 INFO L470 AbstractCegarLoop]: Abstraction has 10245 states and 11907 transitions. [2021-12-27 21:56:17,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 11907 transitions. [2021-12-27 21:56:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-27 21:56:18,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:56:18,003 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] [2021-12-27 21:56:18,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-27 21:56:18,003 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:56:18,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:56:18,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1914582747, now seen corresponding path program 1 times [2021-12-27 21:56:18,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:56:18,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097990157] [2021-12-27 21:56:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:56:18,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:56:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:56:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:56:18,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:56:18,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097990157] [2021-12-27 21:56:18,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097990157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:56:18,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:56:18,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-27 21:56:18,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620533645] [2021-12-27 21:56:18,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:56:18,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-27 21:56:18,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:56:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-27 21:56:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:18,028 INFO L87 Difference]: Start difference. First operand 10245 states and 11907 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:56:18,197 INFO L93 Difference]: Finished difference Result 22789 states and 25987 transitions. [2021-12-27 21:56:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-27 21:56:18,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-27 21:56:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:56:18,197 INFO L225 Difference]: With dead ends: 22789 [2021-12-27 21:56:18,197 INFO L226 Difference]: Without dead ends: 0 [2021-12-27 21:56:18,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-27 21:56:18,210 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 34 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 21:56:18,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 135 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:56:18,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-27 21:56:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-27 21:56:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-27 21:56:18,213 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-12-27 21:56:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:56:18,214 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-27 21:56:18,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:56:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-27 21:56:18,214 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-27 21:56:18,218 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-27 21:56:18,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-27 21:56:18,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-27 21:56:18,230 INFO L858 garLoopResultBuilder]: For program point L126-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,231 INFO L858 garLoopResultBuilder]: For program point L102(line 102) no Hoare annotation was computed. [2021-12-27 21:56:18,231 INFO L858 garLoopResultBuilder]: For program point L127(line 127) no Hoare annotation was computed. [2021-12-27 21:56:18,231 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-27 21:56:18,231 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-27 21:56:18,231 INFO L858 garLoopResultBuilder]: For program point L111-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,231 INFO L858 garLoopResultBuilder]: For program point L136-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,231 INFO L858 garLoopResultBuilder]: For program point L95-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,231 INFO L858 garLoopResultBuilder]: For program point L87-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,232 INFO L858 garLoopResultBuilder]: For program point L112(line 112) no Hoare annotation was computed. [2021-12-27 21:56:18,232 INFO L858 garLoopResultBuilder]: For program point L79-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,232 INFO L858 garLoopResultBuilder]: For program point L137(line 137) no Hoare annotation was computed. [2021-12-27 21:56:18,232 INFO L858 garLoopResultBuilder]: For program point L71-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,232 INFO L858 garLoopResultBuilder]: For program point L63(lines 63 65) no Hoare annotation was computed. [2021-12-27 21:56:18,232 INFO L858 garLoopResultBuilder]: For program point L63-2(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,233 INFO L858 garLoopResultBuilder]: For program point L121-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,233 INFO L858 garLoopResultBuilder]: For program point L122(line 122) no Hoare annotation was computed. [2021-12-27 21:56:18,233 INFO L861 garLoopResultBuilder]: At program point L147(lines 7 151) the Hoare annotation is: true [2021-12-27 21:56:18,233 INFO L858 garLoopResultBuilder]: For program point L106-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,233 INFO L858 garLoopResultBuilder]: For program point L40(lines 40 42) no Hoare annotation was computed. [2021-12-27 21:56:18,233 INFO L858 garLoopResultBuilder]: For program point L131-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,233 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-27 21:56:18,233 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 149) no Hoare annotation was computed. [2021-12-27 21:56:18,234 INFO L858 garLoopResultBuilder]: For program point L107(line 107) no Hoare annotation was computed. [2021-12-27 21:56:18,234 INFO L858 garLoopResultBuilder]: For program point L132(line 132) no Hoare annotation was computed. [2021-12-27 21:56:18,234 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-27 21:56:18,234 INFO L858 garLoopResultBuilder]: For program point L91-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,234 INFO L858 garLoopResultBuilder]: For program point L116-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,234 INFO L858 garLoopResultBuilder]: For program point L83-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,234 INFO L861 garLoopResultBuilder]: At program point L141-1(lines 38 146) the Hoare annotation is: true [2021-12-27 21:56:18,234 INFO L858 garLoopResultBuilder]: For program point L75-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,234 INFO L858 garLoopResultBuilder]: For program point L67-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,235 INFO L861 garLoopResultBuilder]: At program point L150(lines 6 151) the Hoare annotation is: true [2021-12-27 21:56:18,235 INFO L858 garLoopResultBuilder]: For program point L117(line 117) no Hoare annotation was computed. [2021-12-27 21:56:18,235 INFO L858 garLoopResultBuilder]: For program point L142(line 142) no Hoare annotation was computed. [2021-12-27 21:56:18,235 INFO L854 garLoopResultBuilder]: At program point L142-1(lines 7 151) the Hoare annotation is: false [2021-12-27 21:56:18,235 INFO L858 garLoopResultBuilder]: For program point L101-1(lines 38 146) no Hoare annotation was computed. [2021-12-27 21:56:18,240 INFO L732 BasicCegarLoop]: Path program 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] [2021-12-27 21:56:18,241 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-27 21:56:18,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 09:56:18 BoogieIcfgContainer [2021-12-27 21:56:18,248 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-27 21:56:18,248 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-27 21:56:18,249 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-27 21:56:18,249 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-27 21:56:18,249 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:56:15" (3/4) ... [2021-12-27 21:56:18,251 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-27 21:56:18,261 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-12-27 21:56:18,262 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-27 21:56:18,262 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-27 21:56:18,262 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-27 21:56:18,292 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-27 21:56:18,293 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-27 21:56:18,293 INFO L158 Benchmark]: Toolchain (without parser) took 3785.42ms. Allocated memory was 52.4MB in the beginning and 369.1MB in the end (delta: 316.7MB). Free memory was 29.6MB in the beginning and 235.5MB in the end (delta: -205.9MB). Peak memory consumption was 110.1MB. Max. memory is 16.1GB. [2021-12-27 21:56:18,293 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 52.4MB. Free memory was 34.6MB in the beginning and 34.5MB in the end (delta: 34.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 21:56:18,293 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.27ms. Allocated memory was 52.4MB in the beginning and 71.3MB in the end (delta: 18.9MB). Free memory was 29.4MB in the beginning and 54.5MB in the end (delta: -25.0MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2021-12-27 21:56:18,294 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.34ms. Allocated memory is still 71.3MB. Free memory was 54.3MB in the beginning and 52.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 21:56:18,294 INFO L158 Benchmark]: Boogie Preprocessor took 31.45ms. Allocated memory is still 71.3MB. Free memory was 52.6MB in the beginning and 51.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 21:56:18,294 INFO L158 Benchmark]: RCFGBuilder took 331.37ms. Allocated memory is still 71.3MB. Free memory was 51.3MB in the beginning and 39.4MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-27 21:56:18,295 INFO L158 Benchmark]: TraceAbstraction took 3136.88ms. Allocated memory was 71.3MB in the beginning and 369.1MB in the end (delta: 297.8MB). Free memory was 39.1MB in the beginning and 238.7MB in the end (delta: -199.6MB). Peak memory consumption was 98.4MB. Max. memory is 16.1GB. [2021-12-27 21:56:18,296 INFO L158 Benchmark]: Witness Printer took 44.20ms. Allocated memory is still 369.1MB. Free memory was 238.7MB in the beginning and 235.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-27 21:56:18,302 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 52.4MB. Free memory was 34.6MB in the beginning and 34.5MB in the end (delta: 34.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 201.27ms. Allocated memory was 52.4MB in the beginning and 71.3MB in the end (delta: 18.9MB). Free memory was 29.4MB in the beginning and 54.5MB in the end (delta: -25.0MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.34ms. Allocated memory is still 71.3MB. Free memory was 54.3MB in the beginning and 52.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.45ms. Allocated memory is still 71.3MB. Free memory was 52.6MB in the beginning and 51.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 331.37ms. Allocated memory is still 71.3MB. Free memory was 51.3MB in the beginning and 39.4MB in the end (delta: 11.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3136.88ms. Allocated memory was 71.3MB in the beginning and 369.1MB in the end (delta: 297.8MB). Free memory was 39.1MB in the beginning and 238.7MB in the end (delta: -199.6MB). Peak memory consumption was 98.4MB. Max. memory is 16.1GB. * Witness Printer took 44.20ms. Allocated memory is still 369.1MB. Free memory was 238.7MB in the beginning and 235.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 149]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.1s, OverallIterations: 25, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 922 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 922 mSDsluCounter, 3098 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1232 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 133 IncrementalHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 1866 mSDtfsCounter, 133 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10245occurred in iteration=24, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 521 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 505 NumberOfCodeBlocks, 505 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 480 ConstructedInterpolants, 0 QuantifiedInterpolants, 1011 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2021-12-27 21:56:18,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE