./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/toy.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/systemc/toy.cil.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 4a8eabec1830ab654b41f6937ec2f9359cd3dd371ede66eafc352bac48edda3b --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 11:12:48,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 11:12:48,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 11:12:48,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 11:12:48,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 11:12:48,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 11:12:48,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 11:12:48,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 11:12:48,499 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 11:12:48,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 11:12:48,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 11:12:48,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 11:12:48,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 11:12:48,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 11:12:48,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 11:12:48,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 11:12:48,516 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 11:12:48,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 11:12:48,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 11:12:48,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 11:12:48,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 11:12:48,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 11:12:48,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 11:12:48,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 11:12:48,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 11:12:48,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 11:12:48,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 11:12:48,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 11:12:48,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 11:12:48,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 11:12:48,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 11:12:48,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 11:12:48,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 11:12:48,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 11:12:48,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 11:12:48,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 11:12:48,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 11:12:48,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 11:12:48,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 11:12:48,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 11:12:48,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 11:12:48,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 11:12:48,574 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 11:12:48,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 11:12:48,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 11:12:48,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 11:12:48,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 11:12:48,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 11:12:48,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 11:12:48,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 11:12:48,577 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 11:12:48,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 11:12:48,578 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 11:12:48,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 11:12:48,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 11:12:48,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 11:12:48,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 11:12:48,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 11:12:48,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 11:12:48,579 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 11:12:48,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 11:12:48,579 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 11:12:48,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 11:12:48,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 11:12:48,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 11:12:48,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 11:12:48,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:12:48,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 11:12:48,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 11:12:48,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 11:12:48,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 11:12:48,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 11:12:48,581 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 11:12:48,581 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 11:12:48,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 11:12:48,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 11:12:48,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a8eabec1830ab654b41f6937ec2f9359cd3dd371ede66eafc352bac48edda3b [2021-12-15 11:12:48,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 11:12:48,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 11:12:48,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 11:12:48,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 11:12:48,832 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 11:12:48,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/toy.cil.c [2021-12-15 11:12:48,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29d248fff/0348f76d9ccc4b7dbcfa8869ebd2c399/FLAG12aa101e7 [2021-12-15 11:12:49,359 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 11:12:49,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/toy.cil.c [2021-12-15 11:12:49,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29d248fff/0348f76d9ccc4b7dbcfa8869ebd2c399/FLAG12aa101e7 [2021-12-15 11:12:49,740 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29d248fff/0348f76d9ccc4b7dbcfa8869ebd2c399 [2021-12-15 11:12:49,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 11:12:49,745 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 11:12:49,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 11:12:49,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 11:12:49,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 11:12:49,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:12:49" (1/1) ... [2021-12-15 11:12:49,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c83c99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:49, skipping insertion in model container [2021-12-15 11:12:49,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:12:49" (1/1) ... [2021-12-15 11:12:49,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 11:12:49,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 11:12:49,950 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/systemc/toy.cil.c[697,710] [2021-12-15 11:12:50,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:12:50,035 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 11:12:50,043 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/systemc/toy.cil.c[697,710] [2021-12-15 11:12:50,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 11:12:50,079 INFO L208 MainTranslator]: Completed translation [2021-12-15 11:12:50,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50 WrapperNode [2021-12-15 11:12:50,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 11:12:50,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 11:12:50,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 11:12:50,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 11:12:50,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50" (1/1) ... [2021-12-15 11:12:50,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50" (1/1) ... [2021-12-15 11:12:50,125 INFO L137 Inliner]: procedures = 20, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 362 [2021-12-15 11:12:50,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 11:12:50,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 11:12:50,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 11:12:50,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 11:12:50,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50" (1/1) ... [2021-12-15 11:12:50,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50" (1/1) ... [2021-12-15 11:12:50,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50" (1/1) ... [2021-12-15 11:12:50,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50" (1/1) ... [2021-12-15 11:12:50,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50" (1/1) ... [2021-12-15 11:12:50,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50" (1/1) ... [2021-12-15 11:12:50,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50" (1/1) ... [2021-12-15 11:12:50,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 11:12:50,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 11:12:50,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 11:12:50,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 11:12:50,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50" (1/1) ... [2021-12-15 11:12:50,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 11:12:50,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:12:50,213 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 11:12:50,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 11:12:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 11:12:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 11:12:50,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 11:12:50,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 11:12:50,381 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 11:12:50,383 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 11:12:50,781 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 11:12:50,788 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 11:12:50,788 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-15 11:12:50,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:12:50 BoogieIcfgContainer [2021-12-15 11:12:50,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 11:12:50,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 11:12:50,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 11:12:50,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 11:12:50,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:12:49" (1/3) ... [2021-12-15 11:12:50,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b28ba4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:12:50, skipping insertion in model container [2021-12-15 11:12:50,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:12:50" (2/3) ... [2021-12-15 11:12:50,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b28ba4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:12:50, skipping insertion in model container [2021-12-15 11:12:50,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:12:50" (3/3) ... [2021-12-15 11:12:50,796 INFO L111 eAbstractionObserver]: Analyzing ICFG toy.cil.c [2021-12-15 11:12:50,800 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 11:12:50,800 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 11:12:50,851 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 11:12:50,860 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 11:12:50,860 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 11:12:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 130 states have (on average 1.8384615384615384) internal successors, (239), 131 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:50,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:50,896 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:50,897 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:50,901 INFO L85 PathProgramCache]: Analyzing trace with hash -895776564, now seen corresponding path program 1 times [2021-12-15 11:12:50,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:50,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209328527] [2021-12-15 11:12:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:50,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:51,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:51,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209328527] [2021-12-15 11:12:51,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209328527] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:51,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:51,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:51,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539304061] [2021-12-15 11:12:51,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:51,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:51,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:51,155 INFO L87 Difference]: Start difference. First operand has 132 states, 130 states have (on average 1.8384615384615384) internal successors, (239), 131 states have internal predecessors, (239), 0 states have call successors, (0), 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 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:51,217 INFO L93 Difference]: Finished difference Result 255 states and 464 transitions. [2021-12-15 11:12:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:51,231 INFO L225 Difference]: With dead ends: 255 [2021-12-15 11:12:51,232 INFO L226 Difference]: Without dead ends: 127 [2021-12-15 11:12:51,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:51,239 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 219 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:51,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 223 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:51,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-15 11:12:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-12-15 11:12:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.746031746031746) internal successors, (220), 126 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 220 transitions. [2021-12-15 11:12:51,293 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 220 transitions. Word has length 36 [2021-12-15 11:12:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:51,294 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 220 transitions. [2021-12-15 11:12:51,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 220 transitions. [2021-12-15 11:12:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:51,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:51,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:51,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 11:12:51,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:51,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1597376438, now seen corresponding path program 1 times [2021-12-15 11:12:51,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:51,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518004334] [2021-12-15 11:12:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:51,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:51,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:51,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518004334] [2021-12-15 11:12:51,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518004334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:51,376 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:51,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:51,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375799042] [2021-12-15 11:12:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:51,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:51,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:51,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:51,380 INFO L87 Difference]: Start difference. First operand 127 states and 220 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:51,426 INFO L93 Difference]: Finished difference Result 343 states and 592 transitions. [2021-12-15 11:12:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:12:51,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:51,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:51,428 INFO L225 Difference]: With dead ends: 343 [2021-12-15 11:12:51,428 INFO L226 Difference]: Without dead ends: 219 [2021-12-15 11:12:51,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:51,430 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 574 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:51,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 370 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-15 11:12:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2021-12-15 11:12:51,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.7255813953488373) internal successors, (371), 215 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 371 transitions. [2021-12-15 11:12:51,454 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 371 transitions. Word has length 36 [2021-12-15 11:12:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:51,455 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 371 transitions. [2021-12-15 11:12:51,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 371 transitions. [2021-12-15 11:12:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:51,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:51,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:51,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 11:12:51,458 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:51,458 INFO L85 PathProgramCache]: Analyzing trace with hash -211173044, now seen corresponding path program 1 times [2021-12-15 11:12:51,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:51,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157196561] [2021-12-15 11:12:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:51,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:51,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:51,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157196561] [2021-12-15 11:12:51,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157196561] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:51,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:51,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:51,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047626216] [2021-12-15 11:12:51,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:51,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:51,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:51,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:51,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:51,496 INFO L87 Difference]: Start difference. First operand 216 states and 371 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:51,528 INFO L93 Difference]: Finished difference Result 423 states and 729 transitions. [2021-12-15 11:12:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:51,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:51,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:51,530 INFO L225 Difference]: With dead ends: 423 [2021-12-15 11:12:51,530 INFO L226 Difference]: Without dead ends: 216 [2021-12-15 11:12:51,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:51,533 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 189 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:51,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 203 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-15 11:12:51,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-12-15 11:12:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.669767441860465) internal successors, (359), 215 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 359 transitions. [2021-12-15 11:12:51,550 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 359 transitions. Word has length 36 [2021-12-15 11:12:51,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:51,551 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 359 transitions. [2021-12-15 11:12:51,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,551 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 359 transitions. [2021-12-15 11:12:51,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:51,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:51,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:51,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 11:12:51,553 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:51,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1741714488, now seen corresponding path program 1 times [2021-12-15 11:12:51,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:51,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209372136] [2021-12-15 11:12:51,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:51,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:51,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:51,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209372136] [2021-12-15 11:12:51,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209372136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:51,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:51,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:51,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489024233] [2021-12-15 11:12:51,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:51,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:51,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:51,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:51,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:51,592 INFO L87 Difference]: Start difference. First operand 216 states and 359 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:51,704 INFO L93 Difference]: Finished difference Result 589 states and 980 transitions. [2021-12-15 11:12:51,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:12:51,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:51,706 INFO L225 Difference]: With dead ends: 589 [2021-12-15 11:12:51,706 INFO L226 Difference]: Without dead ends: 383 [2021-12-15 11:12:51,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:51,708 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 369 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:51,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 458 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:12:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-15 11:12:51,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 216. [2021-12-15 11:12:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.655813953488372) internal successors, (356), 215 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 356 transitions. [2021-12-15 11:12:51,726 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 356 transitions. Word has length 36 [2021-12-15 11:12:51,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:51,726 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 356 transitions. [2021-12-15 11:12:51,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 356 transitions. [2021-12-15 11:12:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:51,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:51,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:51,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 11:12:51,728 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:51,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash 181513546, now seen corresponding path program 1 times [2021-12-15 11:12:51,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:51,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657674117] [2021-12-15 11:12:51,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:51,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:51,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657674117] [2021-12-15 11:12:51,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657674117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:51,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:51,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:51,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724603277] [2021-12-15 11:12:51,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:51,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:51,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:51,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:51,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:51,782 INFO L87 Difference]: Start difference. First operand 216 states and 356 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:51,868 INFO L93 Difference]: Finished difference Result 590 states and 974 transitions. [2021-12-15 11:12:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:12:51,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:51,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:51,871 INFO L225 Difference]: With dead ends: 590 [2021-12-15 11:12:51,876 INFO L226 Difference]: Without dead ends: 385 [2021-12-15 11:12:51,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:51,878 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 367 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:51,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 465 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:12:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-12-15 11:12:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 216. [2021-12-15 11:12:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.6418604651162791) internal successors, (353), 215 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 353 transitions. [2021-12-15 11:12:51,900 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 353 transitions. Word has length 36 [2021-12-15 11:12:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:51,901 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 353 transitions. [2021-12-15 11:12:51,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 353 transitions. [2021-12-15 11:12:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:51,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:51,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:51,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 11:12:51,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:51,904 INFO L85 PathProgramCache]: Analyzing trace with hash 243553160, now seen corresponding path program 1 times [2021-12-15 11:12:51,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:51,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348790803] [2021-12-15 11:12:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:51,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:51,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:51,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348790803] [2021-12-15 11:12:51,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348790803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:51,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:51,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:51,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86801697] [2021-12-15 11:12:51,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:51,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:51,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:51,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:51,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:51,935 INFO L87 Difference]: Start difference. First operand 216 states and 353 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:52,004 INFO L93 Difference]: Finished difference Result 604 states and 987 transitions. [2021-12-15 11:12:52,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:12:52,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:52,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:52,006 INFO L225 Difference]: With dead ends: 604 [2021-12-15 11:12:52,006 INFO L226 Difference]: Without dead ends: 400 [2021-12-15 11:12:52,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:52,009 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 373 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:52,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 473 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-15 11:12:52,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 222. [2021-12-15 11:12:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.6153846153846154) internal successors, (357), 221 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 357 transitions. [2021-12-15 11:12:52,031 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 357 transitions. Word has length 36 [2021-12-15 11:12:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:52,032 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 357 transitions. [2021-12-15 11:12:52,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,033 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 357 transitions. [2021-12-15 11:12:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:52,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:52,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:52,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 11:12:52,038 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:52,038 INFO L85 PathProgramCache]: Analyzing trace with hash 384101770, now seen corresponding path program 1 times [2021-12-15 11:12:52,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:52,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806541198] [2021-12-15 11:12:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:52,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:52,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:52,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806541198] [2021-12-15 11:12:52,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806541198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:52,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:52,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:52,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962358794] [2021-12-15 11:12:52,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:52,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:52,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:52,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:52,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:52,094 INFO L87 Difference]: Start difference. First operand 222 states and 357 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:52,182 INFO L93 Difference]: Finished difference Result 759 states and 1219 transitions. [2021-12-15 11:12:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:12:52,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:52,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:52,186 INFO L225 Difference]: With dead ends: 759 [2021-12-15 11:12:52,187 INFO L226 Difference]: Without dead ends: 550 [2021-12-15 11:12:52,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:52,189 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 369 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:52,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 569 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-12-15 11:12:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 365. [2021-12-15 11:12:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.598901098901099) internal successors, (582), 364 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 582 transitions. [2021-12-15 11:12:52,216 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 582 transitions. Word has length 36 [2021-12-15 11:12:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:52,216 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 582 transitions. [2021-12-15 11:12:52,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 582 transitions. [2021-12-15 11:12:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:52,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:52,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:52,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 11:12:52,219 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash 250088264, now seen corresponding path program 1 times [2021-12-15 11:12:52,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:52,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169750147] [2021-12-15 11:12:52,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:52,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:52,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:52,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169750147] [2021-12-15 11:12:52,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169750147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:52,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:52,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:52,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682696162] [2021-12-15 11:12:52,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:52,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:52,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:52,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:52,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:52,256 INFO L87 Difference]: Start difference. First operand 365 states and 582 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:52,292 INFO L93 Difference]: Finished difference Result 872 states and 1395 transitions. [2021-12-15 11:12:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:52,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:52,295 INFO L225 Difference]: With dead ends: 872 [2021-12-15 11:12:52,295 INFO L226 Difference]: Without dead ends: 531 [2021-12-15 11:12:52,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:52,297 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 177 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:52,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 342 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-15 11:12:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 529. [2021-12-15 11:12:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.5946969696969697) internal successors, (842), 528 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 842 transitions. [2021-12-15 11:12:52,320 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 842 transitions. Word has length 36 [2021-12-15 11:12:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:52,321 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 842 transitions. [2021-12-15 11:12:52,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 842 transitions. [2021-12-15 11:12:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:52,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:52,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:52,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 11:12:52,327 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:52,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1539793604, now seen corresponding path program 1 times [2021-12-15 11:12:52,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:52,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331356629] [2021-12-15 11:12:52,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:52,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:52,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:52,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331356629] [2021-12-15 11:12:52,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331356629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:52,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:52,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:52,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503673744] [2021-12-15 11:12:52,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:52,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:52,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:52,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:52,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:52,371 INFO L87 Difference]: Start difference. First operand 529 states and 842 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:52,445 INFO L93 Difference]: Finished difference Result 1347 states and 2145 transitions. [2021-12-15 11:12:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:12:52,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:52,449 INFO L225 Difference]: With dead ends: 1347 [2021-12-15 11:12:52,449 INFO L226 Difference]: Without dead ends: 835 [2021-12-15 11:12:52,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:52,450 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 484 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:52,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 330 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-12-15 11:12:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 529. [2021-12-15 11:12:52,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.5795454545454546) internal successors, (834), 528 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 834 transitions. [2021-12-15 11:12:52,476 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 834 transitions. Word has length 36 [2021-12-15 11:12:52,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:52,476 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 834 transitions. [2021-12-15 11:12:52,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 834 transitions. [2021-12-15 11:12:52,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:52,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:52,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:52,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 11:12:52,478 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:52,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:52,478 INFO L85 PathProgramCache]: Analyzing trace with hash -48554298, now seen corresponding path program 1 times [2021-12-15 11:12:52,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:52,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136603185] [2021-12-15 11:12:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:52,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:52,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:52,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136603185] [2021-12-15 11:12:52,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136603185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:52,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:52,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:52,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349815893] [2021-12-15 11:12:52,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:52,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:52,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:52,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:52,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:52,505 INFO L87 Difference]: Start difference. First operand 529 states and 834 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:52,578 INFO L93 Difference]: Finished difference Result 1347 states and 2122 transitions. [2021-12-15 11:12:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:12:52,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:52,582 INFO L225 Difference]: With dead ends: 1347 [2021-12-15 11:12:52,582 INFO L226 Difference]: Without dead ends: 841 [2021-12-15 11:12:52,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:52,584 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 468 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:52,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 319 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:52,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-12-15 11:12:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 529. [2021-12-15 11:12:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.5643939393939394) internal successors, (826), 528 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 826 transitions. [2021-12-15 11:12:52,610 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 826 transitions. Word has length 36 [2021-12-15 11:12:52,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:52,610 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 826 transitions. [2021-12-15 11:12:52,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 826 transitions. [2021-12-15 11:12:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:52,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:52,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:52,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 11:12:52,612 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:52,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1328417976, now seen corresponding path program 1 times [2021-12-15 11:12:52,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:52,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926936574] [2021-12-15 11:12:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:52,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:52,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:52,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926936574] [2021-12-15 11:12:52,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926936574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:52,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:52,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:52,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213653485] [2021-12-15 11:12:52,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:52,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:52,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:52,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:52,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:52,643 INFO L87 Difference]: Start difference. First operand 529 states and 826 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:52,712 INFO L93 Difference]: Finished difference Result 1276 states and 1990 transitions. [2021-12-15 11:12:52,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 11:12:52,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:52,716 INFO L225 Difference]: With dead ends: 1276 [2021-12-15 11:12:52,716 INFO L226 Difference]: Without dead ends: 764 [2021-12-15 11:12:52,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:52,717 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 480 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:52,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 349 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-12-15 11:12:52,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 577. [2021-12-15 11:12:52,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.5329861111111112) internal successors, (883), 576 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 883 transitions. [2021-12-15 11:12:52,743 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 883 transitions. Word has length 36 [2021-12-15 11:12:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:52,743 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 883 transitions. [2021-12-15 11:12:52,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 883 transitions. [2021-12-15 11:12:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 11:12:52,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:52,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:52,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 11:12:52,745 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1915223990, now seen corresponding path program 1 times [2021-12-15 11:12:52,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:52,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030736614] [2021-12-15 11:12:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:52,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:52,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:52,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030736614] [2021-12-15 11:12:52,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030736614] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:52,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:52,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:52,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615770047] [2021-12-15 11:12:52,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:52,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:52,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:52,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:52,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:52,767 INFO L87 Difference]: Start difference. First operand 577 states and 883 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:52,820 INFO L93 Difference]: Finished difference Result 1372 states and 2104 transitions. [2021-12-15 11:12:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:52,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-12-15 11:12:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:52,825 INFO L225 Difference]: With dead ends: 1372 [2021-12-15 11:12:52,825 INFO L226 Difference]: Without dead ends: 809 [2021-12-15 11:12:52,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:52,826 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 118 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:52,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 312 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-12-15 11:12:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 806. [2021-12-15 11:12:52,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 1.5142857142857142) internal successors, (1219), 805 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1219 transitions. [2021-12-15 11:12:52,859 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1219 transitions. Word has length 36 [2021-12-15 11:12:52,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:52,860 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1219 transitions. [2021-12-15 11:12:52,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,860 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1219 transitions. [2021-12-15 11:12:52,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 11:12:52,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:52,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:52,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 11:12:52,862 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:52,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1539863823, now seen corresponding path program 1 times [2021-12-15 11:12:52,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:52,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235682000] [2021-12-15 11:12:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:52,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:52,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:52,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235682000] [2021-12-15 11:12:52,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235682000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:52,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:52,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:52,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17714579] [2021-12-15 11:12:52,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:52,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:52,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:52,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:52,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:52,888 INFO L87 Difference]: Start difference. First operand 806 states and 1219 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:52,944 INFO L93 Difference]: Finished difference Result 1999 states and 3056 transitions. [2021-12-15 11:12:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:52,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 11:12:52,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:52,950 INFO L225 Difference]: With dead ends: 1999 [2021-12-15 11:12:52,950 INFO L226 Difference]: Without dead ends: 1220 [2021-12-15 11:12:52,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:52,952 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 81 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:52,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 414 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-12-15 11:12:53,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1218. [2021-12-15 11:12:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 1.5209531635168447) internal successors, (1851), 1217 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1851 transitions. [2021-12-15 11:12:53,007 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1851 transitions. Word has length 47 [2021-12-15 11:12:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:53,007 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1851 transitions. [2021-12-15 11:12:53,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1851 transitions. [2021-12-15 11:12:53,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-15 11:12:53,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:53,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:53,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 11:12:53,009 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:53,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:53,010 INFO L85 PathProgramCache]: Analyzing trace with hash 642470545, now seen corresponding path program 1 times [2021-12-15 11:12:53,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:53,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975288781] [2021-12-15 11:12:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:53,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 11:12:53,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:53,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975288781] [2021-12-15 11:12:53,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975288781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:53,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:53,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:53,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769598139] [2021-12-15 11:12:53,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:53,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:53,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:53,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:53,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:53,041 INFO L87 Difference]: Start difference. First operand 1218 states and 1851 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:53,098 INFO L93 Difference]: Finished difference Result 2387 states and 3643 transitions. [2021-12-15 11:12:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:53,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-15 11:12:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:53,103 INFO L225 Difference]: With dead ends: 2387 [2021-12-15 11:12:53,103 INFO L226 Difference]: Without dead ends: 1196 [2021-12-15 11:12:53,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:53,105 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 179 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:53,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 182 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:53,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-12-15 11:12:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1196. [2021-12-15 11:12:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 1195 states have (on average 1.5263598326359833) internal successors, (1824), 1195 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1824 transitions. [2021-12-15 11:12:53,154 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1824 transitions. Word has length 47 [2021-12-15 11:12:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:53,155 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 1824 transitions. [2021-12-15 11:12:53,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1824 transitions. [2021-12-15 11:12:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-15 11:12:53,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:53,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:53,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 11:12:53,156 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:53,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1991530956, now seen corresponding path program 1 times [2021-12-15 11:12:53,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:53,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253288550] [2021-12-15 11:12:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:53,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:53,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:53,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253288550] [2021-12-15 11:12:53,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253288550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:53,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:53,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:53,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176608990] [2021-12-15 11:12:53,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:53,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:53,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:53,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:53,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:53,193 INFO L87 Difference]: Start difference. First operand 1196 states and 1824 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:53,279 INFO L93 Difference]: Finished difference Result 3056 states and 4711 transitions. [2021-12-15 11:12:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:53,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 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 48 [2021-12-15 11:12:53,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:53,287 INFO L225 Difference]: With dead ends: 3056 [2021-12-15 11:12:53,287 INFO L226 Difference]: Without dead ends: 1887 [2021-12-15 11:12:53,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:53,291 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 82 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:53,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 322 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-12-15 11:12:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1885. [2021-12-15 11:12:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 1.5345010615711252) internal successors, (2891), 1884 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2891 transitions. [2021-12-15 11:12:53,375 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2891 transitions. Word has length 48 [2021-12-15 11:12:53,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:53,376 INFO L470 AbstractCegarLoop]: Abstraction has 1885 states and 2891 transitions. [2021-12-15 11:12:53,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2891 transitions. [2021-12-15 11:12:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 11:12:53,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:53,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:53,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 11:12:53,379 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:53,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:53,379 INFO L85 PathProgramCache]: Analyzing trace with hash 253027899, now seen corresponding path program 1 times [2021-12-15 11:12:53,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:53,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468282283] [2021-12-15 11:12:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:53,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:53,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:53,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468282283] [2021-12-15 11:12:53,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468282283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:53,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:53,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:53,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597311908] [2021-12-15 11:12:53,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:53,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:53,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:53,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:53,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:53,427 INFO L87 Difference]: Start difference. First operand 1885 states and 2891 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:53,568 INFO L93 Difference]: Finished difference Result 5076 states and 7877 transitions. [2021-12-15 11:12:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:53,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 49 [2021-12-15 11:12:53,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:53,580 INFO L225 Difference]: With dead ends: 5076 [2021-12-15 11:12:53,580 INFO L226 Difference]: Without dead ends: 3220 [2021-12-15 11:12:53,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:53,582 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 86 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:53,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 385 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:53,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-12-15 11:12:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3218. [2021-12-15 11:12:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3217 states have (on average 1.5461610195834627) internal successors, (4974), 3217 states have internal predecessors, (4974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 4974 transitions. [2021-12-15 11:12:53,731 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 4974 transitions. Word has length 49 [2021-12-15 11:12:53,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:53,731 INFO L470 AbstractCegarLoop]: Abstraction has 3218 states and 4974 transitions. [2021-12-15 11:12:53,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 4974 transitions. [2021-12-15 11:12:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-15 11:12:53,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:53,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:53,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 11:12:53,734 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash -644365379, now seen corresponding path program 1 times [2021-12-15 11:12:53,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:53,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620066339] [2021-12-15 11:12:53,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:53,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 11:12:53,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:53,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620066339] [2021-12-15 11:12:53,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620066339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:53,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:53,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:53,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418542151] [2021-12-15 11:12:53,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:53,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:53,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:53,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:53,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:53,755 INFO L87 Difference]: Start difference. First operand 3218 states and 4974 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:53,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:53,883 INFO L93 Difference]: Finished difference Result 6385 states and 9889 transitions. [2021-12-15 11:12:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:53,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 49 [2021-12-15 11:12:53,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:53,894 INFO L225 Difference]: With dead ends: 6385 [2021-12-15 11:12:53,894 INFO L226 Difference]: Without dead ends: 3196 [2021-12-15 11:12:53,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:53,898 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 176 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:53,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 181 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-12-15 11:12:54,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 3196. [2021-12-15 11:12:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3195 states have (on average 1.5486697965571206) internal successors, (4948), 3195 states have internal predecessors, (4948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:54,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 4948 transitions. [2021-12-15 11:12:54,060 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 4948 transitions. Word has length 49 [2021-12-15 11:12:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:54,060 INFO L470 AbstractCegarLoop]: Abstraction has 3196 states and 4948 transitions. [2021-12-15 11:12:54,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:54,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 4948 transitions. [2021-12-15 11:12:54,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-15 11:12:54,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:54,063 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:54,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 11:12:54,063 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:54,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1777423200, now seen corresponding path program 1 times [2021-12-15 11:12:54,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:54,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882548302] [2021-12-15 11:12:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:54,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:54,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:54,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882548302] [2021-12-15 11:12:54,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882548302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:54,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:54,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:54,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794076063] [2021-12-15 11:12:54,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:54,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:54,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:54,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:54,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:54,111 INFO L87 Difference]: Start difference. First operand 3196 states and 4948 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:54,382 INFO L93 Difference]: Finished difference Result 8133 states and 12621 transitions. [2021-12-15 11:12:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:12:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-12-15 11:12:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:54,397 INFO L225 Difference]: With dead ends: 8133 [2021-12-15 11:12:54,397 INFO L226 Difference]: Without dead ends: 4173 [2021-12-15 11:12:54,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:54,403 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 401 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:54,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 305 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 11:12:54,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2021-12-15 11:12:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 4173. [2021-12-15 11:12:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 1.537392138063279) internal successors, (6414), 4172 states have internal predecessors, (6414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:54,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 6414 transitions. [2021-12-15 11:12:54,645 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 6414 transitions. Word has length 50 [2021-12-15 11:12:54,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:54,645 INFO L470 AbstractCegarLoop]: Abstraction has 4173 states and 6414 transitions. [2021-12-15 11:12:54,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 6414 transitions. [2021-12-15 11:12:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-15 11:12:54,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:54,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:54,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 11:12:54,649 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1800183507, now seen corresponding path program 1 times [2021-12-15 11:12:54,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:54,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409725816] [2021-12-15 11:12:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:54,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:54,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:54,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409725816] [2021-12-15 11:12:54,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409725816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:54,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:54,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 11:12:54,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099550339] [2021-12-15 11:12:54,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:54,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 11:12:54,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:54,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 11:12:54,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:54,692 INFO L87 Difference]: Start difference. First operand 4173 states and 6414 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:55,000 INFO L93 Difference]: Finished difference Result 10612 states and 16218 transitions. [2021-12-15 11:12:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 11:12:55,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-15 11:12:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:55,025 INFO L225 Difference]: With dead ends: 10612 [2021-12-15 11:12:55,026 INFO L226 Difference]: Without dead ends: 6462 [2021-12-15 11:12:55,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 11:12:55,033 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 684 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:55,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 514 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2021-12-15 11:12:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 4868. [2021-12-15 11:12:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4868 states, 4867 states have (on average 1.5062666940620506) internal successors, (7331), 4867 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4868 states to 4868 states and 7331 transitions. [2021-12-15 11:12:55,283 INFO L78 Accepts]: Start accepts. Automaton has 4868 states and 7331 transitions. Word has length 56 [2021-12-15 11:12:55,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:55,283 INFO L470 AbstractCegarLoop]: Abstraction has 4868 states and 7331 transitions. [2021-12-15 11:12:55,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 4868 states and 7331 transitions. [2021-12-15 11:12:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-15 11:12:55,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:55,287 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:55,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 11:12:55,288 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:55,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:55,288 INFO L85 PathProgramCache]: Analyzing trace with hash 138410889, now seen corresponding path program 1 times [2021-12-15 11:12:55,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:55,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126707127] [2021-12-15 11:12:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:55,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:55,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:55,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126707127] [2021-12-15 11:12:55,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126707127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:55,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:55,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:55,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58193130] [2021-12-15 11:12:55,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:55,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:55,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:55,319 INFO L87 Difference]: Start difference. First operand 4868 states and 7331 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:55,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:55,523 INFO L93 Difference]: Finished difference Result 10083 states and 15152 transitions. [2021-12-15 11:12:55,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:55,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-15 11:12:55,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:55,538 INFO L225 Difference]: With dead ends: 10083 [2021-12-15 11:12:55,538 INFO L226 Difference]: Without dead ends: 5244 [2021-12-15 11:12:55,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:55,544 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 128 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:55,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 311 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5244 states. [2021-12-15 11:12:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5244 to 5212. [2021-12-15 11:12:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5212 states, 5211 states have (on average 1.459220878909998) internal successors, (7604), 5211 states have internal predecessors, (7604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5212 states to 5212 states and 7604 transitions. [2021-12-15 11:12:55,822 INFO L78 Accepts]: Start accepts. Automaton has 5212 states and 7604 transitions. Word has length 90 [2021-12-15 11:12:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:55,823 INFO L470 AbstractCegarLoop]: Abstraction has 5212 states and 7604 transitions. [2021-12-15 11:12:55,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5212 states and 7604 transitions. [2021-12-15 11:12:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-15 11:12:55,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:55,828 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:55,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 11:12:55,828 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:55,829 INFO L85 PathProgramCache]: Analyzing trace with hash -56607288, now seen corresponding path program 1 times [2021-12-15 11:12:55,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:55,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835646313] [2021-12-15 11:12:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:55,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:55,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:55,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835646313] [2021-12-15 11:12:55,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835646313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:55,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:55,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:55,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888487809] [2021-12-15 11:12:55,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:55,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:55,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:55,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:55,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:55,860 INFO L87 Difference]: Start difference. First operand 5212 states and 7604 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:56,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:56,132 INFO L93 Difference]: Finished difference Result 10937 states and 15918 transitions. [2021-12-15 11:12:56,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:56,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-15 11:12:56,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:56,143 INFO L225 Difference]: With dead ends: 10937 [2021-12-15 11:12:56,144 INFO L226 Difference]: Without dead ends: 5766 [2021-12-15 11:12:56,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:56,151 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 127 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:56,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 310 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2021-12-15 11:12:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5718. [2021-12-15 11:12:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5718 states, 5717 states have (on average 1.4131537519678152) internal successors, (8079), 5717 states have internal predecessors, (8079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:56,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 8079 transitions. [2021-12-15 11:12:56,418 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 8079 transitions. Word has length 91 [2021-12-15 11:12:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:56,418 INFO L470 AbstractCegarLoop]: Abstraction has 5718 states and 8079 transitions. [2021-12-15 11:12:56,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 8079 transitions. [2021-12-15 11:12:56,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 11:12:56,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:56,424 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:56,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 11:12:56,424 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:56,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:56,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1840400199, now seen corresponding path program 1 times [2021-12-15 11:12:56,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:56,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919055489] [2021-12-15 11:12:56,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:56,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 11:12:56,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919055489] [2021-12-15 11:12:56,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919055489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:56,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:56,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:56,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796278013] [2021-12-15 11:12:56,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:56,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:56,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:56,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:56,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:56,449 INFO L87 Difference]: Start difference. First operand 5718 states and 8079 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:56,665 INFO L93 Difference]: Finished difference Result 11756 states and 16622 transitions. [2021-12-15 11:12:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:56,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-15 11:12:56,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:56,678 INFO L225 Difference]: With dead ends: 11756 [2021-12-15 11:12:56,678 INFO L226 Difference]: Without dead ends: 6099 [2021-12-15 11:12:56,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:56,686 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 123 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:56,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 307 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6099 states. [2021-12-15 11:12:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6099 to 5484. [2021-12-15 11:12:56,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 1.3549151924129126) internal successors, (7429), 5483 states have internal predecessors, (7429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 7429 transitions. [2021-12-15 11:12:56,961 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 7429 transitions. Word has length 92 [2021-12-15 11:12:56,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:56,961 INFO L470 AbstractCegarLoop]: Abstraction has 5484 states and 7429 transitions. [2021-12-15 11:12:56,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 7429 transitions. [2021-12-15 11:12:56,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-15 11:12:56,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:56,966 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:56,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 11:12:56,967 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash -195529206, now seen corresponding path program 1 times [2021-12-15 11:12:56,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:56,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87438191] [2021-12-15 11:12:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:56,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 11:12:57,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:57,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87438191] [2021-12-15 11:12:57,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87438191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:57,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:57,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:57,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877647079] [2021-12-15 11:12:57,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:57,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:57,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:57,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:57,004 INFO L87 Difference]: Start difference. First operand 5484 states and 7429 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:57,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:57,279 INFO L93 Difference]: Finished difference Result 10260 states and 13825 transitions. [2021-12-15 11:12:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:12:57,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-15 11:12:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:57,289 INFO L225 Difference]: With dead ends: 10260 [2021-12-15 11:12:57,289 INFO L226 Difference]: Without dead ends: 5263 [2021-12-15 11:12:57,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:57,294 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 441 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:57,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 390 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5263 states. [2021-12-15 11:12:57,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5263 to 5149. [2021-12-15 11:12:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5149 states, 5148 states have (on average 1.3090520590520591) internal successors, (6739), 5148 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5149 states to 5149 states and 6739 transitions. [2021-12-15 11:12:57,563 INFO L78 Accepts]: Start accepts. Automaton has 5149 states and 6739 transitions. Word has length 93 [2021-12-15 11:12:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:57,563 INFO L470 AbstractCegarLoop]: Abstraction has 5149 states and 6739 transitions. [2021-12-15 11:12:57,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:57,564 INFO L276 IsEmpty]: Start isEmpty. Operand 5149 states and 6739 transitions. [2021-12-15 11:12:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-15 11:12:57,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:57,573 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:57,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 11:12:57,574 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:57,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:57,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1965826331, now seen corresponding path program 1 times [2021-12-15 11:12:57,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:57,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106937521] [2021-12-15 11:12:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:57,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 11:12:57,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:57,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106937521] [2021-12-15 11:12:57,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106937521] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:57,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:57,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:57,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740862605] [2021-12-15 11:12:57,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:57,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:57,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:57,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:57,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:57,603 INFO L87 Difference]: Start difference. First operand 5149 states and 6739 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:57,800 INFO L93 Difference]: Finished difference Result 9832 states and 12854 transitions. [2021-12-15 11:12:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:57,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-12-15 11:12:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:57,810 INFO L225 Difference]: With dead ends: 9832 [2021-12-15 11:12:57,810 INFO L226 Difference]: Without dead ends: 5095 [2021-12-15 11:12:57,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:57,815 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 34 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:57,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 301 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5095 states. [2021-12-15 11:12:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5095 to 5095. [2021-12-15 11:12:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5095 states, 5094 states have (on average 1.302120141342756) internal successors, (6633), 5094 states have internal predecessors, (6633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5095 states to 5095 states and 6633 transitions. [2021-12-15 11:12:58,106 INFO L78 Accepts]: Start accepts. Automaton has 5095 states and 6633 transitions. Word has length 122 [2021-12-15 11:12:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:58,106 INFO L470 AbstractCegarLoop]: Abstraction has 5095 states and 6633 transitions. [2021-12-15 11:12:58,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 5095 states and 6633 transitions. [2021-12-15 11:12:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-15 11:12:58,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:58,117 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:58,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 11:12:58,118 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:58,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1720762163, now seen corresponding path program 1 times [2021-12-15 11:12:58,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:58,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86963051] [2021-12-15 11:12:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:58,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 11:12:58,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:58,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86963051] [2021-12-15 11:12:58,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86963051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:58,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:58,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:58,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440041497] [2021-12-15 11:12:58,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:58,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:58,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:58,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:58,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:58,156 INFO L87 Difference]: Start difference. First operand 5095 states and 6633 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:58,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:58,419 INFO L93 Difference]: Finished difference Result 9065 states and 11821 transitions. [2021-12-15 11:12:58,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:12:58,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 135 [2021-12-15 11:12:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:58,431 INFO L225 Difference]: With dead ends: 9065 [2021-12-15 11:12:58,431 INFO L226 Difference]: Without dead ends: 5011 [2021-12-15 11:12:58,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:12:58,437 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 306 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:58,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 312 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:58,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-12-15 11:12:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 5009. [2021-12-15 11:12:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5009 states, 5008 states have (on average 1.279552715654952) internal successors, (6408), 5008 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5009 states to 5009 states and 6408 transitions. [2021-12-15 11:12:58,721 INFO L78 Accepts]: Start accepts. Automaton has 5009 states and 6408 transitions. Word has length 135 [2021-12-15 11:12:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:58,722 INFO L470 AbstractCegarLoop]: Abstraction has 5009 states and 6408 transitions. [2021-12-15 11:12:58,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5009 states and 6408 transitions. [2021-12-15 11:12:58,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-15 11:12:58,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:58,732 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:58,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 11:12:58,733 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:58,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1604483709, now seen corresponding path program 1 times [2021-12-15 11:12:58,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:58,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822932033] [2021-12-15 11:12:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:58,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-15 11:12:58,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:58,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822932033] [2021-12-15 11:12:58,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822932033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:58,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:58,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:58,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499120089] [2021-12-15 11:12:58,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:58,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:58,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:58,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:58,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:58,785 INFO L87 Difference]: Start difference. First operand 5009 states and 6408 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:59,061 INFO L93 Difference]: Finished difference Result 9599 states and 12268 transitions. [2021-12-15 11:12:59,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:59,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-15 11:12:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:59,071 INFO L225 Difference]: With dead ends: 9599 [2021-12-15 11:12:59,071 INFO L226 Difference]: Without dead ends: 5009 [2021-12-15 11:12:59,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:59,077 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 25 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:59,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 300 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:59,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2021-12-15 11:12:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 4969. [2021-12-15 11:12:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4969 states, 4968 states have (on average 1.2733494363929148) internal successors, (6326), 4968 states have internal predecessors, (6326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 6326 transitions. [2021-12-15 11:12:59,335 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 6326 transitions. Word has length 141 [2021-12-15 11:12:59,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:59,335 INFO L470 AbstractCegarLoop]: Abstraction has 4969 states and 6326 transitions. [2021-12-15 11:12:59,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:59,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 6326 transitions. [2021-12-15 11:12:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-15 11:12:59,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:59,342 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:59,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 11:12:59,342 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:59,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:59,344 INFO L85 PathProgramCache]: Analyzing trace with hash -371935883, now seen corresponding path program 1 times [2021-12-15 11:12:59,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:59,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21613630] [2021-12-15 11:12:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:59,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-15 11:12:59,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:59,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21613630] [2021-12-15 11:12:59,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21613630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:59,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:59,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:12:59,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087106044] [2021-12-15 11:12:59,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:59,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:12:59,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:12:59,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:59,378 INFO L87 Difference]: Start difference. First operand 4969 states and 6326 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:12:59,567 INFO L93 Difference]: Finished difference Result 9547 states and 12146 transitions. [2021-12-15 11:12:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:12:59,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-15 11:12:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:12:59,576 INFO L225 Difference]: With dead ends: 9547 [2021-12-15 11:12:59,576 INFO L226 Difference]: Without dead ends: 4978 [2021-12-15 11:12:59,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:12:59,581 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 21 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:12:59,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 299 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:12:59,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4978 states. [2021-12-15 11:12:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4978 to 4938. [2021-12-15 11:12:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4938 states, 4937 states have (on average 1.2667611910066843) internal successors, (6254), 4937 states have internal predecessors, (6254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 6254 transitions. [2021-12-15 11:12:59,783 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 6254 transitions. Word has length 141 [2021-12-15 11:12:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:12:59,784 INFO L470 AbstractCegarLoop]: Abstraction has 4938 states and 6254 transitions. [2021-12-15 11:12:59,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:12:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 6254 transitions. [2021-12-15 11:12:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-15 11:12:59,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:12:59,792 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:12:59,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-15 11:12:59,793 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:12:59,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:12:59,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1226586588, now seen corresponding path program 1 times [2021-12-15 11:12:59,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:12:59,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689809713] [2021-12-15 11:12:59,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:12:59,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:12:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:12:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-15 11:12:59,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:12:59,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689809713] [2021-12-15 11:12:59,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689809713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:12:59,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:12:59,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:12:59,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923395869] [2021-12-15 11:12:59,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:12:59,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:12:59,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:12:59,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:12:59,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:12:59,854 INFO L87 Difference]: Start difference. First operand 4938 states and 6254 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:00,047 INFO L93 Difference]: Finished difference Result 8060 states and 10251 transitions. [2021-12-15 11:13:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:13:00,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-12-15 11:13:00,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:00,054 INFO L225 Difference]: With dead ends: 8060 [2021-12-15 11:13:00,054 INFO L226 Difference]: Without dead ends: 3522 [2021-12-15 11:13:00,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:00,061 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 278 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:00,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 291 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:00,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2021-12-15 11:13:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 3520. [2021-12-15 11:13:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3519 states have (on average 1.2358624609263995) internal successors, (4349), 3519 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 4349 transitions. [2021-12-15 11:13:00,214 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 4349 transitions. Word has length 145 [2021-12-15 11:13:00,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:00,215 INFO L470 AbstractCegarLoop]: Abstraction has 3520 states and 4349 transitions. [2021-12-15 11:13:00,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 4349 transitions. [2021-12-15 11:13:00,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-15 11:13:00,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:00,220 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:00,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-15 11:13:00,220 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:00,221 INFO L85 PathProgramCache]: Analyzing trace with hash 546835114, now seen corresponding path program 1 times [2021-12-15 11:13:00,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:00,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967526407] [2021-12-15 11:13:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:00,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 11:13:00,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:00,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967526407] [2021-12-15 11:13:00,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967526407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:00,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:00,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:13:00,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392113463] [2021-12-15 11:13:00,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:00,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:13:00,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:00,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:13:00,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:13:00,271 INFO L87 Difference]: Start difference. First operand 3520 states and 4349 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:00,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:00,384 INFO L93 Difference]: Finished difference Result 5695 states and 7039 transitions. [2021-12-15 11:13:00,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:13:00,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-12-15 11:13:00,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:00,387 INFO L225 Difference]: With dead ends: 5695 [2021-12-15 11:13:00,387 INFO L226 Difference]: Without dead ends: 2256 [2021-12-15 11:13:00,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:00,389 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 282 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:00,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 284 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:00,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-12-15 11:13:00,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2254. [2021-12-15 11:13:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 1.2041722148246783) internal successors, (2713), 2253 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 2713 transitions. [2021-12-15 11:13:00,506 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 2713 transitions. Word has length 145 [2021-12-15 11:13:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:00,506 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 2713 transitions. [2021-12-15 11:13:00,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 2713 transitions. [2021-12-15 11:13:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-12-15 11:13:00,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:00,529 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:00,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-15 11:13:00,530 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:00,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1626731220, now seen corresponding path program 1 times [2021-12-15 11:13:00,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:00,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019624587] [2021-12-15 11:13:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:00,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 11:13:00,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:00,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019624587] [2021-12-15 11:13:00,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019624587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:00,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:00,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:00,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294124779] [2021-12-15 11:13:00,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:00,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:00,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:00,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:00,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:00,594 INFO L87 Difference]: Start difference. First operand 2254 states and 2713 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:00,684 INFO L93 Difference]: Finished difference Result 4070 states and 4934 transitions. [2021-12-15 11:13:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:13:00,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 184 [2021-12-15 11:13:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:00,688 INFO L225 Difference]: With dead ends: 4070 [2021-12-15 11:13:00,688 INFO L226 Difference]: Without dead ends: 2192 [2021-12-15 11:13:00,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:00,690 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 1 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:00,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 300 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2021-12-15 11:13:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2114. [2021-12-15 11:13:00,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.1902508282063418) internal successors, (2515), 2113 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 2515 transitions. [2021-12-15 11:13:00,780 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 2515 transitions. Word has length 184 [2021-12-15 11:13:00,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:00,780 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 2515 transitions. [2021-12-15 11:13:00,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:00,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 2515 transitions. [2021-12-15 11:13:00,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-15 11:13:00,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:00,782 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:00,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-15 11:13:00,783 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:00,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:00,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1822764650, now seen corresponding path program 1 times [2021-12-15 11:13:00,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:00,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354949038] [2021-12-15 11:13:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:00,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-15 11:13:00,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:00,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354949038] [2021-12-15 11:13:00,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354949038] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:00,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:00,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:00,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9544783] [2021-12-15 11:13:00,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:00,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:00,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:00,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:00,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:00,829 INFO L87 Difference]: Start difference. First operand 2114 states and 2515 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:00,945 INFO L93 Difference]: Finished difference Result 4533 states and 5432 transitions. [2021-12-15 11:13:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:13:00,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-12-15 11:13:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:00,950 INFO L225 Difference]: With dead ends: 4533 [2021-12-15 11:13:00,950 INFO L226 Difference]: Without dead ends: 2789 [2021-12-15 11:13:00,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:00,952 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 132 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:00,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 298 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-12-15 11:13:01,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2408. [2021-12-15 11:13:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 1.1761528874117158) internal successors, (2831), 2407 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 2831 transitions. [2021-12-15 11:13:01,060 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 2831 transitions. Word has length 191 [2021-12-15 11:13:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:01,060 INFO L470 AbstractCegarLoop]: Abstraction has 2408 states and 2831 transitions. [2021-12-15 11:13:01,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 2831 transitions. [2021-12-15 11:13:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-15 11:13:01,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:01,063 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:01,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-15 11:13:01,063 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash 377236115, now seen corresponding path program 1 times [2021-12-15 11:13:01,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:01,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098712542] [2021-12-15 11:13:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:01,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 11:13:01,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:01,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098712542] [2021-12-15 11:13:01,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098712542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 11:13:01,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690831500] [2021-12-15 11:13:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:01,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 11:13:01,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 11:13:01,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 11:13:01,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 11:13:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-15 11:13:01,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 11:13:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 11:13:02,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 11:13:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 85 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 11:13:02,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690831500] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 11:13:02,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 11:13:02,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 27 [2021-12-15 11:13:02,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340928265] [2021-12-15 11:13:02,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 11:13:02,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-15 11:13:02,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-15 11:13:02,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-12-15 11:13:02,675 INFO L87 Difference]: Start difference. First operand 2408 states and 2831 transitions. Second operand has 27 states, 27 states have (on average 17.51851851851852) internal successors, (473), 27 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:04,820 INFO L93 Difference]: Finished difference Result 9992 states and 11725 transitions. [2021-12-15 11:13:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-15 11:13:04,821 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 17.51851851851852) internal successors, (473), 27 states have internal predecessors, (473), 0 states have call successors, (0), 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 194 [2021-12-15 11:13:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:04,832 INFO L225 Difference]: With dead ends: 9992 [2021-12-15 11:13:04,832 INFO L226 Difference]: Without dead ends: 7941 [2021-12-15 11:13:04,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=745, Invalid=5735, Unknown=0, NotChecked=0, Total=6480 [2021-12-15 11:13:04,837 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 3720 mSDsluCounter, 10174 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3720 SdHoareTripleChecker+Valid, 10776 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:04,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3720 Valid, 10776 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 11:13:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7941 states. [2021-12-15 11:13:05,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7941 to 3429. [2021-12-15 11:13:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 1.175029171528588) internal successors, (4028), 3428 states have internal predecessors, (4028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 4028 transitions. [2021-12-15 11:13:05,016 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 4028 transitions. Word has length 194 [2021-12-15 11:13:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:05,017 INFO L470 AbstractCegarLoop]: Abstraction has 3429 states and 4028 transitions. [2021-12-15 11:13:05,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 17.51851851851852) internal successors, (473), 27 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 4028 transitions. [2021-12-15 11:13:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-15 11:13:05,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:05,020 INFO L514 BasicCegarLoop]: trace histogram [9, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:05,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 11:13:05,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-15 11:13:05,221 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:05,221 INFO L85 PathProgramCache]: Analyzing trace with hash -714863608, now seen corresponding path program 1 times [2021-12-15 11:13:05,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:05,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142696968] [2021-12-15 11:13:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:05,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-15 11:13:05,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:05,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142696968] [2021-12-15 11:13:05,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142696968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:05,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:05,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:05,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74157974] [2021-12-15 11:13:05,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:05,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:05,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:05,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:05,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:05,310 INFO L87 Difference]: Start difference. First operand 3429 states and 4028 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:05,451 INFO L93 Difference]: Finished difference Result 5329 states and 6235 transitions. [2021-12-15 11:13:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:13:05,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 263 [2021-12-15 11:13:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:05,454 INFO L225 Difference]: With dead ends: 5329 [2021-12-15 11:13:05,454 INFO L226 Difference]: Without dead ends: 2305 [2021-12-15 11:13:05,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:05,457 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 3 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:05,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 314 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-12-15 11:13:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 2272. [2021-12-15 11:13:05,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 1.1501541171290182) internal successors, (2612), 2271 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2612 transitions. [2021-12-15 11:13:05,546 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2612 transitions. Word has length 263 [2021-12-15 11:13:05,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:05,546 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 2612 transitions. [2021-12-15 11:13:05,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2612 transitions. [2021-12-15 11:13:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-15 11:13:05,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:05,549 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:05,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-15 11:13:05,549 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:05,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1759293355, now seen corresponding path program 1 times [2021-12-15 11:13:05,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:05,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716776298] [2021-12-15 11:13:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:05,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-15 11:13:05,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:05,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716776298] [2021-12-15 11:13:05,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716776298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:05,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:05,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 11:13:05,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678733373] [2021-12-15 11:13:05,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:05,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 11:13:05,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:05,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 11:13:05,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 11:13:05,599 INFO L87 Difference]: Start difference. First operand 2272 states and 2612 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:05,713 INFO L93 Difference]: Finished difference Result 4253 states and 4901 transitions. [2021-12-15 11:13:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 11:13:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 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 271 [2021-12-15 11:13:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:05,716 INFO L225 Difference]: With dead ends: 4253 [2021-12-15 11:13:05,716 INFO L226 Difference]: Without dead ends: 2273 [2021-12-15 11:13:05,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 11:13:05,718 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 191 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:05,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 225 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-12-15 11:13:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2272. [2021-12-15 11:13:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 1.141347424042272) internal successors, (2592), 2271 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2592 transitions. [2021-12-15 11:13:05,790 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2592 transitions. Word has length 271 [2021-12-15 11:13:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:05,790 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 2592 transitions. [2021-12-15 11:13:05,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2592 transitions. [2021-12-15 11:13:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-12-15 11:13:05,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:05,792 INFO L514 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:05,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-15 11:13:05,792 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:05,793 INFO L85 PathProgramCache]: Analyzing trace with hash 550996924, now seen corresponding path program 1 times [2021-12-15 11:13:05,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:05,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165236298] [2021-12-15 11:13:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:05,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-15 11:13:05,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:05,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165236298] [2021-12-15 11:13:05,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165236298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:05,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:05,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:05,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328764048] [2021-12-15 11:13:05,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:05,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:05,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:05,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:05,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:05,838 INFO L87 Difference]: Start difference. First operand 2272 states and 2592 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:05,890 INFO L93 Difference]: Finished difference Result 2676 states and 3041 transitions. [2021-12-15 11:13:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:13:05,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 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 273 [2021-12-15 11:13:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:05,892 INFO L225 Difference]: With dead ends: 2676 [2021-12-15 11:13:05,892 INFO L226 Difference]: Without dead ends: 809 [2021-12-15 11:13:05,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:05,894 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 28 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:05,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 302 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2021-12-15 11:13:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 809. [2021-12-15 11:13:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.103960396039604) internal successors, (892), 808 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 892 transitions. [2021-12-15 11:13:05,965 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 892 transitions. Word has length 273 [2021-12-15 11:13:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:05,965 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 892 transitions. [2021-12-15 11:13:05,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 892 transitions. [2021-12-15 11:13:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-12-15 11:13:05,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 11:13:05,967 INFO L514 BasicCegarLoop]: trace histogram [9, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 11:13:05,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-15 11:13:05,968 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 11:13:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 11:13:05,968 INFO L85 PathProgramCache]: Analyzing trace with hash 249689584, now seen corresponding path program 1 times [2021-12-15 11:13:05,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 11:13:05,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058578721] [2021-12-15 11:13:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 11:13:05,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 11:13:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 11:13:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-12-15 11:13:06,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 11:13:06,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058578721] [2021-12-15 11:13:06,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058578721] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 11:13:06,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 11:13:06,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 11:13:06,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999595323] [2021-12-15 11:13:06,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 11:13:06,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 11:13:06,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 11:13:06,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 11:13:06,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:06,014 INFO L87 Difference]: Start difference. First operand 809 states and 892 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 11:13:06,063 INFO L93 Difference]: Finished difference Result 1090 states and 1202 transitions. [2021-12-15 11:13:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 11:13:06,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 290 [2021-12-15 11:13:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 11:13:06,064 INFO L225 Difference]: With dead ends: 1090 [2021-12-15 11:13:06,064 INFO L226 Difference]: Without dead ends: 0 [2021-12-15 11:13:06,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 11:13:06,066 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 3 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 11:13:06,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 283 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 11:13:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-15 11:13:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-15 11:13:06,067 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) [2021-12-15 11:13:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-15 11:13:06,067 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 290 [2021-12-15 11:13:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 11:13:06,067 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-15 11:13:06,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 11:13:06,068 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-15 11:13:06,068 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-15 11:13:06,070 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 11:13:06,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-15 11:13:06,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-15 11:13:26,355 WARN L227 SmtUtils]: Spent 15.48s on a formula simplification. DAG size of input: 226 DAG size of output: 226 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)