./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.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 d9bb0fb3fb89b50a98609e7d92154455ef985195351d080b4795952eedc79161 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 20:55:08,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 20:55:08,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 20:55:08,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 20:55:08,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 20:55:08,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 20:55:08,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 20:55:08,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 20:55:08,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 20:55:08,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 20:55:08,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 20:55:08,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 20:55:08,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 20:55:08,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 20:55:08,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 20:55:08,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 20:55:08,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 20:55:08,579 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 20:55:08,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 20:55:08,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 20:55:08,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 20:55:08,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 20:55:08,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 20:55:08,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 20:55:08,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 20:55:08,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 20:55:08,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 20:55:08,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 20:55:08,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 20:55:08,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 20:55:08,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 20:55:08,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 20:55:08,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 20:55:08,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 20:55:08,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 20:55:08,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 20:55:08,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 20:55:08,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 20:55:08,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 20:55:08,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 20:55:08,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 20:55:08,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 20:55:08,633 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 20:55:08,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 20:55:08,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 20:55:08,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 20:55:08,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 20:55:08,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 20:55:08,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 20:55:08,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 20:55:08,635 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 20:55:08,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 20:55:08,636 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 20:55:08,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 20:55:08,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 20:55:08,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 20:55:08,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 20:55:08,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 20:55:08,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 20:55:08,637 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 20:55:08,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 20:55:08,637 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 20:55:08,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 20:55:08,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 20:55:08,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 20:55:08,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 20:55:08,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:55:08,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 20:55:08,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 20:55:08,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 20:55:08,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 20:55:08,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 20:55:08,640 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 20:55:08,640 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 20:55:08,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 20:55:08,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 20:55:08,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9bb0fb3fb89b50a98609e7d92154455ef985195351d080b4795952eedc79161 [2021-12-17 20:55:08,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 20:55:08,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 20:55:08,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 20:55:08,869 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 20:55:08,869 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 20:55:08,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c [2021-12-17 20:55:08,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c7cecf3a/445a1cc71b4e4455985597039c8e7e41/FLAG53d8aa4a2 [2021-12-17 20:55:09,541 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 20:55:09,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c [2021-12-17 20:55:09,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c7cecf3a/445a1cc71b4e4455985597039c8e7e41/FLAG53d8aa4a2 [2021-12-17 20:55:09,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c7cecf3a/445a1cc71b4e4455985597039c8e7e41 [2021-12-17 20:55:09,982 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 20:55:09,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 20:55:09,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 20:55:09,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 20:55:09,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 20:55:09,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:55:09" (1/1) ... [2021-12-17 20:55:09,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d550c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:09, skipping insertion in model container [2021-12-17 20:55:09,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 08:55:09" (1/1) ... [2021-12-17 20:55:09,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 20:55:10,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 20:55:10,376 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[15482,15495] [2021-12-17 20:55:10,392 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[17357,17370] [2021-12-17 20:55:10,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:55:10,872 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 20:55:10,902 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[15482,15495] [2021-12-17 20:55:10,921 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c[17357,17370] [2021-12-17 20:55:11,214 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 20:55:11,233 INFO L208 MainTranslator]: Completed translation [2021-12-17 20:55:11,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11 WrapperNode [2021-12-17 20:55:11,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 20:55:11,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 20:55:11,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 20:55:11,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 20:55:11,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11" (1/1) ... [2021-12-17 20:55:11,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11" (1/1) ... [2021-12-17 20:55:11,508 INFO L137 Inliner]: procedures = 37, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5149 [2021-12-17 20:55:11,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 20:55:11,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 20:55:11,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 20:55:11,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 20:55:11,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11" (1/1) ... [2021-12-17 20:55:11,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11" (1/1) ... [2021-12-17 20:55:11,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11" (1/1) ... [2021-12-17 20:55:11,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11" (1/1) ... [2021-12-17 20:55:11,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11" (1/1) ... [2021-12-17 20:55:11,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11" (1/1) ... [2021-12-17 20:55:11,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11" (1/1) ... [2021-12-17 20:55:11,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 20:55:11,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 20:55:11,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 20:55:11,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 20:55:11,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11" (1/1) ... [2021-12-17 20:55:11,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 20:55:11,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 20:55:11,932 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) [2021-12-17 20:55:11,996 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 [2021-12-17 20:55:12,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 20:55:12,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 20:55:12,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 20:55:12,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 20:55:12,225 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 20:55:12,244 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 20:55:14,751 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 20:55:14,761 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 20:55:14,761 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-17 20:55:14,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:55:14 BoogieIcfgContainer [2021-12-17 20:55:14,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 20:55:14,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 20:55:14,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 20:55:14,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 20:55:14,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 08:55:09" (1/3) ... [2021-12-17 20:55:14,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4fdcba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:55:14, skipping insertion in model container [2021-12-17 20:55:14,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 08:55:11" (2/3) ... [2021-12-17 20:55:14,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c4fdcba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 08:55:14, skipping insertion in model container [2021-12-17 20:55:14,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 08:55:14" (3/3) ... [2021-12-17 20:55:14,769 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label00.c [2021-12-17 20:55:14,772 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 20:55:14,772 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 20:55:14,835 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 20:55:14,840 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 [2021-12-17 20:55:14,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 20:55:14,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:14,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 20:55:14,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:14,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:14,864 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:14,868 INFO L85 PathProgramCache]: Analyzing trace with hash -442194987, now seen corresponding path program 1 times [2021-12-17 20:55:14,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:14,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662747852] [2021-12-17 20:55:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:14,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:14,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662747852] [2021-12-17 20:55:14,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662747852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:14,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:14,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:55:14,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119250116] [2021-12-17 20:55:14,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:14,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:55:14,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:15,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:55:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:15,011 INFO L87 Difference]: Start difference. First operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:17,669 INFO L93 Difference]: Finished difference Result 2561 states and 4920 transitions. [2021-12-17 20:55:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:55:17,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-17 20:55:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:17,686 INFO L225 Difference]: With dead ends: 2561 [2021-12-17 20:55:17,686 INFO L226 Difference]: Without dead ends: 1611 [2021-12-17 20:55:17,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:17,693 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 1003 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:17,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1003 Valid, 667 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 20:55:17,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-12-17 20:55:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2021-12-17 20:55:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1609 states have (on average 1.6451211932877563) internal successors, (2647), 1610 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2647 transitions. [2021-12-17 20:55:17,760 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2647 transitions. Word has length 16 [2021-12-17 20:55:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:17,761 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 2647 transitions. [2021-12-17 20:55:17,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2647 transitions. [2021-12-17 20:55:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 20:55:17,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:17,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:17,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 20:55:17,763 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:17,812 INFO L85 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2021-12-17 20:55:17,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:17,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629281985] [2021-12-17 20:55:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:17,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:17,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:17,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629281985] [2021-12-17 20:55:17,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629281985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:17,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:17,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 20:55:17,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844220111] [2021-12-17 20:55:17,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:17,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 20:55:17,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:17,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 20:55:17,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:55:17,910 INFO L87 Difference]: Start difference. First operand 1611 states and 2647 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:17,969 INFO L93 Difference]: Finished difference Result 1675 states and 2746 transitions. [2021-12-17 20:55:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:55:17,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-17 20:55:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:17,974 INFO L225 Difference]: With dead ends: 1675 [2021-12-17 20:55:17,974 INFO L226 Difference]: Without dead ends: 1611 [2021-12-17 20:55:17,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 20:55:17,975 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 3 mSDsluCounter, 4811 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6429 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:17,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6429 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-12-17 20:55:17,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1611. [2021-12-17 20:55:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1609 states have (on average 1.620261031696706) internal successors, (2607), 1610 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2607 transitions. [2021-12-17 20:55:17,997 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2607 transitions. Word has length 38 [2021-12-17 20:55:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:17,998 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 2607 transitions. [2021-12-17 20:55:17,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2607 transitions. [2021-12-17 20:55:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 20:55:18,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:18,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:18,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 20:55:18,000 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2021-12-17 20:55:18,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:18,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305913498] [2021-12-17 20:55:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:18,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:18,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:18,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305913498] [2021-12-17 20:55:18,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305913498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:18,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:18,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:55:18,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457011925] [2021-12-17 20:55:18,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:18,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:55:18,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:18,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:55:18,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:18,069 INFO L87 Difference]: Start difference. First operand 1611 states and 2607 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:18,090 INFO L93 Difference]: Finished difference Result 1725 states and 2787 transitions. [2021-12-17 20:55:18,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:55:18,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-17 20:55:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:18,096 INFO L225 Difference]: With dead ends: 1725 [2021-12-17 20:55:18,096 INFO L226 Difference]: Without dead ends: 1665 [2021-12-17 20:55:18,096 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 [2021-12-17 20:55:18,097 INFO L933 BasicCegarLoop]: 1661 mSDtfsCounter, 1524 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:18,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1754 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-12-17 20:55:18,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1663. [2021-12-17 20:55:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1661 states have (on average 1.6195063214930765) internal successors, (2690), 1662 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2690 transitions. [2021-12-17 20:55:18,120 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2690 transitions. Word has length 77 [2021-12-17 20:55:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:18,120 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 2690 transitions. [2021-12-17 20:55:18,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2690 transitions. [2021-12-17 20:55:18,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 20:55:18,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:18,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:18,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 20:55:18,122 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:18,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:18,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2021-12-17 20:55:18,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:18,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302803360] [2021-12-17 20:55:18,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:18,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:18,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:18,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302803360] [2021-12-17 20:55:18,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302803360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:18,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:18,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:55:18,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593644913] [2021-12-17 20:55:18,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:18,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:55:18,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:18,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:55:18,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:18,172 INFO L87 Difference]: Start difference. First operand 1663 states and 2690 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:18,196 INFO L93 Difference]: Finished difference Result 1875 states and 3026 transitions. [2021-12-17 20:55:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:55:18,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-17 20:55:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:18,204 INFO L225 Difference]: With dead ends: 1875 [2021-12-17 20:55:18,204 INFO L226 Difference]: Without dead ends: 1763 [2021-12-17 20:55:18,205 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 [2021-12-17 20:55:18,206 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1504 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:18,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 1717 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-12-17 20:55:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1761. [2021-12-17 20:55:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1759 states have (on average 1.617396247868107) internal successors, (2845), 1760 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2845 transitions. [2021-12-17 20:55:18,236 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2845 transitions. Word has length 77 [2021-12-17 20:55:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:18,237 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 2845 transitions. [2021-12-17 20:55:18,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2845 transitions. [2021-12-17 20:55:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 20:55:18,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:18,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:18,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 20:55:18,239 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:18,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2021-12-17 20:55:18,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:18,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343498737] [2021-12-17 20:55:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:18,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:18,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:18,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343498737] [2021-12-17 20:55:18,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343498737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:18,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:18,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:55:18,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126035647] [2021-12-17 20:55:18,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:18,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:55:18,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:18,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:55:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:55:18,327 INFO L87 Difference]: Start difference. First operand 1761 states and 2845 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:18,564 INFO L93 Difference]: Finished difference Result 4281 states and 6841 transitions. [2021-12-17 20:55:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 20:55:18,564 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-17 20:55:18,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:18,578 INFO L225 Difference]: With dead ends: 4281 [2021-12-17 20:55:18,578 INFO L226 Difference]: Without dead ends: 4071 [2021-12-17 20:55:18,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-17 20:55:18,581 INFO L933 BasicCegarLoop]: 1574 mSDtfsCounter, 10491 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10491 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:18,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10491 Valid, 2765 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:55:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-12-17 20:55:18,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 1969. [2021-12-17 20:55:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1967 states have (on average 1.6110828673106252) internal successors, (3169), 1968 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 3169 transitions. [2021-12-17 20:55:18,635 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 3169 transitions. Word has length 77 [2021-12-17 20:55:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:18,638 INFO L470 AbstractCegarLoop]: Abstraction has 1969 states and 3169 transitions. [2021-12-17 20:55:18,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 3169 transitions. [2021-12-17 20:55:18,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 20:55:18,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:18,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:18,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 20:55:18,640 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:18,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:18,645 INFO L85 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2021-12-17 20:55:18,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:18,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113141510] [2021-12-17 20:55:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:18,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:18,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:18,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113141510] [2021-12-17 20:55:18,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113141510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:18,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:18,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:55:18,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145897158] [2021-12-17 20:55:18,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:18,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:55:18,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:18,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:55:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:18,736 INFO L87 Difference]: Start difference. First operand 1969 states and 3169 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:18,771 INFO L93 Difference]: Finished difference Result 2589 states and 4141 transitions. [2021-12-17 20:55:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:55:18,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-17 20:55:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:18,779 INFO L225 Difference]: With dead ends: 2589 [2021-12-17 20:55:18,779 INFO L226 Difference]: Without dead ends: 2171 [2021-12-17 20:55:18,780 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 [2021-12-17 20:55:18,782 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 1496 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:18,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1675 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-12-17 20:55:18,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2021-12-17 20:55:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2167 states have (on average 1.6045223811721274) internal successors, (3477), 2168 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3477 transitions. [2021-12-17 20:55:18,831 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3477 transitions. Word has length 79 [2021-12-17 20:55:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:18,832 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3477 transitions. [2021-12-17 20:55:18,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3477 transitions. [2021-12-17 20:55:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 20:55:18,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:18,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:18,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 20:55:18,834 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:18,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:18,835 INFO L85 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2021-12-17 20:55:18,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:18,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120180629] [2021-12-17 20:55:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:18,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:19,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:19,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120180629] [2021-12-17 20:55:19,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120180629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:19,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:19,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:55:19,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885134794] [2021-12-17 20:55:19,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:19,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:55:19,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:19,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:55:19,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:55:19,042 INFO L87 Difference]: Start difference. First operand 2169 states and 3477 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:19,288 INFO L93 Difference]: Finished difference Result 2787 states and 4441 transitions. [2021-12-17 20:55:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:55:19,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-17 20:55:19,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:19,294 INFO L225 Difference]: With dead ends: 2787 [2021-12-17 20:55:19,295 INFO L226 Difference]: Without dead ends: 2171 [2021-12-17 20:55:19,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-17 20:55:19,296 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 7775 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7775 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:19,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7775 Valid, 2058 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:19,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-12-17 20:55:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2169. [2021-12-17 20:55:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2167 states have (on average 1.6017535763728656) internal successors, (3471), 2168 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 3471 transitions. [2021-12-17 20:55:19,330 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 3471 transitions. Word has length 79 [2021-12-17 20:55:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:19,331 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 3471 transitions. [2021-12-17 20:55:19,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 3471 transitions. [2021-12-17 20:55:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 20:55:19,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:19,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:19,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 20:55:19,332 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2021-12-17 20:55:19,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:19,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294308210] [2021-12-17 20:55:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:19,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:19,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:19,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294308210] [2021-12-17 20:55:19,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294308210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:19,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:19,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:55:19,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387086076] [2021-12-17 20:55:19,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:19,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:55:19,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:19,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:55:19,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:19,359 INFO L87 Difference]: Start difference. First operand 2169 states and 3471 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:19,399 INFO L93 Difference]: Finished difference Result 3329 states and 5265 transitions. [2021-12-17 20:55:19,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:55:19,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-17 20:55:19,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:19,406 INFO L225 Difference]: With dead ends: 3329 [2021-12-17 20:55:19,406 INFO L226 Difference]: Without dead ends: 2713 [2021-12-17 20:55:19,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:19,408 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1508 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:19,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 1726 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:19,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-17 20:55:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-12-17 20:55:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2709 states have (on average 1.5854558877814693) internal successors, (4295), 2710 states have internal predecessors, (4295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 4295 transitions. [2021-12-17 20:55:19,458 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 4295 transitions. Word has length 79 [2021-12-17 20:55:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:19,458 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 4295 transitions. [2021-12-17 20:55:19,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 4295 transitions. [2021-12-17 20:55:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 20:55:19,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:19,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:19,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 20:55:19,460 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2021-12-17 20:55:19,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:19,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598914544] [2021-12-17 20:55:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:19,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:19,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:19,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598914544] [2021-12-17 20:55:19,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598914544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:19,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:19,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:55:19,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824307761] [2021-12-17 20:55:19,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:19,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:55:19,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:19,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:55:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:19,486 INFO L87 Difference]: Start difference. First operand 2711 states and 4295 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:19,545 INFO L93 Difference]: Finished difference Result 4883 states and 7617 transitions. [2021-12-17 20:55:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:55:19,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-17 20:55:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:19,556 INFO L225 Difference]: With dead ends: 4883 [2021-12-17 20:55:19,556 INFO L226 Difference]: Without dead ends: 3725 [2021-12-17 20:55:19,557 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 [2021-12-17 20:55:19,558 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 1512 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:19,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 1735 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3725 states. [2021-12-17 20:55:19,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3725 to 3723. [2021-12-17 20:55:19,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 3721 states have (on average 1.5616769685568395) internal successors, (5811), 3722 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 5811 transitions. [2021-12-17 20:55:19,639 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 5811 transitions. Word has length 79 [2021-12-17 20:55:19,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:19,640 INFO L470 AbstractCegarLoop]: Abstraction has 3723 states and 5811 transitions. [2021-12-17 20:55:19,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 5811 transitions. [2021-12-17 20:55:19,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 20:55:19,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:19,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:19,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 20:55:19,641 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:19,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:19,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2021-12-17 20:55:19,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:19,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317532106] [2021-12-17 20:55:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:19,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:19,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:19,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317532106] [2021-12-17 20:55:19,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317532106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:19,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:19,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:55:19,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708480815] [2021-12-17 20:55:19,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:19,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:55:19,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:19,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:55:19,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:19,668 INFO L87 Difference]: Start difference. First operand 3723 states and 5811 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:19,771 INFO L93 Difference]: Finished difference Result 7775 states and 11925 transitions. [2021-12-17 20:55:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:55:19,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-17 20:55:19,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:19,785 INFO L225 Difference]: With dead ends: 7775 [2021-12-17 20:55:19,785 INFO L226 Difference]: Without dead ends: 5605 [2021-12-17 20:55:19,788 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 [2021-12-17 20:55:19,789 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 1516 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:19,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1744 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:19,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2021-12-17 20:55:19,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5603. [2021-12-17 20:55:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 5601 states have (on average 1.5316907695054454) internal successors, (8579), 5602 states have internal predecessors, (8579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8579 transitions. [2021-12-17 20:55:19,967 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8579 transitions. Word has length 79 [2021-12-17 20:55:19,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:19,968 INFO L470 AbstractCegarLoop]: Abstraction has 5603 states and 8579 transitions. [2021-12-17 20:55:19,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8579 transitions. [2021-12-17 20:55:19,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 20:55:19,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:19,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:19,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 20:55:19,969 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:19,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2021-12-17 20:55:19,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:19,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679538880] [2021-12-17 20:55:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:19,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:19,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:19,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679538880] [2021-12-17 20:55:19,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679538880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:19,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:19,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:55:19,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567668355] [2021-12-17 20:55:19,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:19,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:55:19,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:55:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:19,993 INFO L87 Difference]: Start difference. First operand 5603 states and 8579 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:20,173 INFO L93 Difference]: Finished difference Result 13127 states and 19749 transitions. [2021-12-17 20:55:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:55:20,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-12-17 20:55:20,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:20,187 INFO L225 Difference]: With dead ends: 13127 [2021-12-17 20:55:20,187 INFO L226 Difference]: Without dead ends: 9077 [2021-12-17 20:55:20,193 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 [2021-12-17 20:55:20,193 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 1520 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:20,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9077 states. [2021-12-17 20:55:20,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9077 to 9075. [2021-12-17 20:55:20,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9075 states, 9073 states have (on average 1.4975201146258128) internal successors, (13587), 9074 states have internal predecessors, (13587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 13587 transitions. [2021-12-17 20:55:20,516 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 13587 transitions. Word has length 79 [2021-12-17 20:55:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:20,516 INFO L470 AbstractCegarLoop]: Abstraction has 9075 states and 13587 transitions. [2021-12-17 20:55:20,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 13587 transitions. [2021-12-17 20:55:20,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 20:55:20,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:20,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:20,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 20:55:20,518 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:20,518 INFO L85 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2021-12-17 20:55:20,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:20,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159959847] [2021-12-17 20:55:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:20,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:20,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:20,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159959847] [2021-12-17 20:55:20,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159959847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:20,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:20,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:55:20,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619388444] [2021-12-17 20:55:20,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:20,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:55:20,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:20,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:55:20,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:55:20,608 INFO L87 Difference]: Start difference. First operand 9075 states and 13587 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:21,197 INFO L93 Difference]: Finished difference Result 15538 states and 22858 transitions. [2021-12-17 20:55:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 20:55:21,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-17 20:55:21,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:21,231 INFO L225 Difference]: With dead ends: 15538 [2021-12-17 20:55:21,231 INFO L226 Difference]: Without dead ends: 15536 [2021-12-17 20:55:21,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 20:55:21,240 INFO L933 BasicCegarLoop]: 1609 mSDtfsCounter, 730 mSDsluCounter, 9164 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 10773 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:21,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 10773 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15536 states. [2021-12-17 20:55:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15536 to 9459. [2021-12-17 20:55:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9459 states, 9457 states have (on average 1.4739346515808396) internal successors, (13939), 9458 states have internal predecessors, (13939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 13939 transitions. [2021-12-17 20:55:21,631 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 13939 transitions. Word has length 80 [2021-12-17 20:55:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:21,631 INFO L470 AbstractCegarLoop]: Abstraction has 9459 states and 13939 transitions. [2021-12-17 20:55:21,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:21,631 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 13939 transitions. [2021-12-17 20:55:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 20:55:21,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:21,635 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:21,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 20:55:21,635 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:21,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:21,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1872923933, now seen corresponding path program 1 times [2021-12-17 20:55:21,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:21,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401807061] [2021-12-17 20:55:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:21,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:21,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:21,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401807061] [2021-12-17 20:55:21,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401807061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:21,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:21,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:55:21,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000583428] [2021-12-17 20:55:21,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:21,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:55:21,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:21,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:55:21,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:21,669 INFO L87 Difference]: Start difference. First operand 9459 states and 13939 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:24,193 INFO L93 Difference]: Finished difference Result 12465 states and 18866 transitions. [2021-12-17 20:55:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:55:24,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-12-17 20:55:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:24,211 INFO L225 Difference]: With dead ends: 12465 [2021-12-17 20:55:24,212 INFO L226 Difference]: Without dead ends: 10961 [2021-12-17 20:55:24,217 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 [2021-12-17 20:55:24,218 INFO L933 BasicCegarLoop]: 1290 mSDtfsCounter, 753 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:24,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1439 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 20:55:24,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10961 states. [2021-12-17 20:55:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10961 to 10961. [2021-12-17 20:55:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10961 states, 10959 states have (on average 1.4686558992608814) internal successors, (16095), 10960 states have internal predecessors, (16095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10961 states to 10961 states and 16095 transitions. [2021-12-17 20:55:24,514 INFO L78 Accepts]: Start accepts. Automaton has 10961 states and 16095 transitions. Word has length 87 [2021-12-17 20:55:24,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:24,514 INFO L470 AbstractCegarLoop]: Abstraction has 10961 states and 16095 transitions. [2021-12-17 20:55:24,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 10961 states and 16095 transitions. [2021-12-17 20:55:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-17 20:55:24,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:24,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:24,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 20:55:24,516 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:24,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:24,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1350127217, now seen corresponding path program 1 times [2021-12-17 20:55:24,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:24,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216222856] [2021-12-17 20:55:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:24,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:24,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:24,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216222856] [2021-12-17 20:55:24,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216222856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:24,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:24,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 20:55:24,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272786759] [2021-12-17 20:55:24,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:24,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:55:24,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:24,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:55:24,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:24,568 INFO L87 Difference]: Start difference. First operand 10961 states and 16095 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 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) [2021-12-17 20:55:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:27,162 INFO L93 Difference]: Finished difference Result 15469 states and 23178 transitions. [2021-12-17 20:55:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:55:27,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 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 [2021-12-17 20:55:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:27,184 INFO L225 Difference]: With dead ends: 15469 [2021-12-17 20:55:27,184 INFO L226 Difference]: Without dead ends: 12463 [2021-12-17 20:55:27,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:55:27,192 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 866 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 962 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 3267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 962 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:27,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 295 Invalid, 3267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [962 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 20:55:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12463 states. [2021-12-17 20:55:27,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12463 to 12463. [2021-12-17 20:55:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12463 states, 12461 states have (on average 1.482545542091325) internal successors, (18474), 12462 states have internal predecessors, (18474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12463 states to 12463 states and 18474 transitions. [2021-12-17 20:55:27,481 INFO L78 Accepts]: Start accepts. Automaton has 12463 states and 18474 transitions. Word has length 90 [2021-12-17 20:55:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:27,481 INFO L470 AbstractCegarLoop]: Abstraction has 12463 states and 18474 transitions. [2021-12-17 20:55:27,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 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) [2021-12-17 20:55:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 12463 states and 18474 transitions. [2021-12-17 20:55:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 20:55:27,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:27,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:27,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 20:55:27,483 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:27,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:27,483 INFO L85 PathProgramCache]: Analyzing trace with hash 2007737191, now seen corresponding path program 1 times [2021-12-17 20:55:27,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:27,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283326301] [2021-12-17 20:55:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:27,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:55:27,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:27,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283326301] [2021-12-17 20:55:27,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283326301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:27,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:27,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:55:27,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449338404] [2021-12-17 20:55:27,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:27,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 20:55:27,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:27,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 20:55:27,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 20:55:27,558 INFO L87 Difference]: Start difference. First operand 12463 states and 18474 transitions. Second operand has 4 states, 4 states have (on average 22.75) 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) [2021-12-17 20:55:30,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:30,238 INFO L93 Difference]: Finished difference Result 17745 states and 26499 transitions. [2021-12-17 20:55:30,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 20:55:30,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) 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 [2021-12-17 20:55:30,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:30,257 INFO L225 Difference]: With dead ends: 17745 [2021-12-17 20:55:30,257 INFO L226 Difference]: Without dead ends: 13237 [2021-12-17 20:55:30,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 20:55:30,265 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 1501 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 435 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 2935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 435 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:30,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1501 Valid, 1927 Invalid, 2935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [435 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 20:55:30,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13237 states. [2021-12-17 20:55:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13237 to 13214. [2021-12-17 20:55:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13214 states, 13212 states have (on average 1.4555706933091128) internal successors, (19231), 13213 states have internal predecessors, (19231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13214 states to 13214 states and 19231 transitions. [2021-12-17 20:55:30,573 INFO L78 Accepts]: Start accepts. Automaton has 13214 states and 19231 transitions. Word has length 91 [2021-12-17 20:55:30,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:30,574 INFO L470 AbstractCegarLoop]: Abstraction has 13214 states and 19231 transitions. [2021-12-17 20:55:30,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) 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) [2021-12-17 20:55:30,574 INFO L276 IsEmpty]: Start isEmpty. Operand 13214 states and 19231 transitions. [2021-12-17 20:55:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:55:30,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:30,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:30,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 20:55:30,579 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:30,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2021-12-17 20:55:30,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126979498] [2021-12-17 20:55:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:30,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 20:55:30,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:30,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126979498] [2021-12-17 20:55:30,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126979498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:30,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:30,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:55:30,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089729780] [2021-12-17 20:55:30,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:30,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:55:30,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:30,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:55:30,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:55:30,644 INFO L87 Difference]: Start difference. First operand 13214 states and 19231 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:32,257 INFO L93 Difference]: Finished difference Result 62220 states and 89942 transitions. [2021-12-17 20:55:32,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:55:32,257 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 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 112 [2021-12-17 20:55:32,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:32,329 INFO L225 Difference]: With dead ends: 62220 [2021-12-17 20:55:32,329 INFO L226 Difference]: Without dead ends: 54314 [2021-12-17 20:55:32,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:55:32,350 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8617 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8617 SdHoareTripleChecker+Valid, 3801 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:32,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8617 Valid, 3801 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:32,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54314 states. [2021-12-17 20:55:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54314 to 21118. [2021-12-17 20:55:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21118 states, 21116 states have (on average 1.4471964387194545) internal successors, (30559), 21117 states have internal predecessors, (30559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:33,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21118 states to 21118 states and 30559 transitions. [2021-12-17 20:55:33,359 INFO L78 Accepts]: Start accepts. Automaton has 21118 states and 30559 transitions. Word has length 112 [2021-12-17 20:55:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:33,360 INFO L470 AbstractCegarLoop]: Abstraction has 21118 states and 30559 transitions. [2021-12-17 20:55:33,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 21118 states and 30559 transitions. [2021-12-17 20:55:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:55:33,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:33,370 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 20:55:33,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 20:55:33,370 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:33,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2021-12-17 20:55:33,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024271127] [2021-12-17 20:55:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:33,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 20:55:33,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:33,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024271127] [2021-12-17 20:55:33,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024271127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:33,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:33,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:55:33,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717459707] [2021-12-17 20:55:33,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:33,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:55:33,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:55:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:55:33,447 INFO L87 Difference]: Start difference. First operand 21118 states and 30559 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:35,402 INFO L93 Difference]: Finished difference Result 70124 states and 101270 transitions. [2021-12-17 20:55:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:55:35,403 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 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 112 [2021-12-17 20:55:35,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:35,487 INFO L225 Difference]: With dead ends: 70124 [2021-12-17 20:55:35,487 INFO L226 Difference]: Without dead ends: 62218 [2021-12-17 20:55:35,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:55:35,504 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8440 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8440 SdHoareTripleChecker+Valid, 3881 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:35,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8440 Valid, 3881 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:55:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62218 states. [2021-12-17 20:55:36,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62218 to 32990. [2021-12-17 20:55:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32990 states, 32988 states have (on average 1.4390384382199588) internal successors, (47471), 32989 states have internal predecessors, (47471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:37,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32990 states to 32990 states and 47471 transitions. [2021-12-17 20:55:37,165 INFO L78 Accepts]: Start accepts. Automaton has 32990 states and 47471 transitions. Word has length 112 [2021-12-17 20:55:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:37,166 INFO L470 AbstractCegarLoop]: Abstraction has 32990 states and 47471 transitions. [2021-12-17 20:55:37,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 32990 states and 47471 transitions. [2021-12-17 20:55:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:55:37,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:37,173 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 20:55:37,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 20:55:37,173 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:37,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2021-12-17 20:55:37,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:37,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227495259] [2021-12-17 20:55:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:37,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 20:55:37,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:37,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227495259] [2021-12-17 20:55:37,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227495259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:37,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:37,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:55:37,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081582156] [2021-12-17 20:55:37,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:37,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:55:37,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:37,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:55:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:55:37,258 INFO L87 Difference]: Start difference. First operand 32990 states and 47471 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:39,637 INFO L93 Difference]: Finished difference Result 78028 states and 112598 transitions. [2021-12-17 20:55:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:55:39,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 112 [2021-12-17 20:55:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:39,743 INFO L225 Difference]: With dead ends: 78028 [2021-12-17 20:55:39,744 INFO L226 Difference]: Without dead ends: 70122 [2021-12-17 20:55:39,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:55:39,770 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8408 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8408 SdHoareTripleChecker+Valid, 3921 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:39,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8408 Valid, 3921 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:55:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70122 states. [2021-12-17 20:55:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70122 to 40894. [2021-12-17 20:55:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40894 states, 40892 states have (on average 1.4379096155727282) internal successors, (58799), 40893 states have internal predecessors, (58799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40894 states to 40894 states and 58799 transitions. [2021-12-17 20:55:41,629 INFO L78 Accepts]: Start accepts. Automaton has 40894 states and 58799 transitions. Word has length 112 [2021-12-17 20:55:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:41,629 INFO L470 AbstractCegarLoop]: Abstraction has 40894 states and 58799 transitions. [2021-12-17 20:55:41,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 40894 states and 58799 transitions. [2021-12-17 20:55:41,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:55:41,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:41,637 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 20:55:41,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 20:55:41,638 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:41,638 INFO L85 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2021-12-17 20:55:41,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:41,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047354050] [2021-12-17 20:55:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:41,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 20:55:41,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:41,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047354050] [2021-12-17 20:55:41,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047354050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:41,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:41,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:55:41,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591233982] [2021-12-17 20:55:41,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:41,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:55:41,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:41,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:55:41,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:55:41,698 INFO L87 Difference]: Start difference. First operand 40894 states and 58799 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:45,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:45,081 INFO L93 Difference]: Finished difference Result 85932 states and 123926 transitions. [2021-12-17 20:55:45,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:55:45,082 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 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 112 [2021-12-17 20:55:45,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:45,200 INFO L225 Difference]: With dead ends: 85932 [2021-12-17 20:55:45,201 INFO L226 Difference]: Without dead ends: 78026 [2021-12-17 20:55:45,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:55:45,233 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8478 mSDsluCounter, 2253 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8478 SdHoareTripleChecker+Valid, 3918 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:45,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8478 Valid, 3918 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:55:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78026 states. [2021-12-17 20:55:47,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78026 to 48798. [2021-12-17 20:55:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48798 states, 48796 states have (on average 1.4371464874170015) internal successors, (70127), 48797 states have internal predecessors, (70127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48798 states to 48798 states and 70127 transitions. [2021-12-17 20:55:47,565 INFO L78 Accepts]: Start accepts. Automaton has 48798 states and 70127 transitions. Word has length 112 [2021-12-17 20:55:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:47,565 INFO L470 AbstractCegarLoop]: Abstraction has 48798 states and 70127 transitions. [2021-12-17 20:55:47,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 48798 states and 70127 transitions. [2021-12-17 20:55:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:55:47,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:47,573 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 20:55:47,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 20:55:47,573 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:47,574 INFO L85 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2021-12-17 20:55:47,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:47,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252208832] [2021-12-17 20:55:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:47,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 20:55:47,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:47,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252208832] [2021-12-17 20:55:47,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252208832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:47,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:47,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:55:47,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820199642] [2021-12-17 20:55:47,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:47,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:55:47,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:47,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:55:47,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:55:47,631 INFO L87 Difference]: Start difference. First operand 48798 states and 70127 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:51,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:51,630 INFO L93 Difference]: Finished difference Result 93836 states and 135254 transitions. [2021-12-17 20:55:51,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:55:51,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-17 20:55:51,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:51,755 INFO L225 Difference]: With dead ends: 93836 [2021-12-17 20:55:51,755 INFO L226 Difference]: Without dead ends: 85930 [2021-12-17 20:55:51,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:55:51,784 INFO L933 BasicCegarLoop]: 1666 mSDtfsCounter, 8582 mSDsluCounter, 2245 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8582 SdHoareTripleChecker+Valid, 3911 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:51,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8582 Valid, 3911 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:55:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85930 states. [2021-12-17 20:55:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85930 to 56702. [2021-12-17 20:55:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56702 states, 56700 states have (on average 1.4365961199294532) internal successors, (81455), 56701 states have internal predecessors, (81455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56702 states to 56702 states and 81455 transitions. [2021-12-17 20:55:54,933 INFO L78 Accepts]: Start accepts. Automaton has 56702 states and 81455 transitions. Word has length 112 [2021-12-17 20:55:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:55:54,933 INFO L470 AbstractCegarLoop]: Abstraction has 56702 states and 81455 transitions. [2021-12-17 20:55:54,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 56702 states and 81455 transitions. [2021-12-17 20:55:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-17 20:55:54,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:55:54,941 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:55:54,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 20:55:54,941 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:55:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:55:54,942 INFO L85 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2021-12-17 20:55:54,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:55:54,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868333520] [2021-12-17 20:55:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:55:54,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:55:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:55:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 20:55:55,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:55:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868333520] [2021-12-17 20:55:55,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868333520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:55:55,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:55:55,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 20:55:55,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240611299] [2021-12-17 20:55:55,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:55:55,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 20:55:55,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:55:55,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 20:55:55,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 20:55:55,003 INFO L87 Difference]: Start difference. First operand 56702 states and 81455 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:55:59,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:55:59,744 INFO L93 Difference]: Finished difference Result 96940 states and 139734 transitions. [2021-12-17 20:55:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 20:55:59,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 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 112 [2021-12-17 20:55:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:55:59,876 INFO L225 Difference]: With dead ends: 96940 [2021-12-17 20:55:59,876 INFO L226 Difference]: Without dead ends: 91434 [2021-12-17 20:55:59,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 20:55:59,901 INFO L933 BasicCegarLoop]: 1663 mSDtfsCounter, 8579 mSDsluCounter, 2170 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8579 SdHoareTripleChecker+Valid, 3833 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 20:55:59,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8579 Valid, 3833 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 20:55:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91434 states. [2021-12-17 20:56:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91434 to 62206. [2021-12-17 20:56:03,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62206 states, 62204 states have (on average 1.4370619252781172) internal successors, (89391), 62205 states have internal predecessors, (89391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62206 states to 62206 states and 89391 transitions. [2021-12-17 20:56:03,384 INFO L78 Accepts]: Start accepts. Automaton has 62206 states and 89391 transitions. Word has length 112 [2021-12-17 20:56:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:03,384 INFO L470 AbstractCegarLoop]: Abstraction has 62206 states and 89391 transitions. [2021-12-17 20:56:03,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:03,384 INFO L276 IsEmpty]: Start isEmpty. Operand 62206 states and 89391 transitions. [2021-12-17 20:56:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 20:56:03,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:03,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 20:56:03,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 20:56:03,396 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2021-12-17 20:56:03,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:03,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988718376] [2021-12-17 20:56:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:03,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:03,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988718376] [2021-12-17 20:56:03,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988718376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:03,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:03,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:56:03,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152227436] [2021-12-17 20:56:03,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:03,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:56:03,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:56:03,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:03,453 INFO L87 Difference]: Start difference. First operand 62206 states and 89391 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:06,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:06,589 INFO L93 Difference]: Finished difference Result 119106 states and 170977 transitions. [2021-12-17 20:56:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:56:06,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-17 20:56:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:06,674 INFO L225 Difference]: With dead ends: 119106 [2021-12-17 20:56:06,674 INFO L226 Difference]: Without dead ends: 62208 [2021-12-17 20:56:06,701 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 [2021-12-17 20:56:06,701 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 60 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:06,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 3192 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:06,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62208 states. [2021-12-17 20:56:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62208 to 62206. [2021-12-17 20:56:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62206 states, 62204 states have (on average 1.426001543309112) internal successors, (88703), 62205 states have internal predecessors, (88703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62206 states to 62206 states and 88703 transitions. [2021-12-17 20:56:10,192 INFO L78 Accepts]: Start accepts. Automaton has 62206 states and 88703 transitions. Word has length 113 [2021-12-17 20:56:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 20:56:10,192 INFO L470 AbstractCegarLoop]: Abstraction has 62206 states and 88703 transitions. [2021-12-17 20:56:10,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 62206 states and 88703 transitions. [2021-12-17 20:56:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 20:56:10,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 20:56:10,211 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 20:56:10,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 20:56:10,212 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 20:56:10,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 20:56:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1169646557, now seen corresponding path program 1 times [2021-12-17 20:56:10,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 20:56:10,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608442891] [2021-12-17 20:56:10,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 20:56:10,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 20:56:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 20:56:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 20:56:10,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 20:56:10,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608442891] [2021-12-17 20:56:10,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608442891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 20:56:10,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 20:56:10,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 20:56:10,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649067612] [2021-12-17 20:56:10,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 20:56:10,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 20:56:10,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 20:56:10,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 20:56:10,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 20:56:10,298 INFO L87 Difference]: Start difference. First operand 62206 states and 88703 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 20:56:12,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 20:56:12,182 INFO L93 Difference]: Finished difference Result 90658 states and 129153 transitions. [2021-12-17 20:56:12,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 20:56:12,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-17 20:56:12,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 20:56:12,234 INFO L225 Difference]: With dead ends: 90658 [2021-12-17 20:56:12,234 INFO L226 Difference]: Without dead ends: 33760 [2021-12-17 20:56:12,277 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 [2021-12-17 20:56:12,277 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 56 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 20:56:12,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 3177 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 20:56:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33760 states.