./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/pc_sfifo_2.cil-1+token_ring.05.cil-1.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 52de5146a3a24866d31d2076a85235f80d04004402c35cfcf3c3304704a7fec0 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:18:03,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:18:03,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:18:03,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:18:03,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:18:03,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:18:03,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:18:03,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:18:03,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:18:03,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:18:03,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:18:03,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:18:03,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:18:03,141 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:18:03,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:18:03,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:18:03,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:18:03,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:18:03,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:18:03,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:18:03,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:18:03,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:18:03,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:18:03,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:18:03,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:18:03,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:18:03,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:18:03,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:18:03,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:18:03,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:18:03,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:18:03,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:18:03,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:18:03,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:18:03,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:18:03,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:18:03,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:18:03,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:18:03,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:18:03,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:18:03,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:18:03,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:18:03,202 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:18:03,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:18:03,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:18:03,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:18:03,203 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:18:03,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:18:03,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:18:03,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:18:03,204 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:18:03,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:18:03,205 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:18:03,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:18:03,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:18:03,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:18:03,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:18:03,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:18:03,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:18:03,206 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:18:03,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:18:03,207 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:18:03,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:18:03,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:18:03,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:18:03,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:18:03,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:18:03,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:18:03,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:18:03,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:18:03,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:18:03,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:18:03,209 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:18:03,210 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:18:03,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:18:03,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:18:03,210 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52de5146a3a24866d31d2076a85235f80d04004402c35cfcf3c3304704a7fec0 [2021-12-14 16:18:03,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:18:03,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:18:03,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:18:03,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:18:03,406 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:18:03,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c [2021-12-14 16:18:03,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a27e1e079/fcc797d703db4a379ee1cffe7e90fb40/FLAG610269333 [2021-12-14 16:18:03,853 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:18:03,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-1.c [2021-12-14 16:18:03,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a27e1e079/fcc797d703db4a379ee1cffe7e90fb40/FLAG610269333 [2021-12-14 16:18:04,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a27e1e079/fcc797d703db4a379ee1cffe7e90fb40 [2021-12-14 16:18:04,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:18:04,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:18:04,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:18:04,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:18:04,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:18:04,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb8d07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04, skipping insertion in model container [2021-12-14 16:18:04,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:18:04,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:18:04,413 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/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[914,927] [2021-12-14 16:18:04,447 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/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[7115,7128] [2021-12-14 16:18:04,499 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:18:04,511 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:18:04,528 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/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[914,927] [2021-12-14 16:18:04,556 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/pc_sfifo_2.cil-1+token_ring.05.cil-1.c[7115,7128] [2021-12-14 16:18:04,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:18:04,596 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:18:04,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04 WrapperNode [2021-12-14 16:18:04,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:18:04,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:18:04,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:18:04,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:18:04,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,635 INFO L137 Inliner]: procedures = 63, calls = 72, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 634 [2021-12-14 16:18:04,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:18:04,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:18:04,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:18:04,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:18:04,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:18:04,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:18:04,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:18:04,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:18:04,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04" (1/1) ... [2021-12-14 16:18:04,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:18:04,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:18:04,705 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) [2021-12-14 16:18:04,716 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 [2021-12-14 16:18:04,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:18:04,737 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 16:18:04,737 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 16:18:04,737 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-14 16:18:04,741 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-14 16:18:04,741 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-14 16:18:04,741 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-14 16:18:04,741 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-14 16:18:04,742 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-14 16:18:04,742 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-14 16:18:04,742 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-14 16:18:04,742 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-14 16:18:04,742 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-14 16:18:04,742 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-14 16:18:04,742 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-14 16:18:04,743 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-14 16:18:04,743 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-14 16:18:04,743 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-14 16:18:04,743 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-14 16:18:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-14 16:18:04,744 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-14 16:18:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-14 16:18:04,744 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-14 16:18:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:18:04,745 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-14 16:18:04,745 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-14 16:18:04,745 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-14 16:18:04,745 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-14 16:18:04,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:18:04,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:18:04,746 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-14 16:18:04,746 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-14 16:18:04,812 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:18:04,813 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:18:05,274 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:18:05,280 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:18:05,281 INFO L301 CfgBuilder]: Removed 12 assume(true) statements. [2021-12-14 16:18:05,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:18:05 BoogieIcfgContainer [2021-12-14 16:18:05,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:18:05,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:18:05,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:18:05,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:18:05,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:18:04" (1/3) ... [2021-12-14 16:18:05,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19038395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:18:05, skipping insertion in model container [2021-12-14 16:18:05,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:18:04" (2/3) ... [2021-12-14 16:18:05,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19038395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:18:05, skipping insertion in model container [2021-12-14 16:18:05,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:18:05" (3/3) ... [2021-12-14 16:18:05,288 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.05.cil-1.c [2021-12-14 16:18:05,291 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:18:05,292 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:18:05,333 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:18:05,340 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 [2021-12-14 16:18:05,341 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:18:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 308 states, 258 states have (on average 1.5968992248062015) internal successors, (412), 264 states have internal predecessors, (412), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-14 16:18:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:05,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:05,370 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] [2021-12-14 16:18:05,371 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:05,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:05,375 INFO L85 PathProgramCache]: Analyzing trace with hash -2128266520, now seen corresponding path program 1 times [2021-12-14 16:18:05,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:05,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745357954] [2021-12-14 16:18:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:05,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:05,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:05,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:05,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:05,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:05,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:05,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:05,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:05,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:05,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:05,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745357954] [2021-12-14 16:18:05,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745357954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:05,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:05,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:05,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158525143] [2021-12-14 16:18:05,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:05,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:05,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:05,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:05,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:05,676 INFO L87 Difference]: Start difference. First operand has 308 states, 258 states have (on average 1.5968992248062015) internal successors, (412), 264 states have internal predecessors, (412), 33 states have call successors, (33), 14 states have call predecessors, (33), 14 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:06,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:06,242 INFO L93 Difference]: Finished difference Result 613 states and 949 transitions. [2021-12-14 16:18:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:18:06,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:18:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:06,259 INFO L225 Difference]: With dead ends: 613 [2021-12-14 16:18:06,260 INFO L226 Difference]: Without dead ends: 316 [2021-12-14 16:18:06,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:18:06,270 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 472 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:06,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 1229 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:18:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-14 16:18:06,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 298. [2021-12-14 16:18:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 250 states have (on average 1.5) internal successors, (375), 254 states have internal predecessors, (375), 33 states have call successors, (33), 14 states have call predecessors, (33), 13 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-14 16:18:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 439 transitions. [2021-12-14 16:18:06,336 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 439 transitions. Word has length 65 [2021-12-14 16:18:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:06,337 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 439 transitions. [2021-12-14 16:18:06,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 439 transitions. [2021-12-14 16:18:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:06,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:06,340 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] [2021-12-14 16:18:06,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:18:06,340 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:06,341 INFO L85 PathProgramCache]: Analyzing trace with hash 779915366, now seen corresponding path program 1 times [2021-12-14 16:18:06,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:06,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205438968] [2021-12-14 16:18:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:06,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:06,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:06,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:06,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:06,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:06,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:06,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:06,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:06,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:06,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205438968] [2021-12-14 16:18:06,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205438968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:06,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:06,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:06,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186130100] [2021-12-14 16:18:06,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:06,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:06,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:06,481 INFO L87 Difference]: Start difference. First operand 298 states and 439 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:07,135 INFO L93 Difference]: Finished difference Result 521 states and 753 transitions. [2021-12-14 16:18:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:18:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:07,137 INFO L225 Difference]: With dead ends: 521 [2021-12-14 16:18:07,138 INFO L226 Difference]: Without dead ends: 433 [2021-12-14 16:18:07,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:18:07,139 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 561 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:07,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 1683 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-12-14 16:18:07,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 394. [2021-12-14 16:18:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 326 states have (on average 1.469325153374233) internal successors, (479), 332 states have internal predecessors, (479), 44 states have call successors, (44), 21 states have call predecessors, (44), 22 states have return successors, (47), 43 states have call predecessors, (47), 42 states have call successors, (47) [2021-12-14 16:18:07,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 570 transitions. [2021-12-14 16:18:07,166 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 570 transitions. Word has length 65 [2021-12-14 16:18:07,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:07,167 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 570 transitions. [2021-12-14 16:18:07,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:07,167 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 570 transitions. [2021-12-14 16:18:07,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:07,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:07,169 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] [2021-12-14 16:18:07,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:18:07,170 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:07,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1836163290, now seen corresponding path program 1 times [2021-12-14 16:18:07,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:07,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807843249] [2021-12-14 16:18:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:07,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:07,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:07,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:07,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:07,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:07,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:07,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:07,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:07,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:07,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807843249] [2021-12-14 16:18:07,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807843249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:07,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:07,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:07,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510330620] [2021-12-14 16:18:07,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:07,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:07,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:07,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:07,251 INFO L87 Difference]: Start difference. First operand 394 states and 570 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:08,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:08,003 INFO L93 Difference]: Finished difference Result 741 states and 1046 transitions. [2021-12-14 16:18:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:18:08,003 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:18:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:08,006 INFO L225 Difference]: With dead ends: 741 [2021-12-14 16:18:08,006 INFO L226 Difference]: Without dead ends: 564 [2021-12-14 16:18:08,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:18:08,007 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 839 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:08,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 1806 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-12-14 16:18:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 490. [2021-12-14 16:18:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 402 states have (on average 1.4477611940298507) internal successors, (582), 410 states have internal predecessors, (582), 55 states have call successors, (55), 28 states have call predecessors, (55), 31 states have return successors, (66), 55 states have call predecessors, (66), 53 states have call successors, (66) [2021-12-14 16:18:08,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 703 transitions. [2021-12-14 16:18:08,036 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 703 transitions. Word has length 65 [2021-12-14 16:18:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:08,036 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 703 transitions. [2021-12-14 16:18:08,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 703 transitions. [2021-12-14 16:18:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:08,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:08,042 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] [2021-12-14 16:18:08,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:18:08,043 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:08,043 INFO L85 PathProgramCache]: Analyzing trace with hash 430217896, now seen corresponding path program 1 times [2021-12-14 16:18:08,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:08,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752455106] [2021-12-14 16:18:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:08,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:08,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:08,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752455106] [2021-12-14 16:18:08,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752455106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:08,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:08,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:08,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196121408] [2021-12-14 16:18:08,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:08,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:08,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:08,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:08,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:08,178 INFO L87 Difference]: Start difference. First operand 490 states and 703 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:08,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:08,766 INFO L93 Difference]: Finished difference Result 791 states and 1117 transitions. [2021-12-14 16:18:08,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:18:08,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-14 16:18:08,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:08,769 INFO L225 Difference]: With dead ends: 791 [2021-12-14 16:18:08,769 INFO L226 Difference]: Without dead ends: 524 [2021-12-14 16:18:08,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:18:08,770 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 548 mSDsluCounter, 1431 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:08,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 1858 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-12-14 16:18:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 495. [2021-12-14 16:18:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 406 states have (on average 1.438423645320197) internal successors, (584), 414 states have internal predecessors, (584), 55 states have call successors, (55), 28 states have call predecessors, (55), 32 states have return successors, (67), 56 states have call predecessors, (67), 53 states have call successors, (67) [2021-12-14 16:18:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 706 transitions. [2021-12-14 16:18:08,801 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 706 transitions. Word has length 65 [2021-12-14 16:18:08,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:08,801 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 706 transitions. [2021-12-14 16:18:08,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 706 transitions. [2021-12-14 16:18:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:08,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:08,803 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] [2021-12-14 16:18:08,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:18:08,804 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash -599141402, now seen corresponding path program 1 times [2021-12-14 16:18:08,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:08,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275394536] [2021-12-14 16:18:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:08,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:08,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:08,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275394536] [2021-12-14 16:18:08,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275394536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:08,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:08,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:08,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943802591] [2021-12-14 16:18:08,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:08,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:08,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:08,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:08,941 INFO L87 Difference]: Start difference. First operand 495 states and 706 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:09,589 INFO L93 Difference]: Finished difference Result 813 states and 1139 transitions. [2021-12-14 16:18:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:18:09,590 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-14 16:18:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:09,593 INFO L225 Difference]: With dead ends: 813 [2021-12-14 16:18:09,593 INFO L226 Difference]: Without dead ends: 541 [2021-12-14 16:18:09,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:18:09,595 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 370 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:09,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 2046 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-12-14 16:18:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 510. [2021-12-14 16:18:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 418 states have (on average 1.4258373205741626) internal successors, (596), 426 states have internal predecessors, (596), 55 states have call successors, (55), 28 states have call predecessors, (55), 35 states have return successors, (70), 59 states have call predecessors, (70), 53 states have call successors, (70) [2021-12-14 16:18:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 721 transitions. [2021-12-14 16:18:09,617 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 721 transitions. Word has length 65 [2021-12-14 16:18:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:09,617 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 721 transitions. [2021-12-14 16:18:09,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 721 transitions. [2021-12-14 16:18:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:09,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:09,620 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] [2021-12-14 16:18:09,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:18:09,620 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:09,621 INFO L85 PathProgramCache]: Analyzing trace with hash 787061992, now seen corresponding path program 1 times [2021-12-14 16:18:09,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:09,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122338421] [2021-12-14 16:18:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:09,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:09,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:09,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:09,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:09,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:09,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:09,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:09,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:09,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:09,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122338421] [2021-12-14 16:18:09,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122338421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:09,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:09,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:09,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065864451] [2021-12-14 16:18:09,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:09,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:09,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:09,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:09,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:09,717 INFO L87 Difference]: Start difference. First operand 510 states and 721 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:10,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:10,365 INFO L93 Difference]: Finished difference Result 902 states and 1232 transitions. [2021-12-14 16:18:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 16:18:10,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:18:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:10,368 INFO L225 Difference]: With dead ends: 902 [2021-12-14 16:18:10,369 INFO L226 Difference]: Without dead ends: 617 [2021-12-14 16:18:10,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-14 16:18:10,370 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 1071 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:10,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 1360 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-12-14 16:18:10,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 522. [2021-12-14 16:18:10,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 428 states have (on average 1.4158878504672898) internal successors, (606), 436 states have internal predecessors, (606), 56 states have call successors, (56), 29 states have call predecessors, (56), 36 states have return successors, (69), 60 states have call predecessors, (69), 54 states have call successors, (69) [2021-12-14 16:18:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 731 transitions. [2021-12-14 16:18:10,391 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 731 transitions. Word has length 65 [2021-12-14 16:18:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:10,392 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 731 transitions. [2021-12-14 16:18:10,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 731 transitions. [2021-12-14 16:18:10,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 16:18:10,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:10,393 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] [2021-12-14 16:18:10,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:18:10,394 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:10,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:10,394 INFO L85 PathProgramCache]: Analyzing trace with hash 653048486, now seen corresponding path program 1 times [2021-12-14 16:18:10,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:10,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838575544] [2021-12-14 16:18:10,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:10,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:10,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:10,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:10,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838575544] [2021-12-14 16:18:10,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838575544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:10,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:10,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:10,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284378048] [2021-12-14 16:18:10,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:10,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:10,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:10,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:10,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:10,474 INFO L87 Difference]: Start difference. First operand 522 states and 731 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:10,850 INFO L93 Difference]: Finished difference Result 1164 states and 1575 transitions. [2021-12-14 16:18:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 16:18:10,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-14 16:18:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:10,854 INFO L225 Difference]: With dead ends: 1164 [2021-12-14 16:18:10,855 INFO L226 Difference]: Without dead ends: 868 [2021-12-14 16:18:10,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:18:10,856 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 839 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:10,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 1231 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:18:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-12-14 16:18:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 812. [2021-12-14 16:18:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 652 states have (on average 1.3650306748466257) internal successors, (890), 667 states have internal predecessors, (890), 91 states have call successors, (91), 51 states have call predecessors, (91), 67 states have return successors, (126), 100 states have call predecessors, (126), 89 states have call successors, (126) [2021-12-14 16:18:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1107 transitions. [2021-12-14 16:18:10,889 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1107 transitions. Word has length 65 [2021-12-14 16:18:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:10,890 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1107 transitions. [2021-12-14 16:18:10,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-14 16:18:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1107 transitions. [2021-12-14 16:18:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:18:10,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:10,892 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] [2021-12-14 16:18:10,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:18:10,892 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash -547287697, now seen corresponding path program 1 times [2021-12-14 16:18:10,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:10,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602763296] [2021-12-14 16:18:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:10,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:10,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:10,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602763296] [2021-12-14 16:18:10,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602763296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:10,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:10,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:10,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748911528] [2021-12-14 16:18:10,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:10,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:10,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:10,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:10,986 INFO L87 Difference]: Start difference. First operand 812 states and 1107 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:11,417 INFO L93 Difference]: Finished difference Result 2015 states and 2674 transitions. [2021-12-14 16:18:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:18:11,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-14 16:18:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:11,423 INFO L225 Difference]: With dead ends: 2015 [2021-12-14 16:18:11,423 INFO L226 Difference]: Without dead ends: 1408 [2021-12-14 16:18:11,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:18:11,425 INFO L933 BasicCegarLoop]: 428 mSDtfsCounter, 769 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:11,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 1034 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:18:11,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-12-14 16:18:11,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1293. [2021-12-14 16:18:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1031 states have (on average 1.3317167798254121) internal successors, (1373), 1049 states have internal predecessors, (1373), 136 states have call successors, (136), 95 states have call predecessors, (136), 124 states have return successors, (198), 155 states have call predecessors, (198), 134 states have call successors, (198) [2021-12-14 16:18:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1707 transitions. [2021-12-14 16:18:11,477 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1707 transitions. Word has length 66 [2021-12-14 16:18:11,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:11,477 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 1707 transitions. [2021-12-14 16:18:11,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:11,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1707 transitions. [2021-12-14 16:18:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:18:11,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:11,479 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] [2021-12-14 16:18:11,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:18:11,480 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:11,480 INFO L85 PathProgramCache]: Analyzing trace with hash 910951962, now seen corresponding path program 1 times [2021-12-14 16:18:11,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:11,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538726788] [2021-12-14 16:18:11,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:11,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:11,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:11,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:11,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:11,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:11,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:11,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:11,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:11,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:11,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538726788] [2021-12-14 16:18:11,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538726788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:11,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:11,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:11,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250760781] [2021-12-14 16:18:11,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:11,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:11,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:11,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:11,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:11,543 INFO L87 Difference]: Start difference. First operand 1293 states and 1707 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:11,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:11,875 INFO L93 Difference]: Finished difference Result 3481 states and 4513 transitions. [2021-12-14 16:18:11,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:18:11,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-14 16:18:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:11,886 INFO L225 Difference]: With dead ends: 3481 [2021-12-14 16:18:11,886 INFO L226 Difference]: Without dead ends: 2413 [2021-12-14 16:18:11,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:18:11,890 INFO L933 BasicCegarLoop]: 429 mSDtfsCounter, 1057 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:11,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 864 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:18:11,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-12-14 16:18:11,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2155. [2021-12-14 16:18:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 1697 states have (on average 1.296405421331762) internal successors, (2200), 1725 states have internal predecessors, (2200), 234 states have call successors, (234), 179 states have call predecessors, (234), 222 states have return successors, (334), 257 states have call predecessors, (334), 232 states have call successors, (334) [2021-12-14 16:18:11,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 2768 transitions. [2021-12-14 16:18:11,998 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 2768 transitions. Word has length 66 [2021-12-14 16:18:11,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:11,998 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 2768 transitions. [2021-12-14 16:18:11,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:11,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 2768 transitions. [2021-12-14 16:18:12,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 16:18:12,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:12,000 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] [2021-12-14 16:18:12,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:18:12,001 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:12,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:12,001 INFO L85 PathProgramCache]: Analyzing trace with hash 680194510, now seen corresponding path program 1 times [2021-12-14 16:18:12,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:12,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237885242] [2021-12-14 16:18:12,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:12,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:12,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:12,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237885242] [2021-12-14 16:18:12,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237885242] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:12,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:12,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:12,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661753004] [2021-12-14 16:18:12,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:12,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:12,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:12,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:12,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:12,063 INFO L87 Difference]: Start difference. First operand 2155 states and 2768 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:12,469 INFO L93 Difference]: Finished difference Result 5065 states and 6418 transitions. [2021-12-14 16:18:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:18:12,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-14 16:18:12,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:12,480 INFO L225 Difference]: With dead ends: 5065 [2021-12-14 16:18:12,480 INFO L226 Difference]: Without dead ends: 3135 [2021-12-14 16:18:12,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:18:12,485 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 825 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:12,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 1103 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 16:18:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-12-14 16:18:12,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 2887. [2021-12-14 16:18:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2265 states have (on average 1.2821192052980133) internal successors, (2904), 2301 states have internal predecessors, (2904), 314 states have call successors, (314), 249 states have call predecessors, (314), 306 states have return successors, (443), 343 states have call predecessors, (443), 312 states have call successors, (443) [2021-12-14 16:18:12,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 3661 transitions. [2021-12-14 16:18:12,602 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 3661 transitions. Word has length 72 [2021-12-14 16:18:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:12,603 INFO L470 AbstractCegarLoop]: Abstraction has 2887 states and 3661 transitions. [2021-12-14 16:18:12,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 16:18:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 3661 transitions. [2021-12-14 16:18:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 16:18:12,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:12,605 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:18:12,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:18:12,606 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:12,606 INFO L85 PathProgramCache]: Analyzing trace with hash -905222844, now seen corresponding path program 1 times [2021-12-14 16:18:12,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:12,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382532540] [2021-12-14 16:18:12,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:12,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:12,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:12,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382532540] [2021-12-14 16:18:12,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382532540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:12,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:12,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:12,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268106450] [2021-12-14 16:18:12,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:12,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:12,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:12,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:12,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:12,685 INFO L87 Difference]: Start difference. First operand 2887 states and 3661 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 16:18:13,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:13,060 INFO L93 Difference]: Finished difference Result 3661 states and 4592 transitions. [2021-12-14 16:18:13,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:18:13,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-14 16:18:13,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:13,072 INFO L225 Difference]: With dead ends: 3661 [2021-12-14 16:18:13,072 INFO L226 Difference]: Without dead ends: 3658 [2021-12-14 16:18:13,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-14 16:18:13,074 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 1263 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:13,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 1071 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:18:13,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-12-14 16:18:13,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 3381. [2021-12-14 16:18:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 2650 states have (on average 1.2739622641509434) internal successors, (3376), 2691 states have internal predecessors, (3376), 364 states have call successors, (364), 293 states have call predecessors, (364), 365 states have return successors, (522), 403 states have call predecessors, (522), 363 states have call successors, (522) [2021-12-14 16:18:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4262 transitions. [2021-12-14 16:18:13,230 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4262 transitions. Word has length 73 [2021-12-14 16:18:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:13,230 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 4262 transitions. [2021-12-14 16:18:13,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 16:18:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4262 transitions. [2021-12-14 16:18:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 16:18:13,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:13,232 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:13,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:18:13,233 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2001942744, now seen corresponding path program 1 times [2021-12-14 16:18:13,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:13,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542746302] [2021-12-14 16:18:13,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:13,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:13,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:13,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:13,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:13,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:13,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:13,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:13,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:13,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:13,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542746302] [2021-12-14 16:18:13,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542746302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:18:13,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74608002] [2021-12-14 16:18:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:13,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:18:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:18:13,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 16:18:13,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:18:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:13,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 16:18:13,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:18:13,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:13,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:18:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:14,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74608002] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:18:14,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:18:14,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-14 16:18:14,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606195914] [2021-12-14 16:18:14,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:18:14,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:18:14,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:14,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:18:14,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:18:14,023 INFO L87 Difference]: Start difference. First operand 3381 states and 4262 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-14 16:18:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:15,265 INFO L93 Difference]: Finished difference Result 7822 states and 9748 transitions. [2021-12-14 16:18:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 16:18:15,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-14 16:18:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:15,291 INFO L225 Difference]: With dead ends: 7822 [2021-12-14 16:18:15,291 INFO L226 Difference]: Without dead ends: 7819 [2021-12-14 16:18:15,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-14 16:18:15,294 INFO L933 BasicCegarLoop]: 596 mSDtfsCounter, 1633 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1698 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:15,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1698 Valid, 1742 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:18:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7819 states. [2021-12-14 16:18:15,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7819 to 5171. [2021-12-14 16:18:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 4054 states have (on average 1.27084361124815) internal successors, (5152), 4117 states have internal predecessors, (5152), 548 states have call successors, (548), 451 states have call predecessors, (548), 567 states have return successors, (800), 609 states have call predecessors, (800), 547 states have call successors, (800) [2021-12-14 16:18:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 6500 transitions. [2021-12-14 16:18:15,528 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 6500 transitions. Word has length 74 [2021-12-14 16:18:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:15,528 INFO L470 AbstractCegarLoop]: Abstraction has 5171 states and 6500 transitions. [2021-12-14 16:18:15,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-14 16:18:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 6500 transitions. [2021-12-14 16:18:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:18:15,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:15,531 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-14 16:18:15,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 16:18:15,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 16:18:15,748 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1151605564, now seen corresponding path program 2 times [2021-12-14 16:18:15,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:15,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789364502] [2021-12-14 16:18:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:15,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:15,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:15,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:15,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:15,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:15,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:15,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:15,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:15,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:15,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789364502] [2021-12-14 16:18:15,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789364502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:15,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:15,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:15,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746185062] [2021-12-14 16:18:15,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:15,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:15,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:15,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:15,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:15,795 INFO L87 Difference]: Start difference. First operand 5171 states and 6500 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 16:18:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:16,149 INFO L93 Difference]: Finished difference Result 7853 states and 9873 transitions. [2021-12-14 16:18:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 16:18:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-14 16:18:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:16,167 INFO L225 Difference]: With dead ends: 7853 [2021-12-14 16:18:16,167 INFO L226 Difference]: Without dead ends: 3778 [2021-12-14 16:18:16,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:18:16,176 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 926 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:16,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [955 Valid, 990 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:18:16,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2021-12-14 16:18:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3543. [2021-12-14 16:18:16,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 2782 states have (on average 1.2552120776419842) internal successors, (3492), 2823 states have internal predecessors, (3492), 380 states have call successors, (380), 307 states have call predecessors, (380), 379 states have return successors, (526), 419 states have call predecessors, (526), 379 states have call successors, (526) [2021-12-14 16:18:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 4398 transitions. [2021-12-14 16:18:16,330 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 4398 transitions. Word has length 77 [2021-12-14 16:18:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:16,331 INFO L470 AbstractCegarLoop]: Abstraction has 3543 states and 4398 transitions. [2021-12-14 16:18:16,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-14 16:18:16,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 4398 transitions. [2021-12-14 16:18:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-14 16:18:16,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:16,334 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:18:16,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:18:16,334 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:16,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:16,335 INFO L85 PathProgramCache]: Analyzing trace with hash -948888726, now seen corresponding path program 1 times [2021-12-14 16:18:16,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:16,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448391757] [2021-12-14 16:18:16,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:16,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:16,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:16,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:16,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:16,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:16,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:16,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:16,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:16,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-14 16:18:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:18:16,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:16,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448391757] [2021-12-14 16:18:16,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448391757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:16,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:16,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:18:16,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154861388] [2021-12-14 16:18:16,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:18:16,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:18:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:18:16,400 INFO L87 Difference]: Start difference. First operand 3543 states and 4398 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:18:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:17,335 INFO L93 Difference]: Finished difference Result 10399 states and 12779 transitions. [2021-12-14 16:18:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 16:18:17,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-14 16:18:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:17,355 INFO L225 Difference]: With dead ends: 10399 [2021-12-14 16:18:17,355 INFO L226 Difference]: Without dead ends: 5778 [2021-12-14 16:18:17,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-14 16:18:17,367 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 774 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:17,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 1582 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:17,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5778 states. [2021-12-14 16:18:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5778 to 5458. [2021-12-14 16:18:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5458 states, 4240 states have (on average 1.2308962264150944) internal successors, (5219), 4324 states have internal predecessors, (5219), 584 states have call successors, (584), 481 states have call predecessors, (584), 632 states have return successors, (908), 659 states have call predecessors, (908), 583 states have call successors, (908) [2021-12-14 16:18:17,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5458 states to 5458 states and 6711 transitions. [2021-12-14 16:18:17,562 INFO L78 Accepts]: Start accepts. Automaton has 5458 states and 6711 transitions. Word has length 84 [2021-12-14 16:18:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:17,563 INFO L470 AbstractCegarLoop]: Abstraction has 5458 states and 6711 transitions. [2021-12-14 16:18:17,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:18:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 5458 states and 6711 transitions. [2021-12-14 16:18:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 16:18:17,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:17,566 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-14 16:18:17,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:18:17,567 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:17,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1201115614, now seen corresponding path program 1 times [2021-12-14 16:18:17,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:17,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594751927] [2021-12-14 16:18:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:17,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:17,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:17,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 16:18:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:17,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 16:18:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:17,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 16:18:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:17,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-14 16:18:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:17,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-14 16:18:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:17,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-14 16:18:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:17,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 16:18:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 16:18:17,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:17,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594751927] [2021-12-14 16:18:17,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594751927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:17,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:17,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 16:18:17,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805705042] [2021-12-14 16:18:17,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:17,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 16:18:17,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 16:18:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:17,622 INFO L87 Difference]: Start difference. First operand 5458 states and 6711 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:18:18,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:18,532 INFO L93 Difference]: Finished difference Result 9461 states and 11551 transitions. [2021-12-14 16:18:18,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-14 16:18:18,533 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-14 16:18:18,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:18,551 INFO L225 Difference]: With dead ends: 9461 [2021-12-14 16:18:18,551 INFO L226 Difference]: Without dead ends: 4868 [2021-12-14 16:18:18,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-14 16:18:18,562 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 1709 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1748 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:18,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1748 Valid, 1395 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 16:18:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2021-12-14 16:18:18,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 4534. [2021-12-14 16:18:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4534 states, 3529 states have (on average 1.2235760838764522) internal successors, (4318), 3595 states have internal predecessors, (4318), 485 states have call successors, (485), 396 states have call predecessors, (485), 518 states have return successors, (686), 549 states have call predecessors, (686), 484 states have call successors, (686) [2021-12-14 16:18:18,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 5489 transitions. [2021-12-14 16:18:18,713 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 5489 transitions. Word has length 93 [2021-12-14 16:18:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:18,714 INFO L470 AbstractCegarLoop]: Abstraction has 4534 states and 5489 transitions. [2021-12-14 16:18:18,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 16:18:18,714 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 5489 transitions. [2021-12-14 16:18:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:18,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:18,717 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:18,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:18:18,717 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:18,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:18,718 INFO L85 PathProgramCache]: Analyzing trace with hash 198003052, now seen corresponding path program 1 times [2021-12-14 16:18:18,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:18,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258302126] [2021-12-14 16:18:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:18,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:18,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:18,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:18,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:18,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:18,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:18,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:18,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258302126] [2021-12-14 16:18:18,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258302126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:18,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:18,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:18:18,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145317094] [2021-12-14 16:18:18,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:18,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:18:18,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:18,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:18:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:18:18,786 INFO L87 Difference]: Start difference. First operand 4534 states and 5489 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:19,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:19,513 INFO L93 Difference]: Finished difference Result 4791 states and 5893 transitions. [2021-12-14 16:18:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:18:19,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:19,530 INFO L225 Difference]: With dead ends: 4791 [2021-12-14 16:18:19,531 INFO L226 Difference]: Without dead ends: 4599 [2021-12-14 16:18:19,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:18:19,535 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 605 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:19,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 861 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2021-12-14 16:18:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4534. [2021-12-14 16:18:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4534 states, 3529 states have (on average 1.2232927174837065) internal successors, (4317), 3595 states have internal predecessors, (4317), 485 states have call successors, (485), 396 states have call predecessors, (485), 518 states have return successors, (686), 549 states have call predecessors, (686), 484 states have call successors, (686) [2021-12-14 16:18:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 5488 transitions. [2021-12-14 16:18:19,862 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 5488 transitions. Word has length 101 [2021-12-14 16:18:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:19,862 INFO L470 AbstractCegarLoop]: Abstraction has 4534 states and 5488 transitions. [2021-12-14 16:18:19,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 5488 transitions. [2021-12-14 16:18:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:19,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:19,866 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:19,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:18:19,866 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:19,867 INFO L85 PathProgramCache]: Analyzing trace with hash 968736618, now seen corresponding path program 1 times [2021-12-14 16:18:19,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:19,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663441859] [2021-12-14 16:18:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:19,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:19,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:19,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:19,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:19,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:19,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:19,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:19,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663441859] [2021-12-14 16:18:19,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663441859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:19,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:19,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 16:18:19,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484265592] [2021-12-14 16:18:19,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:19,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:18:19,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:19,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:18:19,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:18:19,931 INFO L87 Difference]: Start difference. First operand 4534 states and 5488 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:21,106 INFO L93 Difference]: Finished difference Result 5046 states and 6295 transitions. [2021-12-14 16:18:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:18:21,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:21,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:21,119 INFO L225 Difference]: With dead ends: 5046 [2021-12-14 16:18:21,119 INFO L226 Difference]: Without dead ends: 4857 [2021-12-14 16:18:21,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:18:21,122 INFO L933 BasicCegarLoop]: 473 mSDtfsCounter, 967 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:21,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 1176 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 16:18:21,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4857 states. [2021-12-14 16:18:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4857 to 4728. [2021-12-14 16:18:21,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4728 states, 3702 states have (on average 1.2387898433279307) internal successors, (4586), 3769 states have internal predecessors, (4586), 499 states have call successors, (499), 402 states have call predecessors, (499), 525 states have return successors, (703), 563 states have call predecessors, (703), 498 states have call successors, (703) [2021-12-14 16:18:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4728 states to 4728 states and 5788 transitions. [2021-12-14 16:18:21,369 INFO L78 Accepts]: Start accepts. Automaton has 4728 states and 5788 transitions. Word has length 101 [2021-12-14 16:18:21,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:21,370 INFO L470 AbstractCegarLoop]: Abstraction has 4728 states and 5788 transitions. [2021-12-14 16:18:21,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:21,370 INFO L276 IsEmpty]: Start isEmpty. Operand 4728 states and 5788 transitions. [2021-12-14 16:18:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:21,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:21,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:21,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:18:21,374 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:21,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1449747860, now seen corresponding path program 1 times [2021-12-14 16:18:21,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:21,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680652760] [2021-12-14 16:18:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:21,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:21,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:21,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:21,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:21,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:21,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:21,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:21,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680652760] [2021-12-14 16:18:21,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680652760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:21,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:21,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:21,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563059702] [2021-12-14 16:18:21,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:21,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:21,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:21,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:21,479 INFO L87 Difference]: Start difference. First operand 4728 states and 5788 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:22,890 INFO L93 Difference]: Finished difference Result 5506 states and 7012 transitions. [2021-12-14 16:18:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:22,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:22,900 INFO L225 Difference]: With dead ends: 5506 [2021-12-14 16:18:22,900 INFO L226 Difference]: Without dead ends: 5123 [2021-12-14 16:18:22,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:18:22,903 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 972 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 1679 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:22,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 1850 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1679 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:18:22,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2021-12-14 16:18:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 4910. [2021-12-14 16:18:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 3863 states have (on average 1.250582448873932) internal successors, (4831), 3931 states have internal predecessors, (4831), 513 states have call successors, (513), 408 states have call predecessors, (513), 532 states have return successors, (719), 578 states have call predecessors, (719), 512 states have call successors, (719) [2021-12-14 16:18:23,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 6063 transitions. [2021-12-14 16:18:23,097 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 6063 transitions. Word has length 101 [2021-12-14 16:18:23,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:23,098 INFO L470 AbstractCegarLoop]: Abstraction has 4910 states and 6063 transitions. [2021-12-14 16:18:23,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:23,098 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 6063 transitions. [2021-12-14 16:18:23,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:23,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:23,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:23,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:18:23,101 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:23,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:23,102 INFO L85 PathProgramCache]: Analyzing trace with hash -124891666, now seen corresponding path program 1 times [2021-12-14 16:18:23,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:23,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600797408] [2021-12-14 16:18:23,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:23,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:23,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:23,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:23,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:23,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:23,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:23,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:23,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:23,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600797408] [2021-12-14 16:18:23,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600797408] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:23,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:23,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:23,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023633717] [2021-12-14 16:18:23,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:23,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:23,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:23,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:23,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:23,165 INFO L87 Difference]: Start difference. First operand 4910 states and 6063 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:24,580 INFO L93 Difference]: Finished difference Result 6181 states and 8055 transitions. [2021-12-14 16:18:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:24,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:24,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:24,594 INFO L225 Difference]: With dead ends: 6181 [2021-12-14 16:18:24,594 INFO L226 Difference]: Without dead ends: 5616 [2021-12-14 16:18:24,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:18:24,598 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 968 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 1839 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:24,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [990 Valid, 1839 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:18:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5616 states. [2021-12-14 16:18:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5616 to 5277. [2021-12-14 16:18:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5277 states, 4188 states have (on average 1.2717287488061126) internal successors, (5326), 4258 states have internal predecessors, (5326), 541 states have call successors, (541), 420 states have call predecessors, (541), 546 states have return successors, (755), 608 states have call predecessors, (755), 540 states have call successors, (755) [2021-12-14 16:18:24,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5277 states to 5277 states and 6622 transitions. [2021-12-14 16:18:24,849 INFO L78 Accepts]: Start accepts. Automaton has 5277 states and 6622 transitions. Word has length 101 [2021-12-14 16:18:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:24,849 INFO L470 AbstractCegarLoop]: Abstraction has 5277 states and 6622 transitions. [2021-12-14 16:18:24,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:24,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5277 states and 6622 transitions. [2021-12-14 16:18:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:24,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:24,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:24,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:18:24,853 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:24,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:24,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1441866284, now seen corresponding path program 1 times [2021-12-14 16:18:24,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:24,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478363471] [2021-12-14 16:18:24,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:24,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:24,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:24,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:24,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:24,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:24,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:24,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:24,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478363471] [2021-12-14 16:18:24,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478363471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:24,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:24,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:24,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140894029] [2021-12-14 16:18:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:24,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:24,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:24,915 INFO L87 Difference]: Start difference. First operand 5277 states and 6622 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:26,398 INFO L93 Difference]: Finished difference Result 7490 states and 10074 transitions. [2021-12-14 16:18:26,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 16:18:26,399 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:26,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:26,412 INFO L225 Difference]: With dead ends: 7490 [2021-12-14 16:18:26,413 INFO L226 Difference]: Without dead ends: 6558 [2021-12-14 16:18:26,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:18:26,417 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 967 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:26,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 1834 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:18:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6558 states. [2021-12-14 16:18:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6558 to 6014. [2021-12-14 16:18:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 4841 states have (on average 1.305515389382359) internal successors, (6320), 4915 states have internal predecessors, (6320), 597 states have call successors, (597), 444 states have call predecessors, (597), 574 states have return successors, (833), 668 states have call predecessors, (833), 596 states have call successors, (833) [2021-12-14 16:18:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 7750 transitions. [2021-12-14 16:18:26,681 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 7750 transitions. Word has length 101 [2021-12-14 16:18:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:26,681 INFO L470 AbstractCegarLoop]: Abstraction has 6014 states and 7750 transitions. [2021-12-14 16:18:26,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 7750 transitions. [2021-12-14 16:18:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:26,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:26,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:26,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:18:26,686 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:26,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:26,687 INFO L85 PathProgramCache]: Analyzing trace with hash 384028206, now seen corresponding path program 1 times [2021-12-14 16:18:26,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:26,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623361939] [2021-12-14 16:18:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:26,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:26,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:26,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:26,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:26,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:26,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:26,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623361939] [2021-12-14 16:18:26,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623361939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:26,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:26,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:26,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724369510] [2021-12-14 16:18:26,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:26,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:26,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:26,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:26,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:26,776 INFO L87 Difference]: Start difference. First operand 6014 states and 7750 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:27,663 INFO L93 Difference]: Finished difference Result 8230 states and 11231 transitions. [2021-12-14 16:18:27,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:18:27,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:27,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:27,679 INFO L225 Difference]: With dead ends: 8230 [2021-12-14 16:18:27,680 INFO L226 Difference]: Without dead ends: 6561 [2021-12-14 16:18:27,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 16:18:27,688 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 896 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:27,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 960 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:18:27,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6561 states. [2021-12-14 16:18:27,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6561 to 6014. [2021-12-14 16:18:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 4841 states have (on average 1.3036562693658336) internal successors, (6311), 4915 states have internal predecessors, (6311), 597 states have call successors, (597), 444 states have call predecessors, (597), 574 states have return successors, (833), 668 states have call predecessors, (833), 596 states have call successors, (833) [2021-12-14 16:18:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 7741 transitions. [2021-12-14 16:18:27,993 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 7741 transitions. Word has length 101 [2021-12-14 16:18:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:27,994 INFO L470 AbstractCegarLoop]: Abstraction has 6014 states and 7741 transitions. [2021-12-14 16:18:27,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 7741 transitions. [2021-12-14 16:18:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:27,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:27,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:27,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:18:27,999 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:27,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:27,999 INFO L85 PathProgramCache]: Analyzing trace with hash -758474260, now seen corresponding path program 1 times [2021-12-14 16:18:27,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:27,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666659222] [2021-12-14 16:18:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:28,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:28,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:28,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:28,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:28,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:28,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:28,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:28,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666659222] [2021-12-14 16:18:28,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666659222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:28,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:28,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:28,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436120242] [2021-12-14 16:18:28,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:28,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:28,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:28,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:28,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:28,073 INFO L87 Difference]: Start difference. First operand 6014 states and 7741 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:29,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:29,804 INFO L93 Difference]: Finished difference Result 10731 states and 15014 transitions. [2021-12-14 16:18:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:18:29,805 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:29,821 INFO L225 Difference]: With dead ends: 10731 [2021-12-14 16:18:29,822 INFO L226 Difference]: Without dead ends: 9062 [2021-12-14 16:18:29,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:18:29,828 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 1012 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:29,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1033 Valid, 1901 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:18:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9062 states. [2021-12-14 16:18:30,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9062 to 7480. [2021-12-14 16:18:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7480 states, 6147 states have (on average 1.3494387506100536) internal successors, (8295), 6229 states have internal predecessors, (8295), 701 states have call successors, (701), 492 states have call predecessors, (701), 630 states have return successors, (999), 780 states have call predecessors, (999), 700 states have call successors, (999) [2021-12-14 16:18:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7480 states to 7480 states and 9995 transitions. [2021-12-14 16:18:30,172 INFO L78 Accepts]: Start accepts. Automaton has 7480 states and 9995 transitions. Word has length 101 [2021-12-14 16:18:30,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:30,172 INFO L470 AbstractCegarLoop]: Abstraction has 7480 states and 9995 transitions. [2021-12-14 16:18:30,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 7480 states and 9995 transitions. [2021-12-14 16:18:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:30,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:30,178 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:30,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 16:18:30,178 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:30,179 INFO L85 PathProgramCache]: Analyzing trace with hash -518234514, now seen corresponding path program 1 times [2021-12-14 16:18:30,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:30,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034836602] [2021-12-14 16:18:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:30,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:30,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:30,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:30,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:30,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:30,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:30,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:30,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034836602] [2021-12-14 16:18:30,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034836602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:30,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:30,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:30,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158569922] [2021-12-14 16:18:30,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:30,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:30,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:30,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:30,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:30,242 INFO L87 Difference]: Start difference. First operand 7480 states and 9995 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:32,114 INFO L93 Difference]: Finished difference Result 16339 states and 23690 transitions. [2021-12-14 16:18:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:18:32,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:32,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:32,152 INFO L225 Difference]: With dead ends: 16339 [2021-12-14 16:18:32,153 INFO L226 Difference]: Without dead ends: 13204 [2021-12-14 16:18:32,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:18:32,170 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1131 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:32,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 1804 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1612 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:18:32,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13204 states. [2021-12-14 16:18:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13204 to 10321. [2021-12-14 16:18:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10321 states, 8676 states have (on average 1.3989165514061779) internal successors, (12137), 8774 states have internal predecessors, (12137), 901 states have call successors, (901), 588 states have call predecessors, (901), 742 states have return successors, (1377), 996 states have call predecessors, (1377), 900 states have call successors, (1377) [2021-12-14 16:18:32,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10321 states to 10321 states and 14415 transitions. [2021-12-14 16:18:32,695 INFO L78 Accepts]: Start accepts. Automaton has 10321 states and 14415 transitions. Word has length 101 [2021-12-14 16:18:32,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:32,696 INFO L470 AbstractCegarLoop]: Abstraction has 10321 states and 14415 transitions. [2021-12-14 16:18:32,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:32,696 INFO L276 IsEmpty]: Start isEmpty. Operand 10321 states and 14415 transitions. [2021-12-14 16:18:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:32,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:32,704 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:32,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 16:18:32,704 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:32,704 INFO L85 PathProgramCache]: Analyzing trace with hash 320799148, now seen corresponding path program 1 times [2021-12-14 16:18:32,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:32,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508663779] [2021-12-14 16:18:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:32,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:32,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:32,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:32,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508663779] [2021-12-14 16:18:32,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508663779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:32,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:32,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:32,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101814194] [2021-12-14 16:18:32,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:32,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:32,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:32,772 INFO L87 Difference]: Start difference. First operand 10321 states and 14415 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:35,068 INFO L93 Difference]: Finished difference Result 27018 states and 40384 transitions. [2021-12-14 16:18:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:18:35,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:35,120 INFO L225 Difference]: With dead ends: 27018 [2021-12-14 16:18:35,121 INFO L226 Difference]: Without dead ends: 21042 [2021-12-14 16:18:35,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:18:35,142 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 1032 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1652 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 1787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:35,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 1414 Invalid, 1787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1652 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:18:35,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21042 states. [2021-12-14 16:18:35,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21042 to 16066. [2021-12-14 16:18:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16066 states, 13813 states have (on average 1.4452327517555925) internal successors, (19963), 13943 states have internal predecessors, (19963), 1285 states have call successors, (1285), 780 states have call predecessors, (1285), 966 states have return successors, (2279), 1412 states have call predecessors, (2279), 1284 states have call successors, (2279) [2021-12-14 16:18:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16066 states to 16066 states and 23527 transitions. [2021-12-14 16:18:35,938 INFO L78 Accepts]: Start accepts. Automaton has 16066 states and 23527 transitions. Word has length 101 [2021-12-14 16:18:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:35,938 INFO L470 AbstractCegarLoop]: Abstraction has 16066 states and 23527 transitions. [2021-12-14 16:18:35,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 16066 states and 23527 transitions. [2021-12-14 16:18:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:35,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:35,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:35,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 16:18:35,948 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:35,949 INFO L85 PathProgramCache]: Analyzing trace with hash 347864750, now seen corresponding path program 1 times [2021-12-14 16:18:35,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:35,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563373313] [2021-12-14 16:18:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:35,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:35,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:36,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:36,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563373313] [2021-12-14 16:18:36,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563373313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:36,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:36,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:36,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560173453] [2021-12-14 16:18:36,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:36,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:36,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:36,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:36,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:36,011 INFO L87 Difference]: Start difference. First operand 16066 states and 23527 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:38,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:38,839 INFO L93 Difference]: Finished difference Result 47031 states and 72418 transitions. [2021-12-14 16:18:38,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:18:38,840 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:38,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:38,954 INFO L225 Difference]: With dead ends: 47031 [2021-12-14 16:18:38,954 INFO L226 Difference]: Without dead ends: 35310 [2021-12-14 16:18:38,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:18:38,992 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 1012 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:38,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1040 Valid, 1792 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 16:18:39,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35310 states. [2021-12-14 16:18:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35310 to 27588. [2021-12-14 16:18:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27588 states, 24151 states have (on average 1.4813051219411204) internal successors, (35775), 24345 states have internal predecessors, (35775), 2021 states have call successors, (2021), 1164 states have call predecessors, (2021), 1414 states have return successors, (4537), 2212 states have call predecessors, (4537), 2020 states have call successors, (4537) [2021-12-14 16:18:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27588 states to 27588 states and 42333 transitions. [2021-12-14 16:18:40,593 INFO L78 Accepts]: Start accepts. Automaton has 27588 states and 42333 transitions. Word has length 101 [2021-12-14 16:18:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:40,593 INFO L470 AbstractCegarLoop]: Abstraction has 27588 states and 42333 transitions. [2021-12-14 16:18:40,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:40,594 INFO L276 IsEmpty]: Start isEmpty. Operand 27588 states and 42333 transitions. [2021-12-14 16:18:40,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:40,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:40,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:40,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-14 16:18:40,610 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:40,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:40,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2081969200, now seen corresponding path program 1 times [2021-12-14 16:18:40,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:40,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477958195] [2021-12-14 16:18:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:40,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:40,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:40,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:40,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477958195] [2021-12-14 16:18:40,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477958195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:40,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:40,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:40,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266550578] [2021-12-14 16:18:40,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:40,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:40,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:40,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:40,678 INFO L87 Difference]: Start difference. First operand 27588 states and 42333 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:45,108 INFO L93 Difference]: Finished difference Result 86903 states and 138090 transitions. [2021-12-14 16:18:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 16:18:45,108 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:45,321 INFO L225 Difference]: With dead ends: 86903 [2021-12-14 16:18:45,321 INFO L226 Difference]: Without dead ends: 63660 [2021-12-14 16:18:45,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:18:45,395 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 957 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:45,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 1800 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 16:18:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63660 states. [2021-12-14 16:18:47,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63660 to 50565. [2021-12-14 16:18:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50565 states, 44824 states have (on average 1.5049303944315546) internal successors, (67457), 45146 states have internal predecessors, (67457), 3429 states have call successors, (3429), 1932 states have call predecessors, (3429), 2310 states have return successors, (10447), 3748 states have call predecessors, (10447), 3428 states have call successors, (10447) [2021-12-14 16:18:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50565 states to 50565 states and 81333 transitions. [2021-12-14 16:18:48,099 INFO L78 Accepts]: Start accepts. Automaton has 50565 states and 81333 transitions. Word has length 101 [2021-12-14 16:18:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:48,099 INFO L470 AbstractCegarLoop]: Abstraction has 50565 states and 81333 transitions. [2021-12-14 16:18:48,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:48,100 INFO L276 IsEmpty]: Start isEmpty. Operand 50565 states and 81333 transitions. [2021-12-14 16:18:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:48,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:48,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:48,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-14 16:18:48,133 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:48,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:48,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1325775250, now seen corresponding path program 1 times [2021-12-14 16:18:48,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:48,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126081666] [2021-12-14 16:18:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:48,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:48,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:48,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126081666] [2021-12-14 16:18:48,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126081666] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:48,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:48,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:48,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533052197] [2021-12-14 16:18:48,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:48,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:48,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:48,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:48,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:48,203 INFO L87 Difference]: Start difference. First operand 50565 states and 81333 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:18:54,944 INFO L93 Difference]: Finished difference Result 133383 states and 211647 transitions. [2021-12-14 16:18:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 16:18:54,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 16:18:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:18:55,245 INFO L225 Difference]: With dead ends: 133383 [2021-12-14 16:18:55,245 INFO L226 Difference]: Without dead ends: 87164 [2021-12-14 16:18:55,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-14 16:18:55,356 INFO L933 BasicCegarLoop]: 431 mSDtfsCounter, 651 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:18:55,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 1547 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 16:18:55,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87164 states. [2021-12-14 16:18:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87164 to 51336. [2021-12-14 16:18:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51336 states, 45595 states have (on average 1.4963921482618707) internal successors, (68228), 45917 states have internal predecessors, (68228), 3429 states have call successors, (3429), 1932 states have call predecessors, (3429), 2310 states have return successors, (10447), 3748 states have call predecessors, (10447), 3428 states have call successors, (10447) [2021-12-14 16:18:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51336 states to 51336 states and 82104 transitions. [2021-12-14 16:18:58,698 INFO L78 Accepts]: Start accepts. Automaton has 51336 states and 82104 transitions. Word has length 101 [2021-12-14 16:18:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:18:58,699 INFO L470 AbstractCegarLoop]: Abstraction has 51336 states and 82104 transitions. [2021-12-14 16:18:58,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 16:18:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 51336 states and 82104 transitions. [2021-12-14 16:18:58,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 16:18:58,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:18:58,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:18:58,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-14 16:18:58,725 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:18:58,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:18:58,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1283012208, now seen corresponding path program 1 times [2021-12-14 16:18:58,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:18:58,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238059944] [2021-12-14 16:18:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:18:58,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:18:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 16:18:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 16:18:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 16:18:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 16:18:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 16:18:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:18:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:18:58,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:18:58,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238059944] [2021-12-14 16:18:58,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238059944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:18:58,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:18:58,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 16:18:58,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835554497] [2021-12-14 16:18:58,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:18:58,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 16:18:58,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:18:58,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 16:18:58,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:18:58,814 INFO L87 Difference]: Start difference. First operand 51336 states and 82104 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)