./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.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 b3322c0c768700658989b53a570d5dd58dc6c9ba5f33ff303fa538b570ca8619 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:32:58,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:32:58,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:32:58,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:32:58,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:32:58,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:32:58,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:32:58,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:32:58,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:32:58,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:32:58,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:32:58,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:32:58,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:32:58,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:32:58,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:32:58,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:32:58,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:32:58,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:32:58,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:32:58,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:32:58,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:32:58,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:32:58,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:32:58,105 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:32:58,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:32:58,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:32:58,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:32:58,111 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:32:58,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:32:58,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:32:58,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:32:58,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:32:58,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:32:58,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:32:58,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:32:58,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:32:58,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:32:58,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:32:58,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:32:58,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:32:58,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:32:58,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:32:58,166 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:32:58,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:32:58,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:32:58,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:32:58,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:32:58,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:32:58,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:32:58,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:32:58,169 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:32:58,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:32:58,171 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:32:58,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:32:58,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:32:58,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:32:58,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:32:58,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:32:58,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:32:58,172 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:32:58,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:32:58,172 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:32:58,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:32:58,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:32:58,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:32:58,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:32:58,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:32:58,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:32:58,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:32:58,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:32:58,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:32:58,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:32:58,174 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:32:58,174 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:32:58,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:32:58,174 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3322c0c768700658989b53a570d5dd58dc6c9ba5f33ff303fa538b570ca8619 [2021-12-28 02:32:58,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:32:58,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:32:58,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:32:58,463 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:32:58,464 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:32:58,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c [2021-12-28 02:32:58,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90fd561cc/c57e0a24c0cc423092e73848def29f02/FLAGa90cda165 [2021-12-28 02:32:58,981 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:32:58,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c [2021-12-28 02:32:58,997 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90fd561cc/c57e0a24c0cc423092e73848def29f02/FLAGa90cda165 [2021-12-28 02:32:59,014 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90fd561cc/c57e0a24c0cc423092e73848def29f02 [2021-12-28 02:32:59,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:32:59,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:32:59,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:32:59,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:32:59,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:32:59,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef92a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59, skipping insertion in model container [2021-12-28 02:32:59,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,030 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:32:59,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:32:59,199 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.11.cil-2.c[914,927] [2021-12-28 02:32:59,317 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.11.cil-2.c[7115,7128] [2021-12-28 02:32:59,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:32:59,488 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:32:59,508 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.11.cil-2.c[914,927] [2021-12-28 02:32:59,535 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.11.cil-2.c[7115,7128] [2021-12-28 02:32:59,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:32:59,595 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:32:59,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59 WrapperNode [2021-12-28 02:32:59,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:32:59,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:32:59,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:32:59,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:32:59,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,697 INFO L137 Inliner]: procedures = 75, calls = 90, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 982 [2021-12-28 02:32:59,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:32:59,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:32:59,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:32:59,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:32:59,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,760 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:32:59,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:32:59,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:32:59,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:32:59,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:32:59,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:59,809 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) [2021-12-28 02:32:59,846 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 [2021-12-28 02:32:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:32:59,857 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:32:59,857 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:32:59,858 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-28 02:32:59,858 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-28 02:32:59,858 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:32:59,858 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:32:59,858 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:32:59,858 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:32:59,858 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-28 02:32:59,858 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-28 02:32:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:32:59,859 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:32:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:32:59,859 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:32:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-28 02:32:59,859 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-28 02:32:59,859 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-28 02:32:59,859 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-28 02:32:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-28 02:32:59,860 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-28 02:32:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:32:59,860 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:32:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:32:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:32:59,860 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:32:59,860 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-28 02:32:59,861 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-28 02:32:59,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:32:59,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:32:59,861 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:32:59,861 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:32:59,958 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:32:59,972 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:33:00,711 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:33:00,734 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:33:00,735 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-12-28 02:33:00,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:33:00 BoogieIcfgContainer [2021-12-28 02:33:00,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:33:00,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:33:00,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:33:00,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:33:00,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:32:59" (1/3) ... [2021-12-28 02:33:00,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2902d387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:33:00, skipping insertion in model container [2021-12-28 02:33:00,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (2/3) ... [2021-12-28 02:33:00,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2902d387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:33:00, skipping insertion in model container [2021-12-28 02:33:00,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:33:00" (3/3) ... [2021-12-28 02:33:00,747 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.11.cil-2.c [2021-12-28 02:33:00,751 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:33:00,751 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:33:00,798 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:33:00,805 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 [2021-12-28 02:33:00,806 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:33:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 458 states, 402 states have (on average 1.63681592039801) internal successors, (658), 408 states have internal predecessors, (658), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-28 02:33:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:00,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:00,846 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] [2021-12-28 02:33:00,847 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:00,852 INFO L85 PathProgramCache]: Analyzing trace with hash -978370307, now seen corresponding path program 1 times [2021-12-28 02:33:00,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:00,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226952367] [2021-12-28 02:33:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:00,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:01,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:01,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226952367] [2021-12-28 02:33:01,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226952367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:01,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:01,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:01,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16998130] [2021-12-28 02:33:01,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:01,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:01,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:01,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:01,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:01,270 INFO L87 Difference]: Start difference. First operand has 458 states, 402 states have (on average 1.63681592039801) internal successors, (658), 408 states have internal predecessors, (658), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) 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) [2021-12-28 02:33:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:02,370 INFO L93 Difference]: Finished difference Result 1024 states and 1632 transitions. [2021-12-28 02:33:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:02,373 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 [2021-12-28 02:33:02,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:02,384 INFO L225 Difference]: With dead ends: 1024 [2021-12-28 02:33:02,384 INFO L226 Difference]: Without dead ends: 583 [2021-12-28 02:33:02,388 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 [2021-12-28 02:33:02,391 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 810 mSDsluCounter, 1930 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 2629 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:02,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 2629 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:02,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-12-28 02:33:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 544. [2021-12-28 02:33:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 470 states have (on average 1.5212765957446808) internal successors, (715), 476 states have internal predecessors, (715), 50 states have call successors, (50), 21 states have call predecessors, (50), 22 states have return successors, (53), 49 states have call predecessors, (53), 48 states have call successors, (53) [2021-12-28 02:33:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 818 transitions. [2021-12-28 02:33:02,449 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 818 transitions. Word has length 65 [2021-12-28 02:33:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:02,449 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 818 transitions. [2021-12-28 02:33:02,450 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) [2021-12-28 02:33:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 818 transitions. [2021-12-28 02:33:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:02,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:02,453 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] [2021-12-28 02:33:02,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:33:02,453 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:02,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:02,454 INFO L85 PathProgramCache]: Analyzing trace with hash 700518333, now seen corresponding path program 1 times [2021-12-28 02:33:02,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:02,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495094574] [2021-12-28 02:33:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:02,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:02,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:02,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495094574] [2021-12-28 02:33:02,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495094574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:02,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:02,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:02,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395725707] [2021-12-28 02:33:02,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:02,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:02,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:02,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:02,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:02,562 INFO L87 Difference]: Start difference. First operand 544 states and 818 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) [2021-12-28 02:33:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:03,538 INFO L93 Difference]: Finished difference Result 891 states and 1295 transitions. [2021-12-28 02:33:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:33:03,539 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 [2021-12-28 02:33:03,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:03,543 INFO L225 Difference]: With dead ends: 891 [2021-12-28 02:33:03,543 INFO L226 Difference]: Without dead ends: 714 [2021-12-28 02:33:03,544 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 [2021-12-28 02:33:03,545 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 1354 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:03,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 2323 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:33:03,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-12-28 02:33:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 640. [2021-12-28 02:33:03,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 546 states have (on average 1.5) internal successors, (819), 554 states have internal predecessors, (819), 61 states have call successors, (61), 28 states have call predecessors, (61), 31 states have return successors, (72), 61 states have call predecessors, (72), 59 states have call successors, (72) [2021-12-28 02:33:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 952 transitions. [2021-12-28 02:33:03,580 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 952 transitions. Word has length 65 [2021-12-28 02:33:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:03,580 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 952 transitions. [2021-12-28 02:33:03,580 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) [2021-12-28 02:33:03,581 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 952 transitions. [2021-12-28 02:33:03,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:03,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:03,583 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] [2021-12-28 02:33:03,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:33:03,583 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:03,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:03,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1328067777, now seen corresponding path program 1 times [2021-12-28 02:33:03,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:03,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325135291] [2021-12-28 02:33:03,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:03,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:03,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:03,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325135291] [2021-12-28 02:33:03,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325135291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:03,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:03,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:03,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608902077] [2021-12-28 02:33:03,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:03,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:03,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:03,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:03,693 INFO L87 Difference]: Start difference. First operand 640 states and 952 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) [2021-12-28 02:33:04,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:04,579 INFO L93 Difference]: Finished difference Result 941 states and 1366 transitions. [2021-12-28 02:33:04,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:33:04,580 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 [2021-12-28 02:33:04,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:04,583 INFO L225 Difference]: With dead ends: 941 [2021-12-28 02:33:04,583 INFO L226 Difference]: Without dead ends: 674 [2021-12-28 02:33:04,584 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 [2021-12-28 02:33:04,585 INFO L933 BasicCegarLoop]: 671 mSDtfsCounter, 909 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:04,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 2666 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:33:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-28 02:33:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 645. [2021-12-28 02:33:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 550 states have (on average 1.4927272727272727) internal successors, (821), 558 states have internal predecessors, (821), 61 states have call successors, (61), 28 states have call predecessors, (61), 32 states have return successors, (73), 62 states have call predecessors, (73), 59 states have call successors, (73) [2021-12-28 02:33:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 955 transitions. [2021-12-28 02:33:04,627 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 955 transitions. Word has length 65 [2021-12-28 02:33:04,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:04,628 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 955 transitions. [2021-12-28 02:33:04,628 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) [2021-12-28 02:33:04,628 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 955 transitions. [2021-12-28 02:33:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:04,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:04,630 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] [2021-12-28 02:33:04,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:33:04,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:04,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1937540221, now seen corresponding path program 1 times [2021-12-28 02:33:04,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:04,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497990193] [2021-12-28 02:33:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:04,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:04,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:04,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497990193] [2021-12-28 02:33:04,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497990193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:04,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:04,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 02:33:04,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540689325] [2021-12-28 02:33:04,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:04,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:33:04,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:04,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:33:04,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:04,764 INFO L87 Difference]: Start difference. First operand 645 states and 955 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:33:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:06,063 INFO L93 Difference]: Finished difference Result 1967 states and 2751 transitions. [2021-12-28 02:33:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:33:06,063 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-28 02:33:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:06,071 INFO L225 Difference]: With dead ends: 1967 [2021-12-28 02:33:06,071 INFO L226 Difference]: Without dead ends: 1677 [2021-12-28 02:33:06,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 02:33:06,080 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 3866 mSDsluCounter, 1684 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3884 SdHoareTripleChecker+Valid, 2454 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:06,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3884 Valid, 2454 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:06,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-12-28 02:33:06,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1546. [2021-12-28 02:33:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1265 states have (on average 1.391304347826087) internal successors, (1760), 1288 states have internal predecessors, (1760), 149 states have call successors, (149), 111 states have call predecessors, (149), 130 states have return successors, (187), 149 states have call predecessors, (187), 147 states have call successors, (187) [2021-12-28 02:33:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2096 transitions. [2021-12-28 02:33:06,147 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2096 transitions. Word has length 65 [2021-12-28 02:33:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:06,148 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 2096 transitions. [2021-12-28 02:33:06,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:33:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2096 transitions. [2021-12-28 02:33:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:06,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:06,150 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] [2021-12-28 02:33:06,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:33:06,150 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:06,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1305977986, now seen corresponding path program 1 times [2021-12-28 02:33:06,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:06,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794515835] [2021-12-28 02:33:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:06,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:06,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:06,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794515835] [2021-12-28 02:33:06,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794515835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:06,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:06,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:06,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610986872] [2021-12-28 02:33:06,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:06,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:06,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:06,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:06,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:06,296 INFO L87 Difference]: Start difference. First operand 1546 states and 2096 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) [2021-12-28 02:33:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:07,151 INFO L93 Difference]: Finished difference Result 2837 states and 3769 transitions. [2021-12-28 02:33:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:33:07,151 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 [2021-12-28 02:33:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:07,156 INFO L225 Difference]: With dead ends: 2837 [2021-12-28 02:33:07,156 INFO L226 Difference]: Without dead ends: 1652 [2021-12-28 02:33:07,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:33:07,159 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 910 mSDsluCounter, 1995 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 2662 SdHoareTripleChecker+Invalid, 1655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:07,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 2662 Invalid, 1655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:33:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-12-28 02:33:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1576. [2021-12-28 02:33:07,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1289 states have (on average 1.377812257564003) internal successors, (1776), 1312 states have internal predecessors, (1776), 149 states have call successors, (149), 111 states have call predecessors, (149), 136 states have return successors, (193), 155 states have call predecessors, (193), 147 states have call successors, (193) [2021-12-28 02:33:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2118 transitions. [2021-12-28 02:33:07,202 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2118 transitions. Word has length 65 [2021-12-28 02:33:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:07,203 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 2118 transitions. [2021-12-28 02:33:07,203 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) [2021-12-28 02:33:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2118 transitions. [2021-12-28 02:33:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:07,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:07,204 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] [2021-12-28 02:33:07,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:33:07,204 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:07,205 INFO L85 PathProgramCache]: Analyzing trace with hash 80225408, now seen corresponding path program 1 times [2021-12-28 02:33:07,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:07,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771129216] [2021-12-28 02:33:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:07,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:07,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:07,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771129216] [2021-12-28 02:33:07,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771129216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:07,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:07,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:07,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672195635] [2021-12-28 02:33:07,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:07,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:07,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:07,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:07,308 INFO L87 Difference]: Start difference. First operand 1576 states and 2118 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) [2021-12-28 02:33:07,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:07,924 INFO L93 Difference]: Finished difference Result 4012 states and 5222 transitions. [2021-12-28 02:33:07,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:33:07,925 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 [2021-12-28 02:33:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:07,934 INFO L225 Difference]: With dead ends: 4012 [2021-12-28 02:33:07,942 INFO L226 Difference]: Without dead ends: 2798 [2021-12-28 02:33:07,946 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 [2021-12-28 02:33:07,947 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 1994 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2025 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:07,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2025 Valid, 1319 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:33:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-12-28 02:33:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2690. [2021-12-28 02:33:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2144 states have (on average 1.3129664179104477) internal successors, (2815), 2189 states have internal predecessors, (2815), 274 states have call successors, (274), 215 states have call predecessors, (274), 270 states have return successors, (401), 290 states have call predecessors, (401), 272 states have call successors, (401) [2021-12-28 02:33:08,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 3490 transitions. [2021-12-28 02:33:08,155 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 3490 transitions. Word has length 65 [2021-12-28 02:33:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:08,155 INFO L470 AbstractCegarLoop]: Abstraction has 2690 states and 3490 transitions. [2021-12-28 02:33:08,155 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) [2021-12-28 02:33:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 3490 transitions. [2021-12-28 02:33:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:33:08,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:08,156 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] [2021-12-28 02:33:08,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:33:08,156 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:08,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1125374181, now seen corresponding path program 1 times [2021-12-28 02:33:08,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:08,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533795113] [2021-12-28 02:33:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:08,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:08,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:08,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:08,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533795113] [2021-12-28 02:33:08,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533795113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:08,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:08,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:08,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108716625] [2021-12-28 02:33:08,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:08,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:08,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:08,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:08,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:08,233 INFO L87 Difference]: Start difference. First operand 2690 states and 3490 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) [2021-12-28 02:33:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:08,867 INFO L93 Difference]: Finished difference Result 6082 states and 7754 transitions. [2021-12-28 02:33:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:08,868 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 [2021-12-28 02:33:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:08,879 INFO L225 Difference]: With dead ends: 6082 [2021-12-28 02:33:08,879 INFO L226 Difference]: Without dead ends: 3759 [2021-12-28 02:33:08,883 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 [2021-12-28 02:33:08,883 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 1124 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:08,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1133 Valid, 1609 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:33:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-12-28 02:33:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3503. [2021-12-28 02:33:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 2773 states have (on average 1.294626758023801) internal successors, (3590), 2825 states have internal predecessors, (3590), 364 states have call successors, (364), 293 states have call predecessors, (364), 364 states have return successors, (515), 389 states have call predecessors, (515), 362 states have call successors, (515) [2021-12-28 02:33:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 4469 transitions. [2021-12-28 02:33:08,997 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 4469 transitions. Word has length 66 [2021-12-28 02:33:08,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:08,997 INFO L470 AbstractCegarLoop]: Abstraction has 3503 states and 4469 transitions. [2021-12-28 02:33:08,997 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) [2021-12-28 02:33:08,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 4469 transitions. [2021-12-28 02:33:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 02:33:09,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:09,002 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] [2021-12-28 02:33:09,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:33:09,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:09,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:09,003 INFO L85 PathProgramCache]: Analyzing trace with hash 242787514, now seen corresponding path program 1 times [2021-12-28 02:33:09,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:09,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421743051] [2021-12-28 02:33:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:09,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:09,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:09,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:09,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421743051] [2021-12-28 02:33:09,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421743051] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:09,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:09,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:09,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073665574] [2021-12-28 02:33:09,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:09,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:09,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:09,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:09,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:09,091 INFO L87 Difference]: Start difference. First operand 3503 states and 4469 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) [2021-12-28 02:33:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:09,491 INFO L93 Difference]: Finished difference Result 7452 states and 9371 transitions. [2021-12-28 02:33:09,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:09,492 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 [2021-12-28 02:33:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:09,509 INFO L225 Difference]: With dead ends: 7452 [2021-12-28 02:33:09,509 INFO L226 Difference]: Without dead ends: 4314 [2021-12-28 02:33:09,514 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 [2021-12-28 02:33:09,515 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 1293 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:09,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1326 Valid, 1688 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4314 states. [2021-12-28 02:33:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4314 to 4066. [2021-12-28 02:33:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 3220 states have (on average 1.2847826086956522) internal successors, (4137), 3278 states have internal predecessors, (4137), 420 states have call successors, (420), 343 states have call predecessors, (420), 424 states have return successors, (592), 449 states have call predecessors, (592), 418 states have call successors, (592) [2021-12-28 02:33:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 5149 transitions. [2021-12-28 02:33:09,647 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 5149 transitions. Word has length 72 [2021-12-28 02:33:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:09,648 INFO L470 AbstractCegarLoop]: Abstraction has 4066 states and 5149 transitions. [2021-12-28 02:33:09,648 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) [2021-12-28 02:33:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 5149 transitions. [2021-12-28 02:33:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 02:33:09,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:09,649 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] [2021-12-28 02:33:09,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:33:09,650 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:09,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1580378082, now seen corresponding path program 1 times [2021-12-28 02:33:09,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:09,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032106547] [2021-12-28 02:33:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:09,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:09,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032106547] [2021-12-28 02:33:09,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032106547] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:09,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:09,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:09,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595634155] [2021-12-28 02:33:09,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:09,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:09,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:09,726 INFO L87 Difference]: Start difference. First operand 4066 states and 5149 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) [2021-12-28 02:33:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:10,197 INFO L93 Difference]: Finished difference Result 5115 states and 6409 transitions. [2021-12-28 02:33:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:33:10,198 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 [2021-12-28 02:33:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:10,214 INFO L225 Difference]: With dead ends: 5115 [2021-12-28 02:33:10,214 INFO L226 Difference]: Without dead ends: 5112 [2021-12-28 02:33:10,217 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 [2021-12-28 02:33:10,219 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 1948 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:10,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1958 Valid, 1664 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2021-12-28 02:33:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 4803. [2021-12-28 02:33:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 3782 states have (on average 1.273664727657324) internal successors, (4817), 3847 states have internal predecessors, (4817), 501 states have call successors, (501), 413 states have call predecessors, (501), 518 states have return successors, (716), 547 states have call predecessors, (716), 500 states have call successors, (716) [2021-12-28 02:33:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 6034 transitions. [2021-12-28 02:33:10,416 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 6034 transitions. Word has length 73 [2021-12-28 02:33:10,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:10,417 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 6034 transitions. [2021-12-28 02:33:10,417 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) [2021-12-28 02:33:10,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 6034 transitions. [2021-12-28 02:33:10,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 02:33:10,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:10,419 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] [2021-12-28 02:33:10,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:33:10,419 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:10,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:10,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1748440700, now seen corresponding path program 1 times [2021-12-28 02:33:10,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:10,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43325441] [2021-12-28 02:33:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:10,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:10,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:10,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:10,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43325441] [2021-12-28 02:33:10,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43325441] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:10,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741816260] [2021-12-28 02:33:10,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:10,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:10,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:10,521 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) [2021-12-28 02:33:10,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:33:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 02:33:10,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:11,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:33:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:11,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741816260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:33:11,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:33:11,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-28 02:33:11,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155995939] [2021-12-28 02:33:11,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:33:11,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:33:11,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:33:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:11,221 INFO L87 Difference]: Start difference. First operand 4803 states and 6034 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) [2021-12-28 02:33:12,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:12,679 INFO L93 Difference]: Finished difference Result 9217 states and 11407 transitions. [2021-12-28 02:33:12,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-28 02:33:12,679 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 [2021-12-28 02:33:12,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:12,721 INFO L225 Difference]: With dead ends: 9217 [2021-12-28 02:33:12,721 INFO L226 Difference]: Without dead ends: 9214 [2021-12-28 02:33:12,728 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 [2021-12-28 02:33:12,728 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 2800 mSDsluCounter, 1486 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2865 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:12,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2865 Valid, 2326 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:33:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2021-12-28 02:33:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 8328. [2021-12-28 02:33:13,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8328 states, 6537 states have (on average 1.259140278415175) internal successors, (8231), 6653 states have internal predecessors, (8231), 869 states have call successors, (869), 735 states have call predecessors, (869), 920 states have return successors, (1253), 944 states have call predecessors, (1253), 868 states have call successors, (1253) [2021-12-28 02:33:13,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8328 states to 8328 states and 10353 transitions. [2021-12-28 02:33:13,161 INFO L78 Accepts]: Start accepts. Automaton has 8328 states and 10353 transitions. Word has length 74 [2021-12-28 02:33:13,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:13,161 INFO L470 AbstractCegarLoop]: Abstraction has 8328 states and 10353 transitions. [2021-12-28 02:33:13,162 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) [2021-12-28 02:33:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand 8328 states and 10353 transitions. [2021-12-28 02:33:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 02:33:13,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:13,167 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] [2021-12-28 02:33:13,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 02:33:13,391 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,SelfDestructingSolverStorable9 [2021-12-28 02:33:13,391 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:13,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:13,392 INFO L85 PathProgramCache]: Analyzing trace with hash 17284126, now seen corresponding path program 2 times [2021-12-28 02:33:13,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:13,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111906389] [2021-12-28 02:33:13,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:13,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:13,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111906389] [2021-12-28 02:33:13,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111906389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:13,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:13,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:13,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531917664] [2021-12-28 02:33:13,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:13,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:13,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:13,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:13,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:13,473 INFO L87 Difference]: Start difference. First operand 8328 states and 10353 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) [2021-12-28 02:33:13,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:13,952 INFO L93 Difference]: Finished difference Result 11318 states and 14054 transitions. [2021-12-28 02:33:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:33:13,953 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 [2021-12-28 02:33:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:14,023 INFO L225 Difference]: With dead ends: 11318 [2021-12-28 02:33:14,024 INFO L226 Difference]: Without dead ends: 4700 [2021-12-28 02:33:14,032 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 [2021-12-28 02:33:14,033 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 1226 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:14,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 1749 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:14,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4700 states. [2021-12-28 02:33:14,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4700 to 3651. [2021-12-28 02:33:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 2896 states have (on average 1.2613950276243093) internal successors, (3653), 2934 states have internal predecessors, (3653), 384 states have call successors, (384), 315 states have call predecessors, (384), 369 states have return successors, (509), 406 states have call predecessors, (509), 383 states have call successors, (509) [2021-12-28 02:33:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 4546 transitions. [2021-12-28 02:33:14,161 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 4546 transitions. Word has length 77 [2021-12-28 02:33:14,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:14,161 INFO L470 AbstractCegarLoop]: Abstraction has 3651 states and 4546 transitions. [2021-12-28 02:33:14,161 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) [2021-12-28 02:33:14,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 4546 transitions. [2021-12-28 02:33:14,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 02:33:14,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:14,163 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] [2021-12-28 02:33:14,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:33:14,163 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:14,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:14,164 INFO L85 PathProgramCache]: Analyzing trace with hash 621442966, now seen corresponding path program 1 times [2021-12-28 02:33:14,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:14,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151199013] [2021-12-28 02:33:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:14,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 02:33:14,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151199013] [2021-12-28 02:33:14,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151199013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:14,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:14,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:14,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976087535] [2021-12-28 02:33:14,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:14,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:14,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:14,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:14,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:14,238 INFO L87 Difference]: Start difference. First operand 3651 states and 4546 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) [2021-12-28 02:33:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:15,290 INFO L93 Difference]: Finished difference Result 10215 states and 12513 transitions. [2021-12-28 02:33:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 02:33:15,290 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 [2021-12-28 02:33:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:15,309 INFO L225 Difference]: With dead ends: 10215 [2021-12-28 02:33:15,309 INFO L226 Difference]: Without dead ends: 5863 [2021-12-28 02:33:15,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-28 02:33:15,319 INFO L933 BasicCegarLoop]: 724 mSDtfsCounter, 1067 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 2390 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:15,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1080 Valid, 2390 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:33:15,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5863 states. [2021-12-28 02:33:15,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5863 to 5599. [2021-12-28 02:33:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 4375 states have (on average 1.226057142857143) internal successors, (5364), 4456 states have internal predecessors, (5364), 598 states have call successors, (598), 499 states have call predecessors, (598), 624 states have return successors, (889), 648 states have call predecessors, (889), 597 states have call successors, (889) [2021-12-28 02:33:15,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 6851 transitions. [2021-12-28 02:33:15,571 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 6851 transitions. Word has length 84 [2021-12-28 02:33:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:15,571 INFO L470 AbstractCegarLoop]: Abstraction has 5599 states and 6851 transitions. [2021-12-28 02:33:15,572 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) [2021-12-28 02:33:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 6851 transitions. [2021-12-28 02:33:15,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 02:33:15,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:15,574 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] [2021-12-28 02:33:15,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:33:15,574 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:15,575 INFO L85 PathProgramCache]: Analyzing trace with hash 770149948, now seen corresponding path program 1 times [2021-12-28 02:33:15,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:15,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225116357] [2021-12-28 02:33:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:15,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:33:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 02:33:15,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:15,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225116357] [2021-12-28 02:33:15,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225116357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:15,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:15,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:15,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809861477] [2021-12-28 02:33:15,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:15,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:15,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:15,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:15,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:15,643 INFO L87 Difference]: Start difference. First operand 5599 states and 6851 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) [2021-12-28 02:33:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:16,725 INFO L93 Difference]: Finished difference Result 9226 states and 11185 transitions. [2021-12-28 02:33:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 02:33:16,725 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 [2021-12-28 02:33:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:16,742 INFO L225 Difference]: With dead ends: 9226 [2021-12-28 02:33:16,744 INFO L226 Difference]: Without dead ends: 4717 [2021-12-28 02:33:16,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-28 02:33:16,753 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 2268 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2308 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:16,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2308 Valid, 2062 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:33:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4717 states. [2021-12-28 02:33:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4717 to 4286. [2021-12-28 02:33:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 3344 states have (on average 1.2135167464114833) internal successors, (4058), 3408 states have internal predecessors, (4058), 457 states have call successors, (457), 376 states have call predecessors, (457), 483 states have return successors, (635), 506 states have call predecessors, (635), 456 states have call successors, (635) [2021-12-28 02:33:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 5150 transitions. [2021-12-28 02:33:16,934 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 5150 transitions. Word has length 93 [2021-12-28 02:33:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:16,935 INFO L470 AbstractCegarLoop]: Abstraction has 4286 states and 5150 transitions. [2021-12-28 02:33:16,935 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) [2021-12-28 02:33:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 5150 transitions. [2021-12-28 02:33:16,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-28 02:33:16,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:16,939 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:16,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:33:16,939 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:16,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1691833410, now seen corresponding path program 1 times [2021-12-28 02:33:16,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:16,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866536060] [2021-12-28 02:33:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:16,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:33:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:33:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 02:33:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:33:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 02:33:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-28 02:33:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-28 02:33:17,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:17,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866536060] [2021-12-28 02:33:17,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866536060] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:17,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284619253] [2021-12-28 02:33:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:17,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:17,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:17,046 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:33:17,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:33:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 02:33:17,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 02:33:17,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:33:17,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284619253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:17,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:33:17,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-28 02:33:17,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846395673] [2021-12-28 02:33:17,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:17,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:17,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:33:17,387 INFO L87 Difference]: Start difference. First operand 4286 states and 5150 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 02:33:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:17,481 INFO L93 Difference]: Finished difference Result 6450 states and 7738 transitions. [2021-12-28 02:33:17,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-28 02:33:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:17,487 INFO L225 Difference]: With dead ends: 6450 [2021-12-28 02:33:17,488 INFO L226 Difference]: Without dead ends: 2531 [2021-12-28 02:33:17,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-28 02:33:17,494 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 34 mSDsluCounter, 2695 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3378 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:17,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3378 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:33:17,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-12-28 02:33:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2375. [2021-12-28 02:33:17,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 1941 states have (on average 1.237506439979392) internal successors, (2402), 1961 states have internal predecessors, (2402), 216 states have call successors, (216), 163 states have call predecessors, (216), 216 states have return successors, (301), 251 states have call predecessors, (301), 215 states have call successors, (301) [2021-12-28 02:33:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 2919 transitions. [2021-12-28 02:33:17,575 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 2919 transitions. Word has length 145 [2021-12-28 02:33:17,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:17,575 INFO L470 AbstractCegarLoop]: Abstraction has 2375 states and 2919 transitions. [2021-12-28 02:33:17,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 02:33:17,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 2919 transitions. [2021-12-28 02:33:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-28 02:33:17,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:17,578 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:17,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:33:17,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 02:33:17,791 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1863034906, now seen corresponding path program 1 times [2021-12-28 02:33:17,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:17,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655903793] [2021-12-28 02:33:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:17,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 02:33:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 02:33:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:33:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-28 02:33:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-28 02:33:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 02:33:17,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-28 02:33:17,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:17,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655903793] [2021-12-28 02:33:17,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655903793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:17,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:17,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:17,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785438090] [2021-12-28 02:33:17,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:17,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:17,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:17,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:17,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:17,859 INFO L87 Difference]: Start difference. First operand 2375 states and 2919 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 02:33:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:18,341 INFO L93 Difference]: Finished difference Result 2425 states and 2971 transitions. [2021-12-28 02:33:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:18,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-28 02:33:18,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:18,346 INFO L225 Difference]: With dead ends: 2425 [2021-12-28 02:33:18,346 INFO L226 Difference]: Without dead ends: 1932 [2021-12-28 02:33:18,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:18,348 INFO L933 BasicCegarLoop]: 661 mSDtfsCounter, 1005 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:18,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 1543 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:33:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-12-28 02:33:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1885. [2021-12-28 02:33:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1562 states have (on average 1.2605633802816902) internal successors, (1969), 1577 states have internal predecessors, (1969), 163 states have call successors, (163), 118 states have call predecessors, (163), 158 states have return successors, (225), 190 states have call predecessors, (225), 162 states have call successors, (225) [2021-12-28 02:33:18,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2357 transitions. [2021-12-28 02:33:18,433 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2357 transitions. Word has length 147 [2021-12-28 02:33:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:18,433 INFO L470 AbstractCegarLoop]: Abstraction has 1885 states and 2357 transitions. [2021-12-28 02:33:18,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 02:33:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2357 transitions. [2021-12-28 02:33:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-28 02:33:18,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:18,437 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:18,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:33:18,437 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:18,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash 604042568, now seen corresponding path program 1 times [2021-12-28 02:33:18,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:18,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849026307] [2021-12-28 02:33:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:18,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:33:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:33:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 02:33:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:33:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-28 02:33:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 02:33:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 02:33:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-28 02:33:18,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:18,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849026307] [2021-12-28 02:33:18,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849026307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:18,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:18,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:18,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795930812] [2021-12-28 02:33:18,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:18,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:18,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:18,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:18,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:18,530 INFO L87 Difference]: Start difference. First operand 1885 states and 2357 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 02:33:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:19,142 INFO L93 Difference]: Finished difference Result 3166 states and 3875 transitions. [2021-12-28 02:33:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:33:19,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-28 02:33:19,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:19,148 INFO L225 Difference]: With dead ends: 3166 [2021-12-28 02:33:19,149 INFO L226 Difference]: Without dead ends: 1784 [2021-12-28 02:33:19,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:19,153 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 640 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 2327 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:19,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 2327 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:33:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-12-28 02:33:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1638. [2021-12-28 02:33:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1366 states have (on average 1.2767203513909224) internal successors, (1744), 1379 states have internal predecessors, (1744), 139 states have call successors, (139), 98 states have call predecessors, (139), 131 states have return successors, (186), 161 states have call predecessors, (186), 138 states have call successors, (186) [2021-12-28 02:33:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2069 transitions. [2021-12-28 02:33:19,229 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2069 transitions. Word has length 159 [2021-12-28 02:33:19,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:19,230 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 2069 transitions. [2021-12-28 02:33:19,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 02:33:19,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2069 transitions. [2021-12-28 02:33:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-28 02:33:19,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:19,233 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:19,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:33:19,234 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:19,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1591452551, now seen corresponding path program 1 times [2021-12-28 02:33:19,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:19,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852176460] [2021-12-28 02:33:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:19,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:33:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:33:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 02:33:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 02:33:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 02:33:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 02:33:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-28 02:33:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 02:33:19,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:19,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852176460] [2021-12-28 02:33:19,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852176460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:19,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363055540] [2021-12-28 02:33:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:19,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:19,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:19,355 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:33:19,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:33:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 02:33:19,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-28 02:33:19,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:33:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-28 02:33:20,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363055540] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:33:20,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:33:20,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-28 02:33:20,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101008053] [2021-12-28 02:33:20,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:33:20,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 02:33:20,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 02:33:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-28 02:33:20,128 INFO L87 Difference]: Start difference. First operand 1638 states and 2069 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-28 02:33:21,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:21,211 INFO L93 Difference]: Finished difference Result 3432 states and 4271 transitions. [2021-12-28 02:33:21,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 02:33:21,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2021-12-28 02:33:21,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:21,217 INFO L225 Difference]: With dead ends: 3432 [2021-12-28 02:33:21,217 INFO L226 Difference]: Without dead ends: 2029 [2021-12-28 02:33:21,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 355 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-12-28 02:33:21,221 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 2424 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 2413 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:21,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2455 Valid, 2413 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:33:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-12-28 02:33:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1916. [2021-12-28 02:33:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1569 states have (on average 1.2402804333970683) internal successors, (1946), 1583 states have internal predecessors, (1946), 179 states have call successors, (179), 136 states have call predecessors, (179), 166 states have return successors, (255), 197 states have call predecessors, (255), 178 states have call successors, (255) [2021-12-28 02:33:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2380 transitions. [2021-12-28 02:33:21,311 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2380 transitions. Word has length 162 [2021-12-28 02:33:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:21,311 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2380 transitions. [2021-12-28 02:33:21,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-28 02:33:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2380 transitions. [2021-12-28 02:33:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:21,313 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:21,313 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:21,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:33:21,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:21,542 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:21,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1328549862, now seen corresponding path program 1 times [2021-12-28 02:33:21,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:21,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609809735] [2021-12-28 02:33:21,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:21,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:21,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:21,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609809735] [2021-12-28 02:33:21,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609809735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:21,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:21,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:33:21,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880500235] [2021-12-28 02:33:21,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:21,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:33:21,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:21,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:33:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:33:21,650 INFO L87 Difference]: Start difference. First operand 1916 states and 2380 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-12-28 02:33:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:22,845 INFO L93 Difference]: Finished difference Result 2392 states and 3150 transitions. [2021-12-28 02:33:22,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:22,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:22,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:22,851 INFO L225 Difference]: With dead ends: 2392 [2021-12-28 02:33:22,851 INFO L226 Difference]: Without dead ends: 2047 [2021-12-28 02:33:22,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:22,853 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 1056 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:22,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1079 Valid, 1266 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:22,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2021-12-28 02:33:22,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 1916. [2021-12-28 02:33:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1569 states have (on average 1.2396430847673678) internal successors, (1945), 1583 states have internal predecessors, (1945), 179 states have call successors, (179), 136 states have call predecessors, (179), 166 states have return successors, (255), 197 states have call predecessors, (255), 178 states have call successors, (255) [2021-12-28 02:33:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2379 transitions. [2021-12-28 02:33:22,986 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2379 transitions. Word has length 167 [2021-12-28 02:33:22,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:22,986 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2379 transitions. [2021-12-28 02:33:22,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-12-28 02:33:22,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2379 transitions. [2021-12-28 02:33:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:22,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:22,988 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:22,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:33:22,989 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:22,989 INFO L85 PathProgramCache]: Analyzing trace with hash -771188568, now seen corresponding path program 1 times [2021-12-28 02:33:22,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:22,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312314709] [2021-12-28 02:33:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:22,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:23,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:23,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312314709] [2021-12-28 02:33:23,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312314709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:23,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:23,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:33:23,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079532221] [2021-12-28 02:33:23,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:23,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:33:23,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:23,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:33:23,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:33:23,083 INFO L87 Difference]: Start difference. First operand 1916 states and 2379 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-12-28 02:33:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:24,202 INFO L93 Difference]: Finished difference Result 2384 states and 3133 transitions. [2021-12-28 02:33:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:24,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:24,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:24,206 INFO L225 Difference]: With dead ends: 2384 [2021-12-28 02:33:24,207 INFO L226 Difference]: Without dead ends: 2047 [2021-12-28 02:33:24,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:24,208 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 1047 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:24,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1070 Valid, 1264 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:33:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2021-12-28 02:33:24,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 1916. [2021-12-28 02:33:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1569 states have (on average 1.2390057361376674) internal successors, (1944), 1583 states have internal predecessors, (1944), 179 states have call successors, (179), 136 states have call predecessors, (179), 166 states have return successors, (255), 197 states have call predecessors, (255), 178 states have call successors, (255) [2021-12-28 02:33:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2378 transitions. [2021-12-28 02:33:24,309 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2378 transitions. Word has length 167 [2021-12-28 02:33:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:24,310 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2378 transitions. [2021-12-28 02:33:24,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-12-28 02:33:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2378 transitions. [2021-12-28 02:33:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:24,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:24,312 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:24,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:33:24,312 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:24,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:24,312 INFO L85 PathProgramCache]: Analyzing trace with hash 151978858, now seen corresponding path program 1 times [2021-12-28 02:33:24,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:24,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048760446] [2021-12-28 02:33:24,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:24,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:24,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:24,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048760446] [2021-12-28 02:33:24,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048760446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:24,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:24,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:24,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350705990] [2021-12-28 02:33:24,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:24,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:24,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:24,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:24,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:24,428 INFO L87 Difference]: Start difference. First operand 1916 states and 2378 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 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) [2021-12-28 02:33:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:26,581 INFO L93 Difference]: Finished difference Result 2860 states and 3905 transitions. [2021-12-28 02:33:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:26,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:26,587 INFO L225 Difference]: With dead ends: 2860 [2021-12-28 02:33:26,587 INFO L226 Difference]: Without dead ends: 2527 [2021-12-28 02:33:26,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:26,590 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 1652 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:26,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1680 Valid, 1808 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-28 02:33:26,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-12-28 02:33:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2266. [2021-12-28 02:33:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 1892 states have (on average 1.2996828752642706) internal successors, (2459), 1907 states have internal predecessors, (2459), 199 states have call successors, (199), 142 states have call predecessors, (199), 173 states have return successors, (278), 217 states have call predecessors, (278), 198 states have call successors, (278) [2021-12-28 02:33:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 2936 transitions. [2021-12-28 02:33:26,706 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 2936 transitions. Word has length 167 [2021-12-28 02:33:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:26,706 INFO L470 AbstractCegarLoop]: Abstraction has 2266 states and 2936 transitions. [2021-12-28 02:33:26,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 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) [2021-12-28 02:33:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 2936 transitions. [2021-12-28 02:33:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:26,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:26,708 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:26,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:33:26,709 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:26,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1151565038, now seen corresponding path program 1 times [2021-12-28 02:33:26,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:26,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041498058] [2021-12-28 02:33:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:26,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:26,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:26,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041498058] [2021-12-28 02:33:26,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041498058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:26,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:26,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:26,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511708946] [2021-12-28 02:33:26,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:26,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:26,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:26,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:26,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:26,847 INFO L87 Difference]: Start difference. First operand 2266 states and 2936 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:29,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:29,665 INFO L93 Difference]: Finished difference Result 3708 states and 5270 transitions. [2021-12-28 02:33:29,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:29,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:29,672 INFO L225 Difference]: With dead ends: 3708 [2021-12-28 02:33:29,672 INFO L226 Difference]: Without dead ends: 3025 [2021-12-28 02:33:29,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:33:29,674 INFO L933 BasicCegarLoop]: 1050 mSDtfsCounter, 1682 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 3083 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 2999 SdHoareTripleChecker+Invalid, 3195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 3083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:29,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1710 Valid, 2999 Invalid, 3195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 3083 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-28 02:33:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-12-28 02:33:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2591. [2021-12-28 02:33:29,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2190 states have (on average 1.3351598173515982) internal successors, (2924), 2206 states have internal predecessors, (2924), 219 states have call successors, (219), 148 states have call predecessors, (219), 180 states have return successors, (300), 238 states have call predecessors, (300), 218 states have call successors, (300) [2021-12-28 02:33:29,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 3443 transitions. [2021-12-28 02:33:29,835 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 3443 transitions. Word has length 167 [2021-12-28 02:33:29,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:29,835 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 3443 transitions. [2021-12-28 02:33:29,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:29,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 3443 transitions. [2021-12-28 02:33:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:29,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:29,837 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:29,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 02:33:29,838 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1489852588, now seen corresponding path program 1 times [2021-12-28 02:33:29,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:29,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908635011] [2021-12-28 02:33:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:29,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:29,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:29,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908635011] [2021-12-28 02:33:29,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908635011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:29,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:29,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:29,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886836655] [2021-12-28 02:33:29,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:29,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:29,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:29,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:29,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:29,947 INFO L87 Difference]: Start difference. First operand 2591 states and 3443 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:31,485 INFO L93 Difference]: Finished difference Result 4049 states and 5815 transitions. [2021-12-28 02:33:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:31,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:31,492 INFO L225 Difference]: With dead ends: 4049 [2021-12-28 02:33:31,492 INFO L226 Difference]: Without dead ends: 3041 [2021-12-28 02:33:31,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:31,495 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1251 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:31,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 1783 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:33:31,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-12-28 02:33:31,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2591. [2021-12-28 02:33:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2190 states have (on average 1.3337899543378995) internal successors, (2921), 2206 states have internal predecessors, (2921), 219 states have call successors, (219), 148 states have call predecessors, (219), 180 states have return successors, (300), 238 states have call predecessors, (300), 218 states have call successors, (300) [2021-12-28 02:33:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 3440 transitions. [2021-12-28 02:33:31,687 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 3440 transitions. Word has length 167 [2021-12-28 02:33:31,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:31,687 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 3440 transitions. [2021-12-28 02:33:31,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 3440 transitions. [2021-12-28 02:33:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:31,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:31,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:31,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 02:33:31,691 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:31,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:31,692 INFO L85 PathProgramCache]: Analyzing trace with hash 949423082, now seen corresponding path program 1 times [2021-12-28 02:33:31,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:31,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459159642] [2021-12-28 02:33:31,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:31,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:31,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:31,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:31,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459159642] [2021-12-28 02:33:31,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459159642] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:31,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:31,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:31,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809309762] [2021-12-28 02:33:31,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:31,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:31,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:31,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:31,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:31,814 INFO L87 Difference]: Start difference. First operand 2591 states and 3440 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:33,302 INFO L93 Difference]: Finished difference Result 4045 states and 5798 transitions. [2021-12-28 02:33:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:33,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:33,308 INFO L225 Difference]: With dead ends: 4045 [2021-12-28 02:33:33,308 INFO L226 Difference]: Without dead ends: 3037 [2021-12-28 02:33:33,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:33,311 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 1327 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:33,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 1739 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:33:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-12-28 02:33:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2591. [2021-12-28 02:33:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2190 states have (on average 1.3324200913242008) internal successors, (2918), 2206 states have internal predecessors, (2918), 219 states have call successors, (219), 148 states have call predecessors, (219), 180 states have return successors, (300), 238 states have call predecessors, (300), 218 states have call successors, (300) [2021-12-28 02:33:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 3437 transitions. [2021-12-28 02:33:33,454 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 3437 transitions. Word has length 167 [2021-12-28 02:33:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:33,455 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 3437 transitions. [2021-12-28 02:33:33,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 3437 transitions. [2021-12-28 02:33:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:33,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:33,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:33,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 02:33:33,457 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:33,458 INFO L85 PathProgramCache]: Analyzing trace with hash 793442540, now seen corresponding path program 1 times [2021-12-28 02:33:33,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:33,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205124780] [2021-12-28 02:33:33,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:33,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:33,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:33,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205124780] [2021-12-28 02:33:33,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205124780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:33,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:33,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:33,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248714086] [2021-12-28 02:33:33,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:33,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:33,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:33,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:33,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:33,582 INFO L87 Difference]: Start difference. First operand 2591 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:36,428 INFO L93 Difference]: Finished difference Result 4949 states and 7221 transitions. [2021-12-28 02:33:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:36,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:36,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:36,439 INFO L225 Difference]: With dead ends: 4949 [2021-12-28 02:33:36,439 INFO L226 Difference]: Without dead ends: 3941 [2021-12-28 02:33:36,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:33:36,444 INFO L933 BasicCegarLoop]: 1026 mSDtfsCounter, 1662 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 3034 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 2975 SdHoareTripleChecker+Invalid, 3148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:36,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1690 Valid, 2975 Invalid, 3148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3034 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-28 02:33:36,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3941 states. [2021-12-28 02:33:36,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3941 to 3251. [2021-12-28 02:33:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2796 states have (on average 1.3801859799713876) internal successors, (3859), 2814 states have internal predecessors, (3859), 259 states have call successors, (259), 160 states have call predecessors, (259), 194 states have return successors, (348), 280 states have call predecessors, (348), 258 states have call successors, (348) [2021-12-28 02:33:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4466 transitions. [2021-12-28 02:33:36,687 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4466 transitions. Word has length 167 [2021-12-28 02:33:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:36,687 INFO L470 AbstractCegarLoop]: Abstraction has 3251 states and 4466 transitions. [2021-12-28 02:33:36,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4466 transitions. [2021-12-28 02:33:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:36,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:36,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:36,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 02:33:36,690 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1204052906, now seen corresponding path program 1 times [2021-12-28 02:33:36,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:36,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054240948] [2021-12-28 02:33:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:36,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:36,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:36,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054240948] [2021-12-28 02:33:36,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054240948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:36,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:36,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:36,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653188074] [2021-12-28 02:33:36,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:36,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:36,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:36,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:36,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:36,798 INFO L87 Difference]: Start difference. First operand 3251 states and 4466 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:38,154 INFO L93 Difference]: Finished difference Result 5597 states and 8239 transitions. [2021-12-28 02:33:38,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:38,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:38,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:38,168 INFO L225 Difference]: With dead ends: 5597 [2021-12-28 02:33:38,168 INFO L226 Difference]: Without dead ends: 3929 [2021-12-28 02:33:38,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:38,174 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 1453 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 1473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:38,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1482 Valid, 1540 Invalid, 1473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:33:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2021-12-28 02:33:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3251. [2021-12-28 02:33:38,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2796 states have (on average 1.3783977110157368) internal successors, (3854), 2814 states have internal predecessors, (3854), 259 states have call successors, (259), 160 states have call predecessors, (259), 194 states have return successors, (348), 280 states have call predecessors, (348), 258 states have call successors, (348) [2021-12-28 02:33:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4461 transitions. [2021-12-28 02:33:38,413 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4461 transitions. Word has length 167 [2021-12-28 02:33:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:38,413 INFO L470 AbstractCegarLoop]: Abstraction has 3251 states and 4461 transitions. [2021-12-28 02:33:38,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4461 transitions. [2021-12-28 02:33:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:38,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:38,415 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:38,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-28 02:33:38,416 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:38,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:38,416 INFO L85 PathProgramCache]: Analyzing trace with hash -583816916, now seen corresponding path program 1 times [2021-12-28 02:33:38,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:38,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207157170] [2021-12-28 02:33:38,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:38,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:38,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:38,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207157170] [2021-12-28 02:33:38,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207157170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:38,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:38,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:38,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235203104] [2021-12-28 02:33:38,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:38,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:38,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:38,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:38,513 INFO L87 Difference]: Start difference. First operand 3251 states and 4461 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:41,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:41,582 INFO L93 Difference]: Finished difference Result 7353 states and 10986 transitions. [2021-12-28 02:33:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:41,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:41,595 INFO L225 Difference]: With dead ends: 7353 [2021-12-28 02:33:41,595 INFO L226 Difference]: Without dead ends: 5685 [2021-12-28 02:33:41,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:33:41,599 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 1654 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 3007 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 2964 SdHoareTripleChecker+Invalid, 3121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:41,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 2964 Invalid, 3121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3007 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-28 02:33:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2021-12-28 02:33:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 4573. [2021-12-28 02:33:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 4010 states have (on average 1.428927680798005) internal successors, (5730), 4032 states have internal predecessors, (5730), 339 states have call successors, (339), 184 states have call predecessors, (339), 222 states have return successors, (450), 364 states have call predecessors, (450), 338 states have call successors, (450) [2021-12-28 02:33:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 6519 transitions. [2021-12-28 02:33:41,887 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 6519 transitions. Word has length 167 [2021-12-28 02:33:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:41,887 INFO L470 AbstractCegarLoop]: Abstraction has 4573 states and 6519 transitions. [2021-12-28 02:33:41,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 6519 transitions. [2021-12-28 02:33:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:41,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:41,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:41,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-28 02:33:41,892 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:41,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1575267178, now seen corresponding path program 1 times [2021-12-28 02:33:41,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:41,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661552482] [2021-12-28 02:33:41,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:41,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:41,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:42,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:42,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661552482] [2021-12-28 02:33:42,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661552482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:42,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:42,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:42,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920910661] [2021-12-28 02:33:42,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:42,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:42,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:42,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:42,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:42,002 INFO L87 Difference]: Start difference. First operand 4573 states and 6519 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:43,551 INFO L93 Difference]: Finished difference Result 8693 states and 13106 transitions. [2021-12-28 02:33:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:43,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:43,565 INFO L225 Difference]: With dead ends: 8693 [2021-12-28 02:33:43,566 INFO L226 Difference]: Without dead ends: 5703 [2021-12-28 02:33:43,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:43,574 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 1452 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:43,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1533 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:33:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-12-28 02:33:43,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 4573. [2021-12-28 02:33:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 4010 states have (on average 1.4266832917705736) internal successors, (5721), 4032 states have internal predecessors, (5721), 339 states have call successors, (339), 184 states have call predecessors, (339), 222 states have return successors, (450), 364 states have call predecessors, (450), 338 states have call successors, (450) [2021-12-28 02:33:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 6510 transitions. [2021-12-28 02:33:43,875 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 6510 transitions. Word has length 167 [2021-12-28 02:33:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:43,875 INFO L470 AbstractCegarLoop]: Abstraction has 4573 states and 6510 transitions. [2021-12-28 02:33:43,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:43,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 6510 transitions. [2021-12-28 02:33:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:43,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:43,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:43,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-28 02:33:43,878 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:43,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1644915052, now seen corresponding path program 1 times [2021-12-28 02:33:43,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:43,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629542267] [2021-12-28 02:33:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:43,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:43,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:43,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629542267] [2021-12-28 02:33:43,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629542267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:43,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:43,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:43,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299971005] [2021-12-28 02:33:43,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:43,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:43,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:43,979 INFO L87 Difference]: Start difference. First operand 4573 states and 6510 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:47,135 INFO L93 Difference]: Finished difference Result 12159 states and 18510 transitions. [2021-12-28 02:33:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:47,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:47,154 INFO L225 Difference]: With dead ends: 12159 [2021-12-28 02:33:47,154 INFO L226 Difference]: Without dead ends: 9169 [2021-12-28 02:33:47,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:33:47,162 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 1649 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 2977 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 2951 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:47,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1677 Valid, 2951 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2977 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-28 02:33:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9169 states. [2021-12-28 02:33:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9169 to 7231. [2021-12-28 02:33:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7231 states, 6452 states have (on average 1.4694668319900805) internal successors, (9481), 6482 states have internal predecessors, (9481), 499 states have call successors, (499), 232 states have call predecessors, (499), 278 states have return successors, (672), 532 states have call predecessors, (672), 498 states have call successors, (672) [2021-12-28 02:33:47,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7231 states to 7231 states and 10652 transitions. [2021-12-28 02:33:47,678 INFO L78 Accepts]: Start accepts. Automaton has 7231 states and 10652 transitions. Word has length 167 [2021-12-28 02:33:47,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:47,679 INFO L470 AbstractCegarLoop]: Abstraction has 7231 states and 10652 transitions. [2021-12-28 02:33:47,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:47,679 INFO L276 IsEmpty]: Start isEmpty. Operand 7231 states and 10652 transitions. [2021-12-28 02:33:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:47,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:47,685 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:47,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-28 02:33:47,685 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:47,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:47,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2062803754, now seen corresponding path program 1 times [2021-12-28 02:33:47,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:47,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707457782] [2021-12-28 02:33:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:47,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:47,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:47,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707457782] [2021-12-28 02:33:47,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707457782] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:47,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:47,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:47,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435677666] [2021-12-28 02:33:47,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:47,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:47,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:47,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:47,806 INFO L87 Difference]: Start difference. First operand 7231 states and 10652 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:49,859 INFO L93 Difference]: Finished difference Result 14867 states and 22821 transitions. [2021-12-28 02:33:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:49,896 INFO L225 Difference]: With dead ends: 14867 [2021-12-28 02:33:49,896 INFO L226 Difference]: Without dead ends: 9219 [2021-12-28 02:33:49,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:49,915 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 1452 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:49,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1522 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:33:49,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-12-28 02:33:50,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 7231. [2021-12-28 02:33:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7231 states, 6452 states have (on average 1.466831990080595) internal successors, (9464), 6482 states have internal predecessors, (9464), 499 states have call successors, (499), 232 states have call predecessors, (499), 278 states have return successors, (672), 532 states have call predecessors, (672), 498 states have call successors, (672) [2021-12-28 02:33:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7231 states to 7231 states and 10635 transitions. [2021-12-28 02:33:50,541 INFO L78 Accepts]: Start accepts. Automaton has 7231 states and 10635 transitions. Word has length 167 [2021-12-28 02:33:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:50,541 INFO L470 AbstractCegarLoop]: Abstraction has 7231 states and 10635 transitions. [2021-12-28 02:33:50,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 7231 states and 10635 transitions. [2021-12-28 02:33:50,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:50,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:50,545 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:50,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-28 02:33:50,545 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:50,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:50,546 INFO L85 PathProgramCache]: Analyzing trace with hash 445363304, now seen corresponding path program 1 times [2021-12-28 02:33:50,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:50,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380534451] [2021-12-28 02:33:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:50,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:50,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:50,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:50,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:50,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:50,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:50,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:50,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:50,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380534451] [2021-12-28 02:33:50,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380534451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:50,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:50,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:50,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064444489] [2021-12-28 02:33:50,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:50,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:50,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:50,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:50,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:50,690 INFO L87 Difference]: Start difference. First operand 7231 states and 10635 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:52,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:52,696 INFO L93 Difference]: Finished difference Result 14849 states and 22734 transitions. [2021-12-28 02:33:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:52,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 167 [2021-12-28 02:33:52,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:52,757 INFO L225 Difference]: With dead ends: 14849 [2021-12-28 02:33:52,757 INFO L226 Difference]: Without dead ends: 9201 [2021-12-28 02:33:52,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:52,775 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 1289 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1318 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:52,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1318 Valid, 1724 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:52,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9201 states. [2021-12-28 02:33:53,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9201 to 7231. [2021-12-28 02:33:53,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7231 states, 6452 states have (on average 1.4641971481711098) internal successors, (9447), 6482 states have internal predecessors, (9447), 499 states have call successors, (499), 232 states have call predecessors, (499), 278 states have return successors, (672), 532 states have call predecessors, (672), 498 states have call successors, (672) [2021-12-28 02:33:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7231 states to 7231 states and 10618 transitions. [2021-12-28 02:33:53,476 INFO L78 Accepts]: Start accepts. Automaton has 7231 states and 10618 transitions. Word has length 167 [2021-12-28 02:33:53,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:53,476 INFO L470 AbstractCegarLoop]: Abstraction has 7231 states and 10618 transitions. [2021-12-28 02:33:53,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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) [2021-12-28 02:33:53,477 INFO L276 IsEmpty]: Start isEmpty. Operand 7231 states and 10618 transitions. [2021-12-28 02:33:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-28 02:33:53,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:53,495 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:53,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-28 02:33:53,496 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash 808829802, now seen corresponding path program 1 times [2021-12-28 02:33:53,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:53,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780351281] [2021-12-28 02:33:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:53,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:53,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:53,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:53,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:53,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:53,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:53,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:53,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:53,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780351281] [2021-12-28 02:33:53,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780351281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:53,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:53,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:53,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263396090] [2021-12-28 02:33:53,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:53,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:53,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:53,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:53,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:53,646 INFO L87 Difference]: Start difference. First operand 7231 states and 10618 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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)