./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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.08.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 dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:51:54,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:51:54,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:51:55,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:51:55,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:51:55,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:51:55,013 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:51:55,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:51:55,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:51:55,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:51:55,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:51:55,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:51:55,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:51:55,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:51:55,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:51:55,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:51:55,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:51:55,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:51:55,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:51:55,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:51:55,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:51:55,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:51:55,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:51:55,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:51:55,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:51:55,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:51:55,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:51:55,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:51:55,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:51:55,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:51:55,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:51:55,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:51:55,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:51:55,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:51:55,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:51:55,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:51:55,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:51:55,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:51:55,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:51:55,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:51:55,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:51:55,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:51:55,059 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:51:55,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:51:55,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:51:55,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:51:55,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:51:55,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:51:55,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:51:55,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:51:55,061 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:51:55,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:51:55,061 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:51:55,061 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:51:55,061 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:51:55,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:51:55,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:51:55,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:51:55,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:51:55,062 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:51:55,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:51:55,062 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:51:55,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:51:55,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:51:55,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:51:55,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:51:55,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:51:55,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:51:55,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:51:55,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:51:55,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:51:55,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:51:55,064 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:51:55,064 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:51:55,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:51:55,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:51:55,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b [2021-12-21 14:51:55,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:51:55,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:51:55,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:51:55,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:51:55,236 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:51:55,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2021-12-21 14:51:55,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dded87f64/5098a65467fe4ae0a8d2b25cf5192e25/FLAG0baf725fc [2021-12-21 14:51:55,662 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:51:55,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2021-12-21 14:51:55,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dded87f64/5098a65467fe4ae0a8d2b25cf5192e25/FLAG0baf725fc [2021-12-21 14:51:55,691 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dded87f64/5098a65467fe4ae0a8d2b25cf5192e25 [2021-12-21 14:51:55,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:51:55,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:51:55,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:51:55,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:51:55,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:51:55,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:55,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32070e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55, skipping insertion in model container [2021-12-21 14:51:55,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:55,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:51:55,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:51:55,845 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.08.cil-2.c[914,927] [2021-12-21 14:51:55,875 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.08.cil-2.c[7115,7128] [2021-12-21 14:51:55,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:51:55,925 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:51:55,932 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.08.cil-2.c[914,927] [2021-12-21 14:51:55,943 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.08.cil-2.c[7115,7128] [2021-12-21 14:51:55,970 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:51:55,984 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:51:55,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55 WrapperNode [2021-12-21 14:51:55,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:51:55,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:51:55,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:51:55,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:51:55,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:56,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:56,051 INFO L137 Inliner]: procedures = 69, calls = 82, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 813 [2021-12-21 14:51:56,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:51:56,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:51:56,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:51:56,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:51:56,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:56,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:56,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:56,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:56,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:56,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:56,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:56,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:51:56,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:51:56,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:51:56,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:51:56,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55" (1/1) ... [2021-12-21 14:51:56,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:51:56,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:51:56,148 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) [2021-12-21 14:51:56,163 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 [2021-12-21 14:51:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:51:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:51:56,175 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:51:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-21 14:51:56,177 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-21 14:51:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:51:56,177 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:51:56,177 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:51:56,178 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:51:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-21 14:51:56,178 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-21 14:51:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:51:56,178 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:51:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:51:56,178 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:51:56,178 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-21 14:51:56,179 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-21 14:51:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-21 14:51:56,179 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-21 14:51:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-21 14:51:56,179 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-21 14:51:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:51:56,179 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:51:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:51:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:51:56,180 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:51:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-21 14:51:56,180 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-21 14:51:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:51:56,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:51:56,180 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:51:56,181 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:51:56,181 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-21 14:51:56,181 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-21 14:51:56,310 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:51:56,311 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:51:56,750 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:51:56,759 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:51:56,760 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-21 14:51:56,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:51:56 BoogieIcfgContainer [2021-12-21 14:51:56,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:51:56,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:51:56,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:51:56,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:51:56,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:51:55" (1/3) ... [2021-12-21 14:51:56,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31704e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:51:56, skipping insertion in model container [2021-12-21 14:51:56,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:51:55" (2/3) ... [2021-12-21 14:51:56,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31704e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:51:56, skipping insertion in model container [2021-12-21 14:51:56,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:51:56" (3/3) ... [2021-12-21 14:51:56,769 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2021-12-21 14:51:56,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:51:56,775 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:51:56,827 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:51:56,833 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 [2021-12-21 14:51:56,833 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:51:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 391 states, 335 states have (on average 1.626865671641791) internal successors, (545), 343 states have internal predecessors, (545), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-12-21 14:51:56,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:51:56,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:56,872 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] [2021-12-21 14:51:56,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:56,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2101552932, now seen corresponding path program 1 times [2021-12-21 14:51:56,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:56,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385010999] [2021-12-21 14:51:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:56,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:56,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:57,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:57,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:57,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:57,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:57,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:57,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:57,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:57,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385010999] [2021-12-21 14:51:57,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385010999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:57,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:57,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:51:57,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968219593] [2021-12-21 14:51:57,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:57,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:51:57,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:51:57,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:51:57,272 INFO L87 Difference]: Start difference. First operand has 391 states, 335 states have (on average 1.626865671641791) internal successors, (545), 343 states have internal predecessors, (545), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) 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) [2021-12-21 14:51:57,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:57,991 INFO L93 Difference]: Finished difference Result 892 states and 1408 transitions. [2021-12-21 14:51:57,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:51:57,993 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 [2021-12-21 14:51:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:58,010 INFO L225 Difference]: With dead ends: 892 [2021-12-21 14:51:58,010 INFO L226 Difference]: Without dead ends: 515 [2021-12-21 14:51:58,018 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 [2021-12-21 14:51:58,021 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 1227 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:58,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1232 Valid, 1742 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:51:58,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-12-21 14:51:58,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 476. [2021-12-21 14:51:58,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 403 states have (on average 1.5086848635235732) internal successors, (608), 410 states have internal predecessors, (608), 49 states have call successors, (49), 22 states have call predecessors, (49), 22 states have return successors, (50), 46 states have call predecessors, (50), 45 states have call successors, (50) [2021-12-21 14:51:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 707 transitions. [2021-12-21 14:51:58,108 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 707 transitions. Word has length 65 [2021-12-21 14:51:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:58,109 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 707 transitions. [2021-12-21 14:51:58,109 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) [2021-12-21 14:51:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 707 transitions. [2021-12-21 14:51:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:51:58,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:58,117 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] [2021-12-21 14:51:58,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:51:58,118 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:58,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:58,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1789628413, now seen corresponding path program 1 times [2021-12-21 14:51:58,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:58,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799783002] [2021-12-21 14:51:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:58,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:58,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:58,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799783002] [2021-12-21 14:51:58,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799783002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:58,216 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:58,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:51:58,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476654571] [2021-12-21 14:51:58,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:58,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:51:58,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:58,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:51:58,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:51:58,219 INFO L87 Difference]: Start difference. First operand 476 states and 707 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) [2021-12-21 14:51:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:58,947 INFO L93 Difference]: Finished difference Result 823 states and 1184 transitions. [2021-12-21 14:51:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 14:51:58,948 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 [2021-12-21 14:51:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:58,951 INFO L225 Difference]: With dead ends: 823 [2021-12-21 14:51:58,951 INFO L226 Difference]: Without dead ends: 646 [2021-12-21 14:51:58,952 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 [2021-12-21 14:51:58,953 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 1155 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:58,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1182 Valid, 2256 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:51:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-12-21 14:51:58,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 572. [2021-12-21 14:51:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 479 states have (on average 1.4864300626304803) internal successors, (712), 488 states have internal predecessors, (712), 60 states have call successors, (60), 29 states have call predecessors, (60), 31 states have return successors, (69), 58 states have call predecessors, (69), 56 states have call successors, (69) [2021-12-21 14:51:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 841 transitions. [2021-12-21 14:51:58,982 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 841 transitions. Word has length 65 [2021-12-21 14:51:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:58,982 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 841 transitions. [2021-12-21 14:51:58,982 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) [2021-12-21 14:51:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 841 transitions. [2021-12-21 14:51:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:51:58,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:58,984 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] [2021-12-21 14:51:58,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:51:58,985 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:58,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:58,985 INFO L85 PathProgramCache]: Analyzing trace with hash 476752773, now seen corresponding path program 1 times [2021-12-21 14:51:58,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:58,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857279206] [2021-12-21 14:51:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:58,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:59,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:59,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857279206] [2021-12-21 14:51:59,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857279206] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:59,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:59,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:51:59,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332438709] [2021-12-21 14:51:59,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:59,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:51:59,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:51:59,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:51:59,089 INFO L87 Difference]: Start difference. First operand 572 states and 841 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) [2021-12-21 14:51:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:51:59,809 INFO L93 Difference]: Finished difference Result 873 states and 1255 transitions. [2021-12-21 14:51:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:51:59,809 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 [2021-12-21 14:51:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:51:59,812 INFO L225 Difference]: With dead ends: 873 [2021-12-21 14:51:59,812 INFO L226 Difference]: Without dead ends: 606 [2021-12-21 14:51:59,813 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 [2021-12-21 14:51:59,814 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 731 mSDsluCounter, 1864 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 2427 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:51:59,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 2427 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:51:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-12-21 14:51:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 577. [2021-12-21 14:51:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 483 states have (on average 1.4782608695652173) internal successors, (714), 492 states have internal predecessors, (714), 60 states have call successors, (60), 29 states have call predecessors, (60), 32 states have return successors, (70), 59 states have call predecessors, (70), 56 states have call successors, (70) [2021-12-21 14:51:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 844 transitions. [2021-12-21 14:51:59,834 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 844 transitions. Word has length 65 [2021-12-21 14:51:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:51:59,835 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 844 transitions. [2021-12-21 14:51:59,835 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) [2021-12-21 14:51:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 844 transitions. [2021-12-21 14:51:59,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:51:59,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:51:59,837 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] [2021-12-21 14:51:59,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:51:59,837 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:51:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:51:59,837 INFO L85 PathProgramCache]: Analyzing trace with hash -552606525, now seen corresponding path program 1 times [2021-12-21 14:51:59,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:51:59,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45624417] [2021-12-21 14:51:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:51:59,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:51:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:51:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:51:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:51:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:51:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:51:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:51:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:51:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:51:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:51:59,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:51:59,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45624417] [2021-12-21 14:51:59,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45624417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:51:59,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:51:59,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:51:59,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614423066] [2021-12-21 14:51:59,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:51:59,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:51:59,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:51:59,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:51:59,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:51:59,937 INFO L87 Difference]: Start difference. First operand 577 states and 844 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 14:52:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:01,272 INFO L93 Difference]: Finished difference Result 2239 states and 3116 transitions. [2021-12-21 14:52:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-21 14:52:01,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-21 14:52:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:01,279 INFO L225 Difference]: With dead ends: 2239 [2021-12-21 14:52:01,279 INFO L226 Difference]: Without dead ends: 1967 [2021-12-21 14:52:01,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 14:52:01,280 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 2513 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:01,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2531 Valid, 2205 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:52:01,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-12-21 14:52:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1717. [2021-12-21 14:52:01,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1383 states have (on average 1.3702096890817064) internal successors, (1895), 1412 states have internal predecessors, (1895), 177 states have call successors, (177), 131 states have call predecessors, (177), 155 states have return successors, (256), 177 states have call predecessors, (256), 173 states have call successors, (256) [2021-12-21 14:52:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2328 transitions. [2021-12-21 14:52:01,344 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2328 transitions. Word has length 65 [2021-12-21 14:52:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:01,344 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 2328 transitions. [2021-12-21 14:52:01,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-21 14:52:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2328 transitions. [2021-12-21 14:52:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:01,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:01,346 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] [2021-12-21 14:52:01,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:52:01,346 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:01,347 INFO L85 PathProgramCache]: Analyzing trace with hash 498842564, now seen corresponding path program 1 times [2021-12-21 14:52:01,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:01,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497714889] [2021-12-21 14:52:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:01,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:01,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:01,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497714889] [2021-12-21 14:52:01,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497714889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:01,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:01,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:52:01,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146362800] [2021-12-21 14:52:01,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:01,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:52:01,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:01,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:52:01,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:52:01,426 INFO L87 Difference]: Start difference. First operand 1717 states and 2328 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) [2021-12-21 14:52:02,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:02,102 INFO L93 Difference]: Finished difference Result 3318 states and 4452 transitions. [2021-12-21 14:52:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:52:02,103 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 [2021-12-21 14:52:02,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:02,109 INFO L225 Difference]: With dead ends: 3318 [2021-12-21 14:52:02,109 INFO L226 Difference]: Without dead ends: 1906 [2021-12-21 14:52:02,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:52:02,113 INFO L933 BasicCegarLoop]: 561 mSDtfsCounter, 490 mSDsluCounter, 2121 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:02,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 2682 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:52:02,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-12-21 14:52:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1762. [2021-12-21 14:52:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1419 states have (on average 1.354474982381959) internal successors, (1922), 1448 states have internal predecessors, (1922), 177 states have call successors, (177), 131 states have call predecessors, (177), 164 states have return successors, (268), 186 states have call predecessors, (268), 173 states have call successors, (268) [2021-12-21 14:52:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 2367 transitions. [2021-12-21 14:52:02,241 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 2367 transitions. Word has length 65 [2021-12-21 14:52:02,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:02,242 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 2367 transitions. [2021-12-21 14:52:02,242 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) [2021-12-21 14:52:02,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 2367 transitions. [2021-12-21 14:52:02,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:02,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:02,258 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] [2021-12-21 14:52:02,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:52:02,258 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1885045958, now seen corresponding path program 1 times [2021-12-21 14:52:02,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:02,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571920694] [2021-12-21 14:52:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:02,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:02,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:02,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:02,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:02,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:02,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:02,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:02,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:02,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:02,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571920694] [2021-12-21 14:52:02,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571920694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:02,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:02,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:52:02,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388196610] [2021-12-21 14:52:02,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:02,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:52:02,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:02,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:52:02,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:52:02,363 INFO L87 Difference]: Start difference. First operand 1762 states and 2367 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) [2021-12-21 14:52:03,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:03,084 INFO L93 Difference]: Finished difference Result 3197 states and 4206 transitions. [2021-12-21 14:52:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 14:52:03,084 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 [2021-12-21 14:52:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:03,091 INFO L225 Difference]: With dead ends: 3197 [2021-12-21 14:52:03,092 INFO L226 Difference]: Without dead ends: 1960 [2021-12-21 14:52:03,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-21 14:52:03,096 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 1131 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:03,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 1978 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:52:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-12-21 14:52:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1740. [2021-12-21 14:52:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1405 states have (on average 1.3508896797153025) internal successors, (1898), 1428 states have internal predecessors, (1898), 177 states have call successors, (177), 131 states have call predecessors, (177), 156 states have return successors, (252), 184 states have call predecessors, (252), 173 states have call successors, (252) [2021-12-21 14:52:03,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2327 transitions. [2021-12-21 14:52:03,165 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2327 transitions. Word has length 65 [2021-12-21 14:52:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:03,166 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 2327 transitions. [2021-12-21 14:52:03,167 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) [2021-12-21 14:52:03,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2327 transitions. [2021-12-21 14:52:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:03,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:03,168 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] [2021-12-21 14:52:03,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:52:03,169 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:03,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:03,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1751032452, now seen corresponding path program 1 times [2021-12-21 14:52:03,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:03,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160119019] [2021-12-21 14:52:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:03,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:03,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:03,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:03,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160119019] [2021-12-21 14:52:03,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160119019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:03,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:03,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:03,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8980273] [2021-12-21 14:52:03,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:03,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:03,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:03,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:03,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:03,224 INFO L87 Difference]: Start difference. First operand 1740 states and 2327 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) [2021-12-21 14:52:03,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:03,574 INFO L93 Difference]: Finished difference Result 4815 states and 6306 transitions. [2021-12-21 14:52:03,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:52:03,575 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 [2021-12-21 14:52:03,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:03,584 INFO L225 Difference]: With dead ends: 4815 [2021-12-21 14:52:03,585 INFO L226 Difference]: Without dead ends: 3383 [2021-12-21 14:52:03,587 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 [2021-12-21 14:52:03,587 INFO L933 BasicCegarLoop]: 544 mSDtfsCounter, 1650 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:03,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1681 Valid, 1121 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:52:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-12-21 14:52:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 3111. [2021-12-21 14:52:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2471 states have (on average 1.301092675030352) internal successors, (3215), 2515 states have internal predecessors, (3215), 329 states have call successors, (329), 254 states have call predecessors, (329), 309 states have return successors, (524), 348 states have call predecessors, (524), 325 states have call successors, (524) [2021-12-21 14:52:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 4068 transitions. [2021-12-21 14:52:03,676 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 4068 transitions. Word has length 65 [2021-12-21 14:52:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:03,676 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 4068 transitions. [2021-12-21 14:52:03,676 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) [2021-12-21 14:52:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 4068 transitions. [2021-12-21 14:52:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:52:03,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:03,678 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] [2021-12-21 14:52:03,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:52:03,678 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:03,678 INFO L85 PathProgramCache]: Analyzing trace with hash -869770994, now seen corresponding path program 1 times [2021-12-21 14:52:03,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:03,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195275818] [2021-12-21 14:52:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:03,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:03,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:03,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195275818] [2021-12-21 14:52:03,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195275818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:03,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:03,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:03,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355437770] [2021-12-21 14:52:03,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:03,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:03,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:03,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:03,724 INFO L87 Difference]: Start difference. First operand 3111 states and 4068 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) [2021-12-21 14:52:04,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:04,250 INFO L93 Difference]: Finished difference Result 8129 states and 10582 transitions. [2021-12-21 14:52:04,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:52:04,251 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 [2021-12-21 14:52:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:04,272 INFO L225 Difference]: With dead ends: 8129 [2021-12-21 14:52:04,287 INFO L226 Difference]: Without dead ends: 5305 [2021-12-21 14:52:04,295 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 [2021-12-21 14:52:04,311 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 934 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:04,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [942 Valid, 1412 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 14:52:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5305 states. [2021-12-21 14:52:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5305 to 4789. [2021-12-21 14:52:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4789 states, 3756 states have (on average 1.2819488817891374) internal successors, (4815), 3807 states have internal predecessors, (4815), 523 states have call successors, (523), 428 states have call predecessors, (523), 508 states have return successors, (845), 560 states have call predecessors, (845), 519 states have call successors, (845) [2021-12-21 14:52:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4789 states to 4789 states and 6183 transitions. [2021-12-21 14:52:04,555 INFO L78 Accepts]: Start accepts. Automaton has 4789 states and 6183 transitions. Word has length 66 [2021-12-21 14:52:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:04,556 INFO L470 AbstractCegarLoop]: Abstraction has 4789 states and 6183 transitions. [2021-12-21 14:52:04,556 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) [2021-12-21 14:52:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 4789 states and 6183 transitions. [2021-12-21 14:52:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 14:52:04,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:04,559 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] [2021-12-21 14:52:04,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:52:04,559 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash -79299166, now seen corresponding path program 1 times [2021-12-21 14:52:04,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:04,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498147503] [2021-12-21 14:52:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:04,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:04,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:04,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:04,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:04,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:04,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:04,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:04,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:04,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:04,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498147503] [2021-12-21 14:52:04,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498147503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:04,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:04,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:04,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823483292] [2021-12-21 14:52:04,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:04,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:04,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:04,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:04,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:04,645 INFO L87 Difference]: Start difference. First operand 4789 states and 6183 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) [2021-12-21 14:52:05,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:05,110 INFO L93 Difference]: Finished difference Result 6419 states and 8185 transitions. [2021-12-21 14:52:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:52:05,110 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 [2021-12-21 14:52:05,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:05,138 INFO L225 Difference]: With dead ends: 6419 [2021-12-21 14:52:05,138 INFO L226 Difference]: Without dead ends: 6416 [2021-12-21 14:52:05,142 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 [2021-12-21 14:52:05,143 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 1639 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:05,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1648 Valid, 1409 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:52:05,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6416 states. [2021-12-21 14:52:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6416 to 5843. [2021-12-21 14:52:05,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5843 states, 4559 states have (on average 1.2689186225049354) internal successors, (5785), 4619 states have internal predecessors, (5785), 649 states have call successors, (649), 542 states have call predecessors, (649), 633 states have return successors, (1038), 688 states have call predecessors, (1038), 646 states have call successors, (1038) [2021-12-21 14:52:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5843 states to 5843 states and 7472 transitions. [2021-12-21 14:52:05,373 INFO L78 Accepts]: Start accepts. Automaton has 5843 states and 7472 transitions. Word has length 73 [2021-12-21 14:52:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:05,373 INFO L470 AbstractCegarLoop]: Abstraction has 5843 states and 7472 transitions. [2021-12-21 14:52:05,373 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) [2021-12-21 14:52:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 5843 states and 7472 transitions. [2021-12-21 14:52:05,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 14:52:05,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:05,375 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] [2021-12-21 14:52:05,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:52:05,375 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:05,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:05,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1835525111, now seen corresponding path program 1 times [2021-12-21 14:52:05,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:05,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315785517] [2021-12-21 14:52:05,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:05,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:05,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:05,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:05,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:05,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:05,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:05,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:05,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:05,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315785517] [2021-12-21 14:52:05,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315785517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:52:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244128667] [2021-12-21 14:52:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:05,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:52:05,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:52:05,488 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) [2021-12-21 14:52:05,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:52:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:05,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 14:52:05,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:52:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:05,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:52:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:06,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244128667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:52:06,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:52:06,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-21 14:52:06,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945876489] [2021-12-21 14:52:06,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:52:06,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:52:06,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:52:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:52:06,175 INFO L87 Difference]: Start difference. First operand 5843 states and 7472 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) [2021-12-21 14:52:07,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:07,794 INFO L93 Difference]: Finished difference Result 13489 states and 17000 transitions. [2021-12-21 14:52:07,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 14:52:07,794 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 [2021-12-21 14:52:07,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:07,855 INFO L225 Difference]: With dead ends: 13489 [2021-12-21 14:52:07,855 INFO L226 Difference]: Without dead ends: 13486 [2021-12-21 14:52:07,861 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 [2021-12-21 14:52:07,861 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 1523 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 2785 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:07,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 2785 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:52:07,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13486 states. [2021-12-21 14:52:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13486 to 11101. [2021-12-21 14:52:08,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11101 states, 8651 states have (on average 1.2592763842330366) internal successors, (10894), 8763 states have internal predecessors, (10894), 1215 states have call successors, (1215), 1032 states have call predecessors, (1215), 1233 states have return successors, (1977), 1312 states have call predecessors, (1977), 1212 states have call successors, (1977) [2021-12-21 14:52:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11101 states to 11101 states and 14086 transitions. [2021-12-21 14:52:08,409 INFO L78 Accepts]: Start accepts. Automaton has 11101 states and 14086 transitions. Word has length 74 [2021-12-21 14:52:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:08,410 INFO L470 AbstractCegarLoop]: Abstraction has 11101 states and 14086 transitions. [2021-12-21 14:52:08,410 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) [2021-12-21 14:52:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11101 states and 14086 transitions. [2021-12-21 14:52:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 14:52:08,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:08,412 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] [2021-12-21 14:52:08,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 14:52:08,629 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 [2021-12-21 14:52:08,630 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:08,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1541776738, now seen corresponding path program 2 times [2021-12-21 14:52:08,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:08,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23006486] [2021-12-21 14:52:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:08,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:08,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:08,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:08,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:08,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:08,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:08,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:08,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:08,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:08,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23006486] [2021-12-21 14:52:08,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23006486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:08,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:08,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:08,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913408036] [2021-12-21 14:52:08,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:08,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:08,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:08,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:08,689 INFO L87 Difference]: Start difference. First operand 11101 states and 14086 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) [2021-12-21 14:52:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:09,348 INFO L93 Difference]: Finished difference Result 17644 states and 22428 transitions. [2021-12-21 14:52:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 14:52:09,348 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 [2021-12-21 14:52:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:09,369 INFO L225 Difference]: With dead ends: 17644 [2021-12-21 14:52:09,369 INFO L226 Difference]: Without dead ends: 7706 [2021-12-21 14:52:09,387 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 [2021-12-21 14:52:09,388 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 1000 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:09,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 1528 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:52:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2021-12-21 14:52:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 7154. [2021-12-21 14:52:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 5598 states have (on average 1.2386566630939622) internal successors, (6934), 5666 states have internal predecessors, (6934), 782 states have call successors, (782), 656 states have call predecessors, (782), 772 states have return successors, (1196), 838 states have call predecessors, (1196), 779 states have call successors, (1196) [2021-12-21 14:52:09,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 8912 transitions. [2021-12-21 14:52:09,745 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 8912 transitions. Word has length 77 [2021-12-21 14:52:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:09,745 INFO L470 AbstractCegarLoop]: Abstraction has 7154 states and 8912 transitions. [2021-12-21 14:52:09,745 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) [2021-12-21 14:52:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 8912 transitions. [2021-12-21 14:52:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 14:52:09,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:09,748 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] [2021-12-21 14:52:09,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:52:09,748 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:09,749 INFO L85 PathProgramCache]: Analyzing trace with hash 68149481, now seen corresponding path program 1 times [2021-12-21 14:52:09,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:09,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004651026] [2021-12-21 14:52:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:09,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 14:52:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 14:52:09,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004651026] [2021-12-21 14:52:09,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004651026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:09,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:09,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:52:09,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189254340] [2021-12-21 14:52:09,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:09,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:52:09,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:09,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:52:09,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:52:09,828 INFO L87 Difference]: Start difference. First operand 7154 states and 8912 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) [2021-12-21 14:52:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:11,024 INFO L93 Difference]: Finished difference Result 21028 states and 26129 transitions. [2021-12-21 14:52:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 14:52:11,024 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 [2021-12-21 14:52:11,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:11,062 INFO L225 Difference]: With dead ends: 21028 [2021-12-21 14:52:11,062 INFO L226 Difference]: Without dead ends: 14185 [2021-12-21 14:52:11,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-21 14:52:11,080 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 1475 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:11,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1491 Valid, 1802 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14185 states. [2021-12-21 14:52:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14185 to 13326. [2021-12-21 14:52:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13326 states, 10274 states have (on average 1.208974109402375) internal successors, (12421), 10448 states have internal predecessors, (12421), 1498 states have call successors, (1498), 1260 states have call predecessors, (1498), 1552 states have return successors, (2599), 1630 states have call predecessors, (2599), 1495 states have call successors, (2599) [2021-12-21 14:52:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 16518 transitions. [2021-12-21 14:52:11,590 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 16518 transitions. Word has length 84 [2021-12-21 14:52:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:11,590 INFO L470 AbstractCegarLoop]: Abstraction has 13326 states and 16518 transitions. [2021-12-21 14:52:11,590 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) [2021-12-21 14:52:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 16518 transitions. [2021-12-21 14:52:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 14:52:11,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:11,595 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] [2021-12-21 14:52:11,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:52:11,595 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:11,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1418215744, now seen corresponding path program 1 times [2021-12-21 14:52:11,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:11,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274753553] [2021-12-21 14:52:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:11,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:52:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 14:52:11,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:11,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274753553] [2021-12-21 14:52:11,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274753553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:11,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:11,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:52:11,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467270351] [2021-12-21 14:52:11,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:11,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:52:11,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:11,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:52:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:52:11,719 INFO L87 Difference]: Start difference. First operand 13326 states and 16518 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) [2021-12-21 14:52:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:12,922 INFO L93 Difference]: Finished difference Result 24200 states and 29837 transitions. [2021-12-21 14:52:12,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 14:52:12,923 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 [2021-12-21 14:52:12,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:12,949 INFO L225 Difference]: With dead ends: 24200 [2021-12-21 14:52:12,949 INFO L226 Difference]: Without dead ends: 11801 [2021-12-21 14:52:12,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-21 14:52:12,969 INFO L933 BasicCegarLoop]: 610 mSDtfsCounter, 2042 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2084 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:12,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2084 Valid, 2099 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:52:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11801 states. [2021-12-21 14:52:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11801 to 10901. [2021-12-21 14:52:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10901 states, 8440 states have (on average 1.2004739336492891) internal successors, (10132), 8581 states have internal predecessors, (10132), 1199 states have call successors, (1199), 1009 states have call predecessors, (1199), 1260 states have return successors, (1931), 1320 states have call predecessors, (1931), 1196 states have call successors, (1931) [2021-12-21 14:52:13,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10901 states to 10901 states and 13262 transitions. [2021-12-21 14:52:13,461 INFO L78 Accepts]: Start accepts. Automaton has 10901 states and 13262 transitions. Word has length 93 [2021-12-21 14:52:13,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:13,462 INFO L470 AbstractCegarLoop]: Abstraction has 10901 states and 13262 transitions. [2021-12-21 14:52:13,462 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) [2021-12-21 14:52:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 10901 states and 13262 transitions. [2021-12-21 14:52:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:13,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:13,474 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] [2021-12-21 14:52:13,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:52:13,475 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1086528831, now seen corresponding path program 1 times [2021-12-21 14:52:13,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:13,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775292143] [2021-12-21 14:52:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:13,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 14:52:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:52:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:52:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 14:52:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 14:52:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-21 14:52:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 14:52:13,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:13,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775292143] [2021-12-21 14:52:13,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775292143] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:52:13,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717045078] [2021-12-21 14:52:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:13,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:52:13,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:52:13,567 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) [2021-12-21 14:52:13,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:52:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:13,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 14:52:13,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:52:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 14:52:13,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:52:13,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717045078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:13,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:52:13,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-21 14:52:13,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872458787] [2021-12-21 14:52:13,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:13,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:13,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:13,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-21 14:52:13,897 INFO L87 Difference]: Start difference. First operand 10901 states and 13262 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) [2021-12-21 14:52:14,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:14,119 INFO L93 Difference]: Finished difference Result 16049 states and 19482 transitions. [2021-12-21 14:52:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:14,119 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 [2021-12-21 14:52:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:14,131 INFO L225 Difference]: With dead ends: 16049 [2021-12-21 14:52:14,131 INFO L226 Difference]: Without dead ends: 5467 [2021-12-21 14:52:14,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-21 14:52:14,145 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 34 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 2828 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 [2021-12-21 14:52:14,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 2828 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:52:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2021-12-21 14:52:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 5025. [2021-12-21 14:52:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 4005 states have (on average 1.1980024968789014) internal successors, (4798), 4044 states have internal predecessors, (4798), 501 states have call successors, (501), 403 states have call predecessors, (501), 517 states have return successors, (771), 578 states have call predecessors, (771), 498 states have call successors, (771) [2021-12-21 14:52:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 6070 transitions. [2021-12-21 14:52:14,315 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 6070 transitions. Word has length 145 [2021-12-21 14:52:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:14,315 INFO L470 AbstractCegarLoop]: Abstraction has 5025 states and 6070 transitions. [2021-12-21 14:52:14,316 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) [2021-12-21 14:52:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 6070 transitions. [2021-12-21 14:52:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:14,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:14,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:14,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 14:52:14,540 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 [2021-12-21 14:52:14,540 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1051309190, now seen corresponding path program 1 times [2021-12-21 14:52:14,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:14,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034869427] [2021-12-21 14:52:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:14,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:14,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:14,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034869427] [2021-12-21 14:52:14,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034869427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:14,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:14,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:52:14,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855369856] [2021-12-21 14:52:14,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:14,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:52:14,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:14,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:52:14,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:52:14,612 INFO L87 Difference]: Start difference. First operand 5025 states and 6070 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:15,604 INFO L93 Difference]: Finished difference Result 5396 states and 6664 transitions. [2021-12-21 14:52:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:15,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:15,614 INFO L225 Difference]: With dead ends: 5396 [2021-12-21 14:52:15,614 INFO L226 Difference]: Without dead ends: 5123 [2021-12-21 14:52:15,617 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 [2021-12-21 14:52:15,618 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 841 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:15,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 1116 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:15,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2021-12-21 14:52:15,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 5025. [2021-12-21 14:52:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 4005 states have (on average 1.1977528089887641) internal successors, (4797), 4044 states have internal predecessors, (4797), 501 states have call successors, (501), 403 states have call predecessors, (501), 517 states have return successors, (771), 578 states have call predecessors, (771), 498 states have call successors, (771) [2021-12-21 14:52:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 6069 transitions. [2021-12-21 14:52:15,882 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 6069 transitions. Word has length 135 [2021-12-21 14:52:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:15,883 INFO L470 AbstractCegarLoop]: Abstraction has 5025 states and 6069 transitions. [2021-12-21 14:52:15,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 6069 transitions. [2021-12-21 14:52:15,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:15,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:15,889 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] [2021-12-21 14:52:15,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:52:15,889 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:15,889 INFO L85 PathProgramCache]: Analyzing trace with hash 999099708, now seen corresponding path program 1 times [2021-12-21 14:52:15,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:15,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383733304] [2021-12-21 14:52:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:15,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:15,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:15,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:15,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:15,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:15,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:15,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:15,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383733304] [2021-12-21 14:52:15,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383733304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:15,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:15,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:15,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874861618] [2021-12-21 14:52:15,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:15,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:15,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:15,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:15,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:15,964 INFO L87 Difference]: Start difference. First operand 5025 states and 6069 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:17,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:17,634 INFO L93 Difference]: Finished difference Result 5767 states and 7260 transitions. [2021-12-21 14:52:17,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:52:17,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:17,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:17,647 INFO L225 Difference]: With dead ends: 5767 [2021-12-21 14:52:17,647 INFO L226 Difference]: Without dead ends: 5499 [2021-12-21 14:52:17,650 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 [2021-12-21 14:52:17,650 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 1326 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:17,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1351 Valid, 1580 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1493 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 14:52:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5499 states. [2021-12-21 14:52:17,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5499 to 5302. [2021-12-21 14:52:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5302 states, 4258 states have (on average 1.2209957726632221) internal successors, (5199), 4298 states have internal predecessors, (5199), 518 states have call successors, (518), 409 states have call predecessors, (518), 524 states have return successors, (791), 595 states have call predecessors, (791), 515 states have call successors, (791) [2021-12-21 14:52:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5302 states to 5302 states and 6508 transitions. [2021-12-21 14:52:17,915 INFO L78 Accepts]: Start accepts. Automaton has 5302 states and 6508 transitions. Word has length 135 [2021-12-21 14:52:17,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:17,915 INFO L470 AbstractCegarLoop]: Abstraction has 5302 states and 6508 transitions. [2021-12-21 14:52:17,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5302 states and 6508 transitions. [2021-12-21 14:52:17,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:17,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:17,922 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] [2021-12-21 14:52:17,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:52:17,922 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:17,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:17,922 INFO L85 PathProgramCache]: Analyzing trace with hash -362902728, now seen corresponding path program 1 times [2021-12-21 14:52:17,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:17,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203074257] [2021-12-21 14:52:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:17,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:18,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:18,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203074257] [2021-12-21 14:52:18,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203074257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:18,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:18,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:18,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540797247] [2021-12-21 14:52:18,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:18,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:18,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:18,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:18,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:18,021 INFO L87 Difference]: Start difference. First operand 5302 states and 6508 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:20,278 INFO L93 Difference]: Finished difference Result 6430 states and 8318 transitions. [2021-12-21 14:52:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:20,290 INFO L225 Difference]: With dead ends: 6430 [2021-12-21 14:52:20,291 INFO L226 Difference]: Without dead ends: 5885 [2021-12-21 14:52:20,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:20,293 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 1337 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 2471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:20,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 2577 Invalid, 2471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2366 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 14:52:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2021-12-21 14:52:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5560. [2021-12-21 14:52:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 4492 states have (on average 1.2384238646482635) internal successors, (5563), 4533 states have internal predecessors, (5563), 535 states have call successors, (535), 415 states have call predecessors, (535), 531 states have return successors, (810), 613 states have call predecessors, (810), 532 states have call successors, (810) [2021-12-21 14:52:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 6908 transitions. [2021-12-21 14:52:20,629 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 6908 transitions. Word has length 135 [2021-12-21 14:52:20,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:20,629 INFO L470 AbstractCegarLoop]: Abstraction has 5560 states and 6908 transitions. [2021-12-21 14:52:20,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 6908 transitions. [2021-12-21 14:52:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:20,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:20,637 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] [2021-12-21 14:52:20,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:52:20,637 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:20,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:20,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1566029498, now seen corresponding path program 1 times [2021-12-21 14:52:20,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:20,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462251239] [2021-12-21 14:52:20,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:20,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:20,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:20,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:20,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462251239] [2021-12-21 14:52:20,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462251239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:20,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:20,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:20,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502098912] [2021-12-21 14:52:20,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:20,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:20,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:20,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:20,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:20,740 INFO L87 Difference]: Start difference. First operand 5560 states and 6908 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:22,967 INFO L93 Difference]: Finished difference Result 7407 states and 9866 transitions. [2021-12-21 14:52:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:22,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:22,987 INFO L225 Difference]: With dead ends: 7407 [2021-12-21 14:52:22,987 INFO L226 Difference]: Without dead ends: 6604 [2021-12-21 14:52:22,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:22,993 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 1337 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 2369 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 2480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:22,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1362 Valid, 2563 Invalid, 2480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2369 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 14:52:22,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2021-12-21 14:52:23,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 6077. [2021-12-21 14:52:23,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 4961 states have (on average 1.2682926829268293) internal successors, (6292), 5004 states have internal predecessors, (6292), 569 states have call successors, (569), 427 states have call predecessors, (569), 545 states have return successors, (852), 649 states have call predecessors, (852), 566 states have call successors, (852) [2021-12-21 14:52:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 7713 transitions. [2021-12-21 14:52:23,335 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 7713 transitions. Word has length 135 [2021-12-21 14:52:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:23,336 INFO L470 AbstractCegarLoop]: Abstraction has 6077 states and 7713 transitions. [2021-12-21 14:52:23,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:23,336 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 7713 transitions. [2021-12-21 14:52:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:23,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:23,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:23,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:52:23,342 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:23,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:23,343 INFO L85 PathProgramCache]: Analyzing trace with hash -727051528, now seen corresponding path program 1 times [2021-12-21 14:52:23,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:23,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319769722] [2021-12-21 14:52:23,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:23,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:23,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:23,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319769722] [2021-12-21 14:52:23,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319769722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:23,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:23,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:23,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248461265] [2021-12-21 14:52:23,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:23,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:23,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:23,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:23,482 INFO L87 Difference]: Start difference. First operand 6077 states and 7713 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:25,648 INFO L93 Difference]: Finished difference Result 9285 states and 12827 transitions. [2021-12-21 14:52:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:25,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:25,669 INFO L225 Difference]: With dead ends: 9285 [2021-12-21 14:52:25,669 INFO L226 Difference]: Without dead ends: 7965 [2021-12-21 14:52:25,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:25,676 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 1332 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 2349 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:25,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 2555 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2349 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 14:52:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2021-12-21 14:52:25,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7117. [2021-12-21 14:52:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 5905 states have (on average 1.3141405588484336) internal successors, (7760), 5952 states have internal predecessors, (7760), 637 states have call successors, (637), 451 states have call predecessors, (637), 573 states have return successors, (942), 721 states have call predecessors, (942), 634 states have call successors, (942) [2021-12-21 14:52:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 9339 transitions. [2021-12-21 14:52:26,013 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 9339 transitions. Word has length 135 [2021-12-21 14:52:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:26,013 INFO L470 AbstractCegarLoop]: Abstraction has 7117 states and 9339 transitions. [2021-12-21 14:52:26,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 9339 transitions. [2021-12-21 14:52:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:26,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:26,020 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] [2021-12-21 14:52:26,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:52:26,020 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:26,020 INFO L85 PathProgramCache]: Analyzing trace with hash -255695178, now seen corresponding path program 1 times [2021-12-21 14:52:26,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:26,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530006063] [2021-12-21 14:52:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:26,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:26,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:26,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530006063] [2021-12-21 14:52:26,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530006063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:26,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:26,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:26,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554057980] [2021-12-21 14:52:26,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:26,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:26,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:26,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:26,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:26,151 INFO L87 Difference]: Start difference. First operand 7117 states and 9339 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:27,374 INFO L93 Difference]: Finished difference Result 10338 states and 14504 transitions. [2021-12-21 14:52:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:27,395 INFO L225 Difference]: With dead ends: 10338 [2021-12-21 14:52:27,395 INFO L226 Difference]: Without dead ends: 7978 [2021-12-21 14:52:27,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:52:27,404 INFO L933 BasicCegarLoop]: 576 mSDtfsCounter, 1194 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:27,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 1299 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:27,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7978 states. [2021-12-21 14:52:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7978 to 7117. [2021-12-21 14:52:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 5905 states have (on average 1.3126164267569855) internal successors, (7751), 5952 states have internal predecessors, (7751), 637 states have call successors, (637), 451 states have call predecessors, (637), 573 states have return successors, (942), 721 states have call predecessors, (942), 634 states have call successors, (942) [2021-12-21 14:52:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 9330 transitions. [2021-12-21 14:52:27,746 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 9330 transitions. Word has length 135 [2021-12-21 14:52:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:27,746 INFO L470 AbstractCegarLoop]: Abstraction has 7117 states and 9330 transitions. [2021-12-21 14:52:27,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 9330 transitions. [2021-12-21 14:52:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:27,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:27,753 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] [2021-12-21 14:52:27,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:52:27,753 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:27,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1903058120, now seen corresponding path program 1 times [2021-12-21 14:52:27,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:27,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213958672] [2021-12-21 14:52:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:27,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:27,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:27,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213958672] [2021-12-21 14:52:27,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213958672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:27,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:27,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:27,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53918341] [2021-12-21 14:52:27,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:27,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:27,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:27,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:27,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:27,832 INFO L87 Difference]: Start difference. First operand 7117 states and 9330 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:29,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:29,067 INFO L93 Difference]: Finished difference Result 10328 states and 14457 transitions. [2021-12-21 14:52:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:29,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:29,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:29,087 INFO L225 Difference]: With dead ends: 10328 [2021-12-21 14:52:29,087 INFO L226 Difference]: Without dead ends: 7968 [2021-12-21 14:52:29,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:52:29,094 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 1192 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:29,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1218 Valid, 1295 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2021-12-21 14:52:29,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 7117. [2021-12-21 14:52:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 5905 states have (on average 1.3110922946655377) internal successors, (7742), 5952 states have internal predecessors, (7742), 637 states have call successors, (637), 451 states have call predecessors, (637), 573 states have return successors, (942), 721 states have call predecessors, (942), 634 states have call successors, (942) [2021-12-21 14:52:29,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 9321 transitions. [2021-12-21 14:52:29,442 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 9321 transitions. Word has length 135 [2021-12-21 14:52:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:29,443 INFO L470 AbstractCegarLoop]: Abstraction has 7117 states and 9321 transitions. [2021-12-21 14:52:29,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:29,443 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 9321 transitions. [2021-12-21 14:52:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:29,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:29,450 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] [2021-12-21 14:52:29,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:52:29,451 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:29,451 INFO L85 PathProgramCache]: Analyzing trace with hash 260558454, now seen corresponding path program 1 times [2021-12-21 14:52:29,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:29,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595396929] [2021-12-21 14:52:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:29,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:29,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:29,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595396929] [2021-12-21 14:52:29,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595396929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:29,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:29,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:29,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323086077] [2021-12-21 14:52:29,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:29,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:29,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:29,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:29,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:29,537 INFO L87 Difference]: Start difference. First operand 7117 states and 9321 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:30,787 INFO L93 Difference]: Finished difference Result 10318 states and 14410 transitions. [2021-12-21 14:52:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:30,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:30,804 INFO L225 Difference]: With dead ends: 10318 [2021-12-21 14:52:30,805 INFO L226 Difference]: Without dead ends: 7958 [2021-12-21 14:52:30,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:52:30,811 INFO L933 BasicCegarLoop]: 546 mSDtfsCounter, 1232 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:30,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1258 Valid, 1268 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2021-12-21 14:52:31,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7117. [2021-12-21 14:52:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 5905 states have (on average 1.3095681625740898) internal successors, (7733), 5952 states have internal predecessors, (7733), 637 states have call successors, (637), 451 states have call predecessors, (637), 573 states have return successors, (942), 721 states have call predecessors, (942), 634 states have call successors, (942) [2021-12-21 14:52:31,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 9312 transitions. [2021-12-21 14:52:31,168 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 9312 transitions. Word has length 135 [2021-12-21 14:52:31,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:31,168 INFO L470 AbstractCegarLoop]: Abstraction has 7117 states and 9312 transitions. [2021-12-21 14:52:31,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:31,168 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 9312 transitions. [2021-12-21 14:52:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:31,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:31,175 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] [2021-12-21 14:52:31,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 14:52:31,175 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:31,175 INFO L85 PathProgramCache]: Analyzing trace with hash -778026120, now seen corresponding path program 1 times [2021-12-21 14:52:31,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:31,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94569766] [2021-12-21 14:52:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:31,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:31,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:31,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:31,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94569766] [2021-12-21 14:52:31,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94569766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:31,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:31,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:31,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546662677] [2021-12-21 14:52:31,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:31,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:31,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:31,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:31,256 INFO L87 Difference]: Start difference. First operand 7117 states and 9312 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:33,726 INFO L93 Difference]: Finished difference Result 13021 states and 18591 transitions. [2021-12-21 14:52:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:33,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:33,753 INFO L225 Difference]: With dead ends: 13021 [2021-12-21 14:52:33,753 INFO L226 Difference]: Without dead ends: 10661 [2021-12-21 14:52:33,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:33,762 INFO L933 BasicCegarLoop]: 822 mSDtfsCounter, 1310 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 2532 SdHoareTripleChecker+Invalid, 2396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:33,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1335 Valid, 2532 Invalid, 2396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 14:52:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10661 states. [2021-12-21 14:52:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10661 to 9229. [2021-12-21 14:52:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9229 states, 7825 states have (on average 1.3649840255591055) internal successors, (10681), 7880 states have internal predecessors, (10681), 773 states have call successors, (773), 499 states have call predecessors, (773), 629 states have return successors, (1140), 865 states have call predecessors, (1140), 770 states have call successors, (1140) [2021-12-21 14:52:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9229 states to 9229 states and 12594 transitions. [2021-12-21 14:52:34,262 INFO L78 Accepts]: Start accepts. Automaton has 9229 states and 12594 transitions. Word has length 135 [2021-12-21 14:52:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:34,262 INFO L470 AbstractCegarLoop]: Abstraction has 9229 states and 12594 transitions. [2021-12-21 14:52:34,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 9229 states and 12594 transitions. [2021-12-21 14:52:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:34,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:34,270 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] [2021-12-21 14:52:34,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 14:52:34,271 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:34,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:34,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1543775798, now seen corresponding path program 1 times [2021-12-21 14:52:34,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:34,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102272262] [2021-12-21 14:52:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:34,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:34,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:34,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102272262] [2021-12-21 14:52:34,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102272262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:34,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:34,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:34,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623251632] [2021-12-21 14:52:34,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:34,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:34,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:34,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:34,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:34,351 INFO L87 Difference]: Start difference. First operand 9229 states and 12594 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:37,599 INFO L93 Difference]: Finished difference Result 22491 states and 33369 transitions. [2021-12-21 14:52:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:52:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:37,641 INFO L225 Difference]: With dead ends: 22491 [2021-12-21 14:52:37,641 INFO L226 Difference]: Without dead ends: 18019 [2021-12-21 14:52:37,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:52:37,655 INFO L933 BasicCegarLoop]: 951 mSDtfsCounter, 1392 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 2665 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:37,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1416 Valid, 2653 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2665 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 14:52:37,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18019 states. [2021-12-21 14:52:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18019 to 13414. [2021-12-21 14:52:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13414 states, 11642 states have (on average 1.4220065280879575) internal successors, (16555), 11713 states have internal predecessors, (16555), 1029 states have call successors, (1029), 595 states have call predecessors, (1029), 741 states have return successors, (1574), 1137 states have call predecessors, (1574), 1026 states have call successors, (1574) [2021-12-21 14:52:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13414 states to 13414 states and 19158 transitions. [2021-12-21 14:52:38,459 INFO L78 Accepts]: Start accepts. Automaton has 13414 states and 19158 transitions. Word has length 135 [2021-12-21 14:52:38,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:38,459 INFO L470 AbstractCegarLoop]: Abstraction has 13414 states and 19158 transitions. [2021-12-21 14:52:38,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:38,459 INFO L276 IsEmpty]: Start isEmpty. Operand 13414 states and 19158 transitions. [2021-12-21 14:52:38,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:38,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:38,468 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] [2021-12-21 14:52:38,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 14:52:38,469 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:38,469 INFO L85 PathProgramCache]: Analyzing trace with hash -598084680, now seen corresponding path program 1 times [2021-12-21 14:52:38,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:38,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162422580] [2021-12-21 14:52:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:38,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:38,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:38,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162422580] [2021-12-21 14:52:38,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162422580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:38,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:38,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:38,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961390360] [2021-12-21 14:52:38,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:38,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:38,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:38,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:38,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:38,549 INFO L87 Difference]: Start difference. First operand 13414 states and 19158 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:42,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:42,677 INFO L93 Difference]: Finished difference Result 38962 states and 59359 transitions. [2021-12-21 14:52:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:52:42,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:42,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:42,749 INFO L225 Difference]: With dead ends: 38962 [2021-12-21 14:52:42,749 INFO L226 Difference]: Without dead ends: 30305 [2021-12-21 14:52:42,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:52:42,771 INFO L933 BasicCegarLoop]: 807 mSDtfsCounter, 1601 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 2506 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:42,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1635 Valid, 2506 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 14:52:42,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30305 states. [2021-12-21 14:52:44,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30305 to 21447. [2021-12-21 14:52:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21447 states, 18955 states have (on average 1.4635188604589817) internal successors, (27741), 19058 states have internal predecessors, (27741), 1525 states have call successors, (1525), 787 states have call predecessors, (1525), 965 states have return successors, (2588), 1665 states have call predecessors, (2588), 1522 states have call successors, (2588) [2021-12-21 14:52:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21447 states to 21447 states and 31854 transitions. [2021-12-21 14:52:44,180 INFO L78 Accepts]: Start accepts. Automaton has 21447 states and 31854 transitions. Word has length 135 [2021-12-21 14:52:44,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:44,181 INFO L470 AbstractCegarLoop]: Abstraction has 21447 states and 31854 transitions. [2021-12-21 14:52:44,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21447 states and 31854 transitions. [2021-12-21 14:52:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:44,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:44,196 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] [2021-12-21 14:52:44,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 14:52:44,196 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:44,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:44,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1221366282, now seen corresponding path program 1 times [2021-12-21 14:52:44,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:44,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529739747] [2021-12-21 14:52:44,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:44,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:44,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:44,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529739747] [2021-12-21 14:52:44,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529739747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:44,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:44,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:44,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844390515] [2021-12-21 14:52:44,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:44,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:44,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:44,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:44,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:44,288 INFO L87 Difference]: Start difference. First operand 21447 states and 31854 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:50,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:50,222 INFO L93 Difference]: Finished difference Result 69391 states and 107873 transitions. [2021-12-21 14:52:50,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:52:50,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 135 [2021-12-21 14:52:50,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:50,373 INFO L225 Difference]: With dead ends: 69391 [2021-12-21 14:52:50,373 INFO L226 Difference]: Without dead ends: 52701 [2021-12-21 14:52:50,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:52:50,413 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 1519 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1553 SdHoareTripleChecker+Valid, 2501 SdHoareTripleChecker+Invalid, 2360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:50,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1553 Valid, 2501 Invalid, 2360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 14:52:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52701 states. [2021-12-21 14:52:53,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52701 to 37865. [2021-12-21 14:52:53,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37865 states, 33965 states have (on average 1.497099955836891) internal successors, (50849), 34132 states have internal predecessors, (50849), 2485 states have call successors, (2485), 1171 states have call predecessors, (2485), 1413 states have return successors, (5070), 2689 states have call predecessors, (5070), 2482 states have call successors, (5070) [2021-12-21 14:52:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37865 states to 37865 states and 58404 transitions. [2021-12-21 14:52:53,256 INFO L78 Accepts]: Start accepts. Automaton has 37865 states and 58404 transitions. Word has length 135 [2021-12-21 14:52:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:53,257 INFO L470 AbstractCegarLoop]: Abstraction has 37865 states and 58404 transitions. [2021-12-21 14:52:53,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 37865 states and 58404 transitions. [2021-12-21 14:52:53,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:52:53,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:53,272 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] [2021-12-21 14:52:53,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 14:52:53,272 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:53,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash 167927732, now seen corresponding path program 1 times [2021-12-21 14:52:53,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:53,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656197997] [2021-12-21 14:52:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:53,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:52:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:52:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:52:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:53,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656197997] [2021-12-21 14:52:53,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656197997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:53,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:53,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:53,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009990549] [2021-12-21 14:52:53,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:53,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:53,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:53,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:53,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:53,355 INFO L87 Difference]: Start difference. First operand 37865 states and 58404 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)