./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.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 20da2548babe3ea7ba69c8856235b685b3dad9dcce2cbb8d7159e2037477f2fb --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:35:01,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:35:01,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:35:01,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:35:01,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:35:01,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:35:01,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:35:01,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:35:01,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:35:01,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:35:01,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:35:02,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:35:02,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:35:02,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:35:02,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:35:02,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:35:02,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:35:02,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:35:02,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:35:02,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:35:02,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:35:02,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:35:02,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:35:02,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:35:02,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:35:02,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:35:02,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:35:02,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:35:02,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:35:02,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:35:02,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:35:02,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:35:02,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:35:02,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:35:02,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:35:02,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:35:02,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:35:02,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:35:02,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:35:02,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:35:02,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:35:02,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:35:02,075 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:35:02,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:35:02,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:35:02,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:35:02,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:35:02,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:35:02,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:35:02,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:35:02,079 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:35:02,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:35:02,080 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:35:02,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:35:02,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:35:02,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:35:02,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:35:02,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:35:02,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:35:02,081 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:35:02,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:35:02,081 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:35:02,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:35:02,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:35:02,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:35:02,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:35:02,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:35:02,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:35:02,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:35:02,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:35:02,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:35:02,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:35:02,083 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:35:02,084 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:35:02,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:35:02,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20da2548babe3ea7ba69c8856235b685b3dad9dcce2cbb8d7159e2037477f2fb [2021-12-28 02:35:02,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:35:02,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:35:02,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:35:02,422 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:35:02,423 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:35:02,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c [2021-12-28 02:35:02,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9ba47c0/f2012f590f044e29a429d2c048eaba08/FLAG6b3425f09 [2021-12-28 02:35:03,019 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:35:03,020 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c [2021-12-28 02:35:03,038 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9ba47c0/f2012f590f044e29a429d2c048eaba08/FLAG6b3425f09 [2021-12-28 02:35:03,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab9ba47c0/f2012f590f044e29a429d2c048eaba08 [2021-12-28 02:35:03,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:35:03,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:35:03,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:35:03,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:35:03,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:35:03,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:35:03" (1/1) ... [2021-12-28 02:35:03,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c9f197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:03, skipping insertion in model container [2021-12-28 02:35:03,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:35:03" (1/1) ... [2021-12-28 02:35:03,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:35:03,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:35:03,724 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_3.cil+token_ring.09.cil-2.c[911,924] [2021-12-28 02:35:03,846 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_3.cil+token_ring.09.cil-2.c[8416,8429] [2021-12-28 02:35:03,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:35:03,972 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:35:03,984 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_3.cil+token_ring.09.cil-2.c[911,924] [2021-12-28 02:35:04,007 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_3.cil+token_ring.09.cil-2.c[8416,8429] [2021-12-28 02:35:04,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:35:04,089 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:35:04,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04 WrapperNode [2021-12-28 02:35:04,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:35:04,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:35:04,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:35:04,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:35:04,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04" (1/1) ... [2021-12-28 02:35:04,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04" (1/1) ... [2021-12-28 02:35:04,204 INFO L137 Inliner]: procedures = 73, calls = 89, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 909 [2021-12-28 02:35:04,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:35:04,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:35:04,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:35:04,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:35:04,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04" (1/1) ... [2021-12-28 02:35:04,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04" (1/1) ... [2021-12-28 02:35:04,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04" (1/1) ... [2021-12-28 02:35:04,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04" (1/1) ... [2021-12-28 02:35:04,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04" (1/1) ... [2021-12-28 02:35:04,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04" (1/1) ... [2021-12-28 02:35:04,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04" (1/1) ... [2021-12-28 02:35:04,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:35:04,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:35:04,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:35:04,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:35:04,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04" (1/1) ... [2021-12-28 02:35:04,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:35:04,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:35:04,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 02:35:04,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 02:35:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:35:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:35:04,361 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:35:04,361 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-28 02:35:04,362 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-28 02:35:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:35:04,362 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:35:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:35:04,362 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:35:04,362 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-28 02:35:04,363 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-28 02:35:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:35:04,363 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:35:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:35:04,363 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:35:04,363 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-28 02:35:04,363 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-28 02:35:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-28 02:35:04,364 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-28 02:35:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-28 02:35:04,364 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-28 02:35:04,364 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:35:04,364 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:35:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:35:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:35:04,365 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:35:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-28 02:35:04,365 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-28 02:35:04,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:35:04,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:35:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:35:04,366 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:35:04,366 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-28 02:35:04,366 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-28 02:35:04,515 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:35:04,518 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:35:05,150 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-28 02:35:05,151 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-28 02:35:05,216 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:35:05,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:35:05,234 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-12-28 02:35:05,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:35:05 BoogieIcfgContainer [2021-12-28 02:35:05,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:35:05,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:35:05,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:35:05,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:35:05,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:35:03" (1/3) ... [2021-12-28 02:35:05,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257ff0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:35:05, skipping insertion in model container [2021-12-28 02:35:05,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:35:04" (2/3) ... [2021-12-28 02:35:05,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257ff0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:35:05, skipping insertion in model container [2021-12-28 02:35:05,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:35:05" (3/3) ... [2021-12-28 02:35:05,245 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.09.cil-2.c [2021-12-28 02:35:05,249 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:35:05,250 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:35:05,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:35:05,294 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 02:35:05,295 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:35:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 373 states have (on average 1.6300268096514745) internal successors, (608), 381 states have internal predecessors, (608), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-28 02:35:05,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:35:05,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:05,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:05,327 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:05,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:05,331 INFO L85 PathProgramCache]: Analyzing trace with hash 140273204, now seen corresponding path program 1 times [2021-12-28 02:35:05,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:05,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885771912] [2021-12-28 02:35:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:05,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:35:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:35:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:05,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:05,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885771912] [2021-12-28 02:35:05,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885771912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:05,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:05,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:35:05,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537843813] [2021-12-28 02:35:05,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:05,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:35:05,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:05,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:35:05,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:35:05,734 INFO L87 Difference]: Start difference. First operand has 432 states, 373 states have (on average 1.6300268096514745) internal successors, (608), 381 states have internal predecessors, (608), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:35:06,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:06,570 INFO L93 Difference]: Finished difference Result 857 states and 1368 transitions. [2021-12-28 02:35:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 02:35:06,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:35:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:06,586 INFO L225 Difference]: With dead ends: 857 [2021-12-28 02:35:06,586 INFO L226 Difference]: Without dead ends: 439 [2021-12-28 02:35:06,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:35:06,595 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 669 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:06,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 1793 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:35:06,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-28 02:35:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 421. [2021-12-28 02:35:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 365 states have (on average 1.5424657534246575) internal successors, (563), 370 states have internal predecessors, (563), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-28 02:35:06,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 641 transitions. [2021-12-28 02:35:06,662 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 641 transitions. Word has length 65 [2021-12-28 02:35:06,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:06,663 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 641 transitions. [2021-12-28 02:35:06,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:35:06,663 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 641 transitions. [2021-12-28 02:35:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:35:06,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:06,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:06,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:35:06,667 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash 99598454, now seen corresponding path program 1 times [2021-12-28 02:35:06,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:06,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428016983] [2021-12-28 02:35:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:06,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:35:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:35:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:06,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:06,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428016983] [2021-12-28 02:35:06,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428016983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:06,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:06,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:35:06,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605689348] [2021-12-28 02:35:06,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:06,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:35:06,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:06,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:35:06,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:35:06,823 INFO L87 Difference]: Start difference. First operand 421 states and 641 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:35:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:07,775 INFO L93 Difference]: Finished difference Result 676 states and 1010 transitions. [2021-12-28 02:35:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:35:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:35:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:07,780 INFO L225 Difference]: With dead ends: 676 [2021-12-28 02:35:07,780 INFO L226 Difference]: Without dead ends: 572 [2021-12-28 02:35:07,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:35:07,783 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 1098 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:07,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 2143 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:35:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-12-28 02:35:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 533. [2021-12-28 02:35:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 455 states have (on average 1.5142857142857142) internal successors, (689), 462 states have internal predecessors, (689), 54 states have call successors, (54), 22 states have call predecessors, (54), 22 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-12-28 02:35:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 798 transitions. [2021-12-28 02:35:07,821 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 798 transitions. Word has length 65 [2021-12-28 02:35:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:07,822 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 798 transitions. [2021-12-28 02:35:07,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:35:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 798 transitions. [2021-12-28 02:35:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:35:07,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:07,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:07,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:35:07,826 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:07,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:07,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1778487094, now seen corresponding path program 1 times [2021-12-28 02:35:07,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:07,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690983296] [2021-12-28 02:35:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:07,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:07,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:07,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:07,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:07,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:07,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:07,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:35:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:07,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:07,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:35:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:07,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:07,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690983296] [2021-12-28 02:35:07,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690983296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:07,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:07,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:35:07,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486473200] [2021-12-28 02:35:07,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:07,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:35:07,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:07,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:35:07,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:35:07,969 INFO L87 Difference]: Start difference. First operand 533 states and 798 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:35:08,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:08,974 INFO L93 Difference]: Finished difference Result 930 states and 1363 transitions. [2021-12-28 02:35:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:35:08,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:35:08,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:08,979 INFO L225 Difference]: With dead ends: 930 [2021-12-28 02:35:08,980 INFO L226 Difference]: Without dead ends: 721 [2021-12-28 02:35:08,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-28 02:35:08,982 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1553 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 1995 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:08,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1582 Valid, 1995 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:35:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-28 02:35:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 645. [2021-12-28 02:35:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 545 states have (on average 1.4935779816513761) internal successors, (814), 554 states have internal predecessors, (814), 67 states have call successors, (67), 29 states have call predecessors, (67), 31 states have return successors, (76), 65 states have call predecessors, (76), 63 states have call successors, (76) [2021-12-28 02:35:09,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 957 transitions. [2021-12-28 02:35:09,034 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 957 transitions. Word has length 65 [2021-12-28 02:35:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:09,035 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 957 transitions. [2021-12-28 02:35:09,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:35:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 957 transitions. [2021-12-28 02:35:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:35:09,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:09,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:09,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:35:09,039 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash -250099016, now seen corresponding path program 1 times [2021-12-28 02:35:09,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:09,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723351203] [2021-12-28 02:35:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:09,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:35:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:35:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:35:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:09,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:09,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723351203] [2021-12-28 02:35:09,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723351203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:09,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:09,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 02:35:09,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419834317] [2021-12-28 02:35:09,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:09,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:35:09,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:09,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:35:09,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:35:09,167 INFO L87 Difference]: Start difference. First operand 645 states and 957 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-28 02:35:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:10,975 INFO L93 Difference]: Finished difference Result 2191 states and 3154 transitions. [2021-12-28 02:35:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:35:10,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-28 02:35:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:10,985 INFO L225 Difference]: With dead ends: 2191 [2021-12-28 02:35:10,985 INFO L226 Difference]: Without dead ends: 1858 [2021-12-28 02:35:10,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 02:35:10,989 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 3779 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:10,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3801 Valid, 2504 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 1640 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:35:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-12-28 02:35:11,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1698. [2021-12-28 02:35:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1393 states have (on average 1.407035175879397) internal successors, (1960), 1417 states have internal predecessors, (1960), 177 states have call successors, (177), 112 states have call predecessors, (177), 126 states have return successors, (209), 171 states have call predecessors, (209), 173 states have call successors, (209) [2021-12-28 02:35:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2346 transitions. [2021-12-28 02:35:11,075 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2346 transitions. Word has length 65 [2021-12-28 02:35:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:11,075 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 2346 transitions. [2021-12-28 02:35:11,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-28 02:35:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2346 transitions. [2021-12-28 02:35:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:35:11,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:11,077 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:11,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:35:11,078 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:11,078 INFO L85 PathProgramCache]: Analyzing trace with hash -515912993, now seen corresponding path program 1 times [2021-12-28 02:35:11,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:11,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130738328] [2021-12-28 02:35:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:11,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:35:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 02:35:11,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:35:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:11,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:11,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130738328] [2021-12-28 02:35:11,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130738328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:11,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:11,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:35:11,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240749710] [2021-12-28 02:35:11,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:11,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:35:11,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:11,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:35:11,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:35:11,212 INFO L87 Difference]: Start difference. First operand 1698 states and 2346 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:35:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:12,229 INFO L93 Difference]: Finished difference Result 3226 states and 4425 transitions. [2021-12-28 02:35:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:35:12,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 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 66 [2021-12-28 02:35:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:12,239 INFO L225 Difference]: With dead ends: 3226 [2021-12-28 02:35:12,239 INFO L226 Difference]: Without dead ends: 1846 [2021-12-28 02:35:12,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:35:12,246 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 816 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:12,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 2534 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:35:12,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-12-28 02:35:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1738. [2021-12-28 02:35:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1425 states have (on average 1.3936842105263159) internal successors, (1986), 1449 states have internal predecessors, (1986), 177 states have call successors, (177), 112 states have call predecessors, (177), 134 states have return successors, (217), 179 states have call predecessors, (217), 173 states have call successors, (217) [2021-12-28 02:35:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2380 transitions. [2021-12-28 02:35:12,354 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2380 transitions. Word has length 66 [2021-12-28 02:35:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:12,355 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 2380 transitions. [2021-12-28 02:35:12,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:35:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2380 transitions. [2021-12-28 02:35:12,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:35:12,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:12,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:12,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:35:12,358 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1545272291, now seen corresponding path program 1 times [2021-12-28 02:35:12,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:12,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446537376] [2021-12-28 02:35:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:12,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:12,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:12,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:12,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:12,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:12,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:35:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:12,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 02:35:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:12,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:35:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:12,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:12,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446537376] [2021-12-28 02:35:12,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446537376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:12,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:12,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 02:35:12,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032506851] [2021-12-28 02:35:12,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:12,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:35:12,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:12,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:35:12,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:35:12,490 INFO L87 Difference]: Start difference. First operand 1738 states and 2380 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:35:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:14,265 INFO L93 Difference]: Finished difference Result 5310 states and 7254 transitions. [2021-12-28 02:35:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:35:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-28 02:35:14,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:14,277 INFO L225 Difference]: With dead ends: 5310 [2021-12-28 02:35:14,277 INFO L226 Difference]: Without dead ends: 2129 [2021-12-28 02:35:14,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 02:35:14,303 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 3475 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 2385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:14,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3497 Valid, 2906 Invalid, 2385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:35:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2021-12-28 02:35:14,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1949. [2021-12-28 02:35:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1564 states have (on average 1.350383631713555) internal successors, (2112), 1590 states have internal predecessors, (2112), 217 states have call successors, (217), 140 states have call predecessors, (217), 166 states have return successors, (263), 221 states have call predecessors, (263), 213 states have call successors, (263) [2021-12-28 02:35:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2592 transitions. [2021-12-28 02:35:14,390 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2592 transitions. Word has length 66 [2021-12-28 02:35:14,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:14,391 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 2592 transitions. [2021-12-28 02:35:14,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:35:14,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2592 transitions. [2021-12-28 02:35:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 02:35:14,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:14,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:14,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:35:14,398 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:14,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash 428939397, now seen corresponding path program 1 times [2021-12-28 02:35:14,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:14,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678506799] [2021-12-28 02:35:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:14,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:14,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:14,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:14,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:14,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:14,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:35:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:14,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 02:35:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:14,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:35:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:14,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 02:35:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 02:35:14,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:14,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678506799] [2021-12-28 02:35:14,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678506799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:14,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:14,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:35:14,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029000446] [2021-12-28 02:35:14,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:14,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:35:14,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:14,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:35:14,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:35:14,534 INFO L87 Difference]: Start difference. First operand 1949 states and 2592 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:35:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:15,525 INFO L93 Difference]: Finished difference Result 3774 states and 4994 transitions. [2021-12-28 02:35:15,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:35:15,526 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 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 91 [2021-12-28 02:35:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:15,537 INFO L225 Difference]: With dead ends: 3774 [2021-12-28 02:35:15,537 INFO L226 Difference]: Without dead ends: 2143 [2021-12-28 02:35:15,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:35:15,544 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 541 mSDsluCounter, 2157 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 2772 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:15,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 2772 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:35:15,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-12-28 02:35:15,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 2009. [2021-12-28 02:35:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1612 states have (on average 1.336228287841191) internal successors, (2154), 1638 states have internal predecessors, (2154), 217 states have call successors, (217), 140 states have call predecessors, (217), 178 states have return successors, (275), 233 states have call predecessors, (275), 213 states have call successors, (275) [2021-12-28 02:35:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2646 transitions. [2021-12-28 02:35:15,630 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2646 transitions. Word has length 91 [2021-12-28 02:35:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:15,631 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 2646 transitions. [2021-12-28 02:35:15,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:35:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2646 transitions. [2021-12-28 02:35:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 02:35:15,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:15,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:15,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:35:15,634 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:15,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:15,635 INFO L85 PathProgramCache]: Analyzing trace with hash 872840071, now seen corresponding path program 1 times [2021-12-28 02:35:15,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:15,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390782727] [2021-12-28 02:35:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:15,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:35:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 02:35:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:35:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 02:35:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 02:35:15,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:15,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390782727] [2021-12-28 02:35:15,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390782727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:15,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:15,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:15,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934907213] [2021-12-28 02:35:15,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:15,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:15,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:15,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:15,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:15,737 INFO L87 Difference]: Start difference. First operand 2009 states and 2646 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-28 02:35:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:16,316 INFO L93 Difference]: Finished difference Result 5606 states and 7354 transitions. [2021-12-28 02:35:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:35:16,317 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-28 02:35:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:16,335 INFO L225 Difference]: With dead ends: 5606 [2021-12-28 02:35:16,336 INFO L226 Difference]: Without dead ends: 3916 [2021-12-28 02:35:16,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:35:16,343 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 1169 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:16,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1199 Valid, 1848 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:35:16,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2021-12-28 02:35:16,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3696. [2021-12-28 02:35:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 2926 states have (on average 1.2956254272043746) internal successors, (3791), 2986 states have internal predecessors, (3791), 406 states have call successors, (406), 272 states have call predecessors, (406), 362 states have return successors, (607), 442 states have call predecessors, (607), 402 states have call successors, (607) [2021-12-28 02:35:16,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 4804 transitions. [2021-12-28 02:35:16,544 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 4804 transitions. Word has length 91 [2021-12-28 02:35:16,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:16,544 INFO L470 AbstractCegarLoop]: Abstraction has 3696 states and 4804 transitions. [2021-12-28 02:35:16,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-28 02:35:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 4804 transitions. [2021-12-28 02:35:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-28 02:35:16,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:16,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:16,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:35:16,548 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:16,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:16,567 INFO L85 PathProgramCache]: Analyzing trace with hash -184998007, now seen corresponding path program 1 times [2021-12-28 02:35:16,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:16,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872811853] [2021-12-28 02:35:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:16,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:16,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:16,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:16,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:16,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:16,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:35:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:16,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 02:35:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:16,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:35:16,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:16,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-28 02:35:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 02:35:16,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:16,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872811853] [2021-12-28 02:35:16,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872811853] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:16,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:16,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:35:16,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701396839] [2021-12-28 02:35:16,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:16,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:35:16,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:35:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:35:16,658 INFO L87 Difference]: Start difference. First operand 3696 states and 4804 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:35:17,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:17,162 INFO L93 Difference]: Finished difference Result 5504 states and 7072 transitions. [2021-12-28 02:35:17,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 02:35:17,163 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), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-28 02:35:17,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:17,174 INFO L225 Difference]: With dead ends: 5504 [2021-12-28 02:35:17,174 INFO L226 Difference]: Without dead ends: 2127 [2021-12-28 02:35:17,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:35:17,184 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 657 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:17,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 1709 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:35:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-12-28 02:35:17,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2009. [2021-12-28 02:35:17,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1612 states have (on average 1.3095533498759304) internal successors, (2111), 1638 states have internal predecessors, (2111), 217 states have call successors, (217), 140 states have call predecessors, (217), 178 states have return successors, (275), 233 states have call predecessors, (275), 213 states have call successors, (275) [2021-12-28 02:35:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2603 transitions. [2021-12-28 02:35:17,309 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2603 transitions. Word has length 91 [2021-12-28 02:35:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:17,309 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 2603 transitions. [2021-12-28 02:35:17,311 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), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:35:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2603 transitions. [2021-12-28 02:35:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 02:35:17,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:17,313 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:17,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:35:17,313 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:17,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash -828087601, now seen corresponding path program 1 times [2021-12-28 02:35:17,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:17,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679708620] [2021-12-28 02:35:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:17,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:35:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:35:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:35:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 02:35:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 02:35:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:35:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-28 02:35:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:35:17,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:17,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679708620] [2021-12-28 02:35:17,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679708620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:17,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:17,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:35:17,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20982384] [2021-12-28 02:35:17,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:17,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:35:17,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:35:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:35:17,433 INFO L87 Difference]: Start difference. First operand 2009 states and 2603 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:35:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:18,603 INFO L93 Difference]: Finished difference Result 4665 states and 5993 transitions. [2021-12-28 02:35:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-28 02:35:18,603 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 92 [2021-12-28 02:35:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:18,618 INFO L225 Difference]: With dead ends: 4665 [2021-12-28 02:35:18,618 INFO L226 Difference]: Without dead ends: 2823 [2021-12-28 02:35:18,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-28 02:35:18,625 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 2620 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2662 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:18,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2662 Valid, 1988 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:35:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-12-28 02:35:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2646. [2021-12-28 02:35:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2090 states have (on average 1.2708133971291866) internal successors, (2656), 2125 states have internal predecessors, (2656), 296 states have call successors, (296), 189 states have call predecessors, (296), 258 states have return successors, (411), 334 states have call predecessors, (411), 292 states have call successors, (411) [2021-12-28 02:35:18,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3363 transitions. [2021-12-28 02:35:18,767 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3363 transitions. Word has length 92 [2021-12-28 02:35:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:18,767 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 3363 transitions. [2021-12-28 02:35:18,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:35:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3363 transitions. [2021-12-28 02:35:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 02:35:18,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:18,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:18,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:35:18,772 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:18,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:18,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1167702267, now seen corresponding path program 1 times [2021-12-28 02:35:18,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:18,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280580102] [2021-12-28 02:35:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:18,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:18,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:18,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 02:35:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:18,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:35:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:18,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:35:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:18,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 02:35:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:18,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:18,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280580102] [2021-12-28 02:35:18,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280580102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:18,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:18,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:35:18,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638278682] [2021-12-28 02:35:18,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:18,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:35:18,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:18,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:35:18,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:35:18,884 INFO L87 Difference]: Start difference. First operand 2646 states and 3363 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-12-28 02:35:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:20,197 INFO L93 Difference]: Finished difference Result 3051 states and 4013 transitions. [2021-12-28 02:35:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:35:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 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 146 [2021-12-28 02:35:20,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:20,212 INFO L225 Difference]: With dead ends: 3051 [2021-12-28 02:35:20,213 INFO L226 Difference]: Without dead ends: 2755 [2021-12-28 02:35:20,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:35:20,217 INFO L933 BasicCegarLoop]: 673 mSDtfsCounter, 922 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:20,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 1196 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:35:20,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-12-28 02:35:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2646. [2021-12-28 02:35:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2090 states have (on average 1.270334928229665) internal successors, (2655), 2125 states have internal predecessors, (2655), 296 states have call successors, (296), 189 states have call predecessors, (296), 258 states have return successors, (411), 334 states have call predecessors, (411), 292 states have call successors, (411) [2021-12-28 02:35:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3362 transitions. [2021-12-28 02:35:20,423 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3362 transitions. Word has length 146 [2021-12-28 02:35:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:20,423 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 3362 transitions. [2021-12-28 02:35:20,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2021-12-28 02:35:20,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3362 transitions. [2021-12-28 02:35:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 02:35:20,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:20,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:20,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:35:20,428 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:20,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1712574841, now seen corresponding path program 1 times [2021-12-28 02:35:20,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:20,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001037813] [2021-12-28 02:35:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:20,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:20,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:20,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 02:35:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:20,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:35:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:20,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:35:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:20,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 02:35:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:20,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:20,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:20,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001037813] [2021-12-28 02:35:20,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001037813] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:20,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:20,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:35:20,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595688510] [2021-12-28 02:35:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:20,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:35:20,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:35:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:35:20,554 INFO L87 Difference]: Start difference. First operand 2646 states and 3362 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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) [2021-12-28 02:35:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:22,757 INFO L93 Difference]: Finished difference Result 3460 states and 4673 transitions. [2021-12-28 02:35:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:35:22,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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 146 [2021-12-28 02:35:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:22,770 INFO L225 Difference]: With dead ends: 3460 [2021-12-28 02:35:22,770 INFO L226 Difference]: Without dead ends: 3168 [2021-12-28 02:35:22,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:35:22,773 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1462 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:22,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1792 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-28 02:35:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-12-28 02:35:22,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2949. [2021-12-28 02:35:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2368 states have (on average 1.308277027027027) internal successors, (3098), 2404 states have internal predecessors, (3098), 314 states have call successors, (314), 195 states have call predecessors, (314), 265 states have return successors, (432), 352 states have call predecessors, (432), 310 states have call successors, (432) [2021-12-28 02:35:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3844 transitions. [2021-12-28 02:35:22,944 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3844 transitions. Word has length 146 [2021-12-28 02:35:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:22,945 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 3844 transitions. [2021-12-28 02:35:22,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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) [2021-12-28 02:35:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3844 transitions. [2021-12-28 02:35:22,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 02:35:22,948 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:22,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:22,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:35:22,949 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:22,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:22,950 INFO L85 PathProgramCache]: Analyzing trace with hash -88890763, now seen corresponding path program 1 times [2021-12-28 02:35:22,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:22,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784079061] [2021-12-28 02:35:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:22,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:22,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:23,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 02:35:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:23,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:35:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:23,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:35:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:23,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 02:35:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:23,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:23,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:23,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784079061] [2021-12-28 02:35:23,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784079061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:23,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:23,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:23,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741655196] [2021-12-28 02:35:23,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:23,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:23,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:23,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:23,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:23,111 INFO L87 Difference]: Start difference. First operand 2949 states and 3844 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:25,684 INFO L93 Difference]: Finished difference Result 4188 states and 5840 transitions. [2021-12-28 02:35:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:35:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-28 02:35:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:25,700 INFO L225 Difference]: With dead ends: 4188 [2021-12-28 02:35:25,700 INFO L226 Difference]: Without dead ends: 3593 [2021-12-28 02:35:25,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:35:25,704 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 1477 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 2759 SdHoareTripleChecker+Invalid, 2785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:25,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 2759 Invalid, 2785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2672 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-28 02:35:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-12-28 02:35:25,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3231. [2021-12-28 02:35:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 2625 states have (on average 1.3329523809523809) internal successors, (3499), 2662 states have internal predecessors, (3499), 332 states have call successors, (332), 201 states have call predecessors, (332), 272 states have return successors, (452), 371 states have call predecessors, (452), 328 states have call successors, (452) [2021-12-28 02:35:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 4283 transitions. [2021-12-28 02:35:25,901 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 4283 transitions. Word has length 146 [2021-12-28 02:35:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:25,901 INFO L470 AbstractCegarLoop]: Abstraction has 3231 states and 4283 transitions. [2021-12-28 02:35:25,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 4283 transitions. [2021-12-28 02:35:25,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 02:35:25,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:25,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:25,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:35:25,905 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash -795487369, now seen corresponding path program 1 times [2021-12-28 02:35:25,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:25,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38192109] [2021-12-28 02:35:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:25,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:25,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:25,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 02:35:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:26,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:35:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:26,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:35:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:26,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 02:35:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:26,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:26,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38192109] [2021-12-28 02:35:26,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38192109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:26,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:26,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:26,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907168073] [2021-12-28 02:35:26,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:26,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:26,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:26,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:26,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:26,038 INFO L87 Difference]: Start difference. First operand 3231 states and 4283 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:28,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:28,721 INFO L93 Difference]: Finished difference Result 5261 states and 7547 transitions. [2021-12-28 02:35:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:35:28,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-28 02:35:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:28,739 INFO L225 Difference]: With dead ends: 5261 [2021-12-28 02:35:28,740 INFO L226 Difference]: Without dead ends: 4384 [2021-12-28 02:35:28,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:35:28,745 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 1474 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 2674 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 2751 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:28,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 2751 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2674 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-28 02:35:28,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2021-12-28 02:35:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 3796. [2021-12-28 02:35:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3140 states have (on average 1.370063694267516) internal successors, (4302), 3179 states have internal predecessors, (4302), 368 states have call successors, (368), 213 states have call predecessors, (368), 286 states have return successors, (496), 409 states have call predecessors, (496), 364 states have call successors, (496) [2021-12-28 02:35:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 5166 transitions. [2021-12-28 02:35:29,026 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 5166 transitions. Word has length 146 [2021-12-28 02:35:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:29,027 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 5166 transitions. [2021-12-28 02:35:29,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 5166 transitions. [2021-12-28 02:35:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 02:35:29,031 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:29,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:29,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:35:29,031 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:29,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash 151550517, now seen corresponding path program 1 times [2021-12-28 02:35:29,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:29,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732841877] [2021-12-28 02:35:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:29,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:29,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:29,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 02:35:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:29,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:35:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:29,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:35:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:29,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 02:35:29,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:29,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:29,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732841877] [2021-12-28 02:35:29,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732841877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:29,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:29,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:29,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100345885] [2021-12-28 02:35:29,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:29,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:29,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:29,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:29,163 INFO L87 Difference]: Start difference. First operand 3796 states and 5166 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:31,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:31,727 INFO L93 Difference]: Finished difference Result 7326 states and 10814 transitions. [2021-12-28 02:35:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:35:31,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-28 02:35:31,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:31,754 INFO L225 Difference]: With dead ends: 7326 [2021-12-28 02:35:31,755 INFO L226 Difference]: Without dead ends: 5884 [2021-12-28 02:35:31,763 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 [2021-12-28 02:35:31,763 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 1470 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 2785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:31,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 2747 Invalid, 2785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2669 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-28 02:35:31,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5884 states. [2021-12-28 02:35:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5884 to 4927. [2021-12-28 02:35:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4927 states, 4171 states have (on average 1.416446895228962) internal successors, (5908), 4214 states have internal predecessors, (5908), 440 states have call successors, (440), 237 states have call predecessors, (440), 314 states have return successors, (590), 485 states have call predecessors, (590), 436 states have call successors, (590) [2021-12-28 02:35:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 6938 transitions. [2021-12-28 02:35:32,129 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 6938 transitions. Word has length 146 [2021-12-28 02:35:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:32,130 INFO L470 AbstractCegarLoop]: Abstraction has 4927 states and 6938 transitions. [2021-12-28 02:35:32,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 6938 transitions. [2021-12-28 02:35:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 02:35:32,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:32,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:32,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:35:32,135 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:32,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:32,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1013384119, now seen corresponding path program 1 times [2021-12-28 02:35:32,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:32,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332008594] [2021-12-28 02:35:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:32,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:32,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:32,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 02:35:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:32,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:35:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:32,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:35:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:32,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 02:35:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:32,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:32,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:32,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332008594] [2021-12-28 02:35:32,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332008594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:32,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:32,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:32,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233471089] [2021-12-28 02:35:32,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:32,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:32,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:32,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:32,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:32,258 INFO L87 Difference]: Start difference. First operand 4927 states and 6938 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:35,080 INFO L93 Difference]: Finished difference Result 11455 states and 17364 transitions. [2021-12-28 02:35:35,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:35:35,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-28 02:35:35,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:35,108 INFO L225 Difference]: With dead ends: 11455 [2021-12-28 02:35:35,108 INFO L226 Difference]: Without dead ends: 8882 [2021-12-28 02:35:35,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:35:35,120 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 1466 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 2664 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 2780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:35,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 2743 Invalid, 2780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2664 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-28 02:35:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8882 states. [2021-12-28 02:35:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8882 to 7194. [2021-12-28 02:35:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 6238 states have (on average 1.462968900288554) internal successors, (9126), 6289 states have internal predecessors, (9126), 584 states have call successors, (584), 285 states have call predecessors, (584), 370 states have return successors, (796), 637 states have call predecessors, (796), 580 states have call successors, (796) [2021-12-28 02:35:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 10506 transitions. [2021-12-28 02:35:35,677 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 10506 transitions. Word has length 146 [2021-12-28 02:35:35,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:35,678 INFO L470 AbstractCegarLoop]: Abstraction has 7194 states and 10506 transitions. [2021-12-28 02:35:35,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:35,678 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 10506 transitions. [2021-12-28 02:35:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 02:35:35,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:35,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:35,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:35:35,691 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:35,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1037024779, now seen corresponding path program 1 times [2021-12-28 02:35:35,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:35,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370127076] [2021-12-28 02:35:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:35,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 02:35:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:35:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:35:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 02:35:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:35,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:35,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370127076] [2021-12-28 02:35:35,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370127076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:35,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:35,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:35,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83036048] [2021-12-28 02:35:35,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:35,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:35,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:35,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:35,829 INFO L87 Difference]: Start difference. First operand 7194 states and 10506 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:37,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:37,813 INFO L93 Difference]: Finished difference Result 13798 states and 21153 transitions. [2021-12-28 02:35:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:35:37,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-28 02:35:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:37,842 INFO L225 Difference]: With dead ends: 13798 [2021-12-28 02:35:37,843 INFO L226 Difference]: Without dead ends: 8958 [2021-12-28 02:35:37,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:35:37,859 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 1127 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:37,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 1653 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:35:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8958 states. [2021-12-28 02:35:38,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8958 to 7194. [2021-12-28 02:35:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 6238 states have (on average 1.4602436678422572) internal successors, (9109), 6289 states have internal predecessors, (9109), 584 states have call successors, (584), 285 states have call predecessors, (584), 370 states have return successors, (796), 637 states have call predecessors, (796), 580 states have call successors, (796) [2021-12-28 02:35:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 10489 transitions. [2021-12-28 02:35:38,355 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 10489 transitions. Word has length 146 [2021-12-28 02:35:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:38,355 INFO L470 AbstractCegarLoop]: Abstraction has 7194 states and 10489 transitions. [2021-12-28 02:35:38,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 10489 transitions. [2021-12-28 02:35:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 02:35:38,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:38,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:38,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:35:38,361 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:38,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:38,362 INFO L85 PathProgramCache]: Analyzing trace with hash -548977673, now seen corresponding path program 1 times [2021-12-28 02:35:38,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:38,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187496133] [2021-12-28 02:35:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:38,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:38,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:38,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 02:35:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:38,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:35:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:38,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:35:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:38,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 02:35:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:38,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:38,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187496133] [2021-12-28 02:35:38,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187496133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:38,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:38,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:38,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027395036] [2021-12-28 02:35:38,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:38,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:38,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:38,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:38,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:38,493 INFO L87 Difference]: Start difference. First operand 7194 states and 10489 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:40,238 INFO L93 Difference]: Finished difference Result 13780 states and 21067 transitions. [2021-12-28 02:35:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:35:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-28 02:35:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:40,270 INFO L225 Difference]: With dead ends: 13780 [2021-12-28 02:35:40,270 INFO L226 Difference]: Without dead ends: 8940 [2021-12-28 02:35:40,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:35:40,288 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 1314 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:40,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 1423 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:35:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8940 states. [2021-12-28 02:35:40,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8940 to 7194. [2021-12-28 02:35:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7194 states, 6238 states have (on average 1.4575184353959603) internal successors, (9092), 6289 states have internal predecessors, (9092), 584 states have call successors, (584), 285 states have call predecessors, (584), 370 states have return successors, (796), 637 states have call predecessors, (796), 580 states have call successors, (796) [2021-12-28 02:35:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7194 states to 7194 states and 10472 transitions. [2021-12-28 02:35:40,851 INFO L78 Accepts]: Start accepts. Automaton has 7194 states and 10472 transitions. Word has length 146 [2021-12-28 02:35:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:40,851 INFO L470 AbstractCegarLoop]: Abstraction has 7194 states and 10472 transitions. [2021-12-28 02:35:40,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:40,852 INFO L276 IsEmpty]: Start isEmpty. Operand 7194 states and 10472 transitions. [2021-12-28 02:35:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 02:35:40,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:40,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:40,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:35:40,859 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:40,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:40,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1641612875, now seen corresponding path program 1 times [2021-12-28 02:35:40,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:40,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325113715] [2021-12-28 02:35:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:40,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:40,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:40,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 02:35:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:40,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:35:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:40,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:35:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:40,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 02:35:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:40,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:40,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325113715] [2021-12-28 02:35:40,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325113715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:40,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:40,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:40,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992785208] [2021-12-28 02:35:40,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:40,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:40,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:40,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:40,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:40,988 INFO L87 Difference]: Start difference. First operand 7194 states and 10472 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:43,958 INFO L93 Difference]: Finished difference Result 19657 states and 30250 transitions. [2021-12-28 02:35:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:35:43,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-28 02:35:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:43,999 INFO L225 Difference]: With dead ends: 19657 [2021-12-28 02:35:44,000 INFO L226 Difference]: Without dead ends: 14817 [2021-12-28 02:35:44,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:35:44,016 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 1448 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 2721 SdHoareTripleChecker+Invalid, 2725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:44,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 2721 Invalid, 2725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2605 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-28 02:35:44,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14817 states. [2021-12-28 02:35:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14817 to 11790. [2021-12-28 02:35:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11790 states, 10434 states have (on average 1.493387004025302) internal successors, (15582), 10501 states have internal predecessors, (15582), 872 states have call successors, (872), 381 states have call predecessors, (872), 482 states have return successors, (1262), 941 states have call predecessors, (1262), 868 states have call successors, (1262) [2021-12-28 02:35:44,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11790 states to 11790 states and 17716 transitions. [2021-12-28 02:35:44,874 INFO L78 Accepts]: Start accepts. Automaton has 11790 states and 17716 transitions. Word has length 146 [2021-12-28 02:35:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:44,875 INFO L470 AbstractCegarLoop]: Abstraction has 11790 states and 17716 transitions. [2021-12-28 02:35:44,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 11790 states and 17716 transitions. [2021-12-28 02:35:44,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 02:35:44,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:44,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:44,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:35:44,884 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:44,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:44,886 INFO L85 PathProgramCache]: Analyzing trace with hash 810878707, now seen corresponding path program 1 times [2021-12-28 02:35:44,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:44,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846372639] [2021-12-28 02:35:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:44,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:44,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:44,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 02:35:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:44,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:35:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:44,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:35:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:44,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 02:35:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:45,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:45,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846372639] [2021-12-28 02:35:45,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846372639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:45,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:45,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:45,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763856730] [2021-12-28 02:35:45,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:45,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:45,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:45,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:45,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:45,004 INFO L87 Difference]: Start difference. First operand 11790 states and 17716 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:47,114 INFO L93 Difference]: Finished difference Result 24390 states and 37975 transitions. [2021-12-28 02:35:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:35:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-28 02:35:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:47,160 INFO L225 Difference]: With dead ends: 24390 [2021-12-28 02:35:47,161 INFO L226 Difference]: Without dead ends: 14954 [2021-12-28 02:35:47,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:35:47,184 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 1125 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:47,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 1638 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:35:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14954 states. [2021-12-28 02:35:47,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14954 to 11790. [2021-12-28 02:35:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11790 states, 10434 states have (on average 1.4902242668200114) internal successors, (15549), 10501 states have internal predecessors, (15549), 872 states have call successors, (872), 381 states have call predecessors, (872), 482 states have return successors, (1262), 941 states have call predecessors, (1262), 868 states have call successors, (1262) [2021-12-28 02:35:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11790 states to 11790 states and 17683 transitions. [2021-12-28 02:35:48,021 INFO L78 Accepts]: Start accepts. Automaton has 11790 states and 17683 transitions. Word has length 146 [2021-12-28 02:35:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:35:48,021 INFO L470 AbstractCegarLoop]: Abstraction has 11790 states and 17683 transitions. [2021-12-28 02:35:48,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 11790 states and 17683 transitions. [2021-12-28 02:35:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-28 02:35:48,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:35:48,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:35:48,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:35:48,030 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:35:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:35:48,030 INFO L85 PathProgramCache]: Analyzing trace with hash -911123979, now seen corresponding path program 1 times [2021-12-28 02:35:48,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:35:48,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814614276] [2021-12-28 02:35:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:35:48,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:35:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:48,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:35:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:48,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 02:35:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:48,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-28 02:35:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:48,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:35:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:48,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-28 02:35:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:35:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:35:48,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:35:48,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814614276] [2021-12-28 02:35:48,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814614276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:35:48,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:35:48,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:35:48,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714845939] [2021-12-28 02:35:48,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:35:48,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:35:48,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:35:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:35:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:35:48,145 INFO L87 Difference]: Start difference. First operand 11790 states and 17683 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-28 02:35:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:35:53,314 INFO L93 Difference]: Finished difference Result 40457 states and 62934 transitions. [2021-12-28 02:35:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:35:53,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-28 02:35:53,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:35:53,405 INFO L225 Difference]: With dead ends: 40457 [2021-12-28 02:35:53,405 INFO L226 Difference]: Without dead ends: 31021 [2021-12-28 02:35:53,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:35:53,436 INFO L933 BasicCegarLoop]: 1049 mSDtfsCounter, 1533 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 3012 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 2852 SdHoareTripleChecker+Invalid, 3134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 3012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:35:53,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 2852 Invalid, 3134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 3012 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-28 02:35:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31021 states.