./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:06:34,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:06:34,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:06:34,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:06:34,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:06:34,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:06:34,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:06:34,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:06:34,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:06:34,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:06:34,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:06:34,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:06:34,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:06:34,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:06:34,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:06:34,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:06:34,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:06:34,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:06:34,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:06:34,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:06:34,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:06:34,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:06:34,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:06:34,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:06:34,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:06:34,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:06:34,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:06:34,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:06:34,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:06:34,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:06:34,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:06:34,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:06:34,279 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:06:34,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:06:34,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:06:34,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:06:34,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:06:34,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:06:34,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:06:34,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:06:34,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:06:34,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:06:34,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:06:34,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:06:34,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:06:34,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:06:34,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:06:34,313 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:06:34,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:06:34,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:06:34,314 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:06:34,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:06:34,315 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:06:34,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:06:34,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:06:34,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:06:34,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:06:34,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:06:34,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:06:34,316 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:06:34,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:06:34,317 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:06:34,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:06:34,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:06:34,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:06:34,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:06:34,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:06:34,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:06:34,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:06:34,318 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:06:34,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:06:34,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:06:34,318 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:06:34,318 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:06:34,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:06:34,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:06:34,319 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce176716d91d866602a372020396224af9fcf4c5f81c6adcdcc0f1d83b0d658f [2021-12-17 21:06:34,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:06:34,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:06:34,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:06:34,566 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:06:34,567 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:06:34,568 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-12-17 21:06:34,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8336cebbe/f493844cdd5f4bc39f7a34fd64980629/FLAG3b76b6056 [2021-12-17 21:06:35,023 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:06:35,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-12-17 21:06:35,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8336cebbe/f493844cdd5f4bc39f7a34fd64980629/FLAG3b76b6056 [2021-12-17 21:06:35,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8336cebbe/f493844cdd5f4bc39f7a34fd64980629 [2021-12-17 21:06:35,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:06:35,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:06:35,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:06:35,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:06:35,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:06:35,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:35,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f9e0ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35, skipping insertion in model container [2021-12-17 21:06:35,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:35,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:06:35,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:06:35,622 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2021-12-17 21:06:35,689 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2021-12-17 21:06:35,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:06:35,791 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:06:35,800 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[914,927] [2021-12-17 21:06:35,811 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.13.cil-1.c[7115,7128] [2021-12-17 21:06:35,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:06:35,882 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:06:35,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35 WrapperNode [2021-12-17 21:06:35,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:06:35,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:06:35,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:06:35,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:06:35,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:35,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:35,942 INFO L137 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1103 [2021-12-17 21:06:35,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:06:35,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:06:35,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:06:35,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:06:35,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:35,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:35,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:35,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:35,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:35,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:36,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:36,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:06:36,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:06:36,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:06:36,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:06:36,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35" (1/1) ... [2021-12-17 21:06:36,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:06:36,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:06:36,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 21:06:36,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 21:06:36,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:06:36,099 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:06:36,099 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:06:36,099 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-17 21:06:36,100 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-17 21:06:36,100 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:06:36,100 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:06:36,101 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:06:36,101 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:06:36,101 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-17 21:06:36,101 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-17 21:06:36,101 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:06:36,101 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:06:36,101 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:06:36,101 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:06:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-17 21:06:36,102 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-17 21:06:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-17 21:06:36,102 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-17 21:06:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-17 21:06:36,102 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-17 21:06:36,102 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:06:36,102 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:06:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:06:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:06:36,103 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:06:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-17 21:06:36,103 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-17 21:06:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:06:36,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:06:36,103 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:06:36,103 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:06:36,104 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-17 21:06:36,104 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-17 21:06:36,223 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:06:36,228 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:06:36,842 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:06:36,850 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:06:36,851 INFO L301 CfgBuilder]: Removed 20 assume(true) statements. [2021-12-17 21:06:36,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:06:36 BoogieIcfgContainer [2021-12-17 21:06:36,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:06:36,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:06:36,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:06:36,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:06:36,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:06:35" (1/3) ... [2021-12-17 21:06:36,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730bd745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:06:36, skipping insertion in model container [2021-12-17 21:06:36,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:06:35" (2/3) ... [2021-12-17 21:06:36,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730bd745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:06:36, skipping insertion in model container [2021-12-17 21:06:36,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:06:36" (3/3) ... [2021-12-17 21:06:36,858 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.13.cil-1.c [2021-12-17 21:06:36,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:06:36,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:06:36,896 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:06:36,900 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:06:36,901 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:06:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 516 states, 455 states have (on average 1.6483516483516483) internal successors, (750), 463 states have internal predecessors, (750), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-12-17 21:06:36,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:06:36,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:36,950 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] [2021-12-17 21:06:36,951 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1743097905, now seen corresponding path program 1 times [2021-12-17 21:06:36,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:36,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287480778] [2021-12-17 21:06:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:36,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:37,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:37,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:37,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:37,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:37,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:37,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:37,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:37,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287480778] [2021-12-17 21:06:37,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287480778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:37,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:37,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:06:37,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650203819] [2021-12-17 21:06:37,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:37,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:06:37,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:37,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:06:37,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:06:37,336 INFO L87 Difference]: Start difference. First operand has 516 states, 455 states have (on average 1.6483516483516483) internal successors, (750), 463 states have internal predecessors, (750), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) 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) [2021-12-17 21:06:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:38,359 INFO L93 Difference]: Finished difference Result 1137 states and 1828 transitions. [2021-12-17 21:06:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:06:38,361 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 [2021-12-17 21:06:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:38,372 INFO L225 Difference]: With dead ends: 1137 [2021-12-17 21:06:38,372 INFO L226 Difference]: Without dead ends: 640 [2021-12-17 21:06:38,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:06:38,382 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 1258 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:38,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1263 Valid, 2332 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:06:38,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-12-17 21:06:38,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 601. [2021-12-17 21:06:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 523 states have (on average 1.5353728489483747) internal successors, (803), 530 states have internal predecessors, (803), 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) [2021-12-17 21:06:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 912 transitions. [2021-12-17 21:06:38,471 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 912 transitions. Word has length 65 [2021-12-17 21:06:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:38,472 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 912 transitions. [2021-12-17 21:06:38,472 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) [2021-12-17 21:06:38,472 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 912 transitions. [2021-12-17 21:06:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:06:38,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:38,475 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] [2021-12-17 21:06:38,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:06:38,475 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2146883856, now seen corresponding path program 1 times [2021-12-17 21:06:38,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:38,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081547117] [2021-12-17 21:06:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:38,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:38,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:38,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:38,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:38,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:38,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:38,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:38,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:38,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081547117] [2021-12-17 21:06:38,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081547117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:38,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:38,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:06:38,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654171766] [2021-12-17 21:06:38,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:38,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:06:38,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:38,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:06:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:06:38,620 INFO L87 Difference]: Start difference. First operand 601 states and 912 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:06:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:39,591 INFO L93 Difference]: Finished difference Result 815 states and 1206 transitions. [2021-12-17 21:06:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:06:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-17 21:06:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:39,596 INFO L225 Difference]: With dead ends: 815 [2021-12-17 21:06:39,596 INFO L226 Difference]: Without dead ends: 638 [2021-12-17 21:06:39,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:06:39,598 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 692 mSDsluCounter, 2836 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 3604 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:39,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 3604 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:06:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-12-17 21:06:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 606. [2021-12-17 21:06:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 527 states have (on average 1.5294117647058822) internal successors, (806), 534 states have internal predecessors, (806), 54 states have call successors, (54), 22 states have call predecessors, (54), 23 states have return successors, (56), 52 states have call predecessors, (56), 50 states have call successors, (56) [2021-12-17 21:06:39,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 916 transitions. [2021-12-17 21:06:39,636 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 916 transitions. Word has length 65 [2021-12-17 21:06:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:39,636 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 916 transitions. [2021-12-17 21:06:39,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:06:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 916 transitions. [2021-12-17 21:06:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:06:39,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:39,642 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] [2021-12-17 21:06:39,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:06:39,643 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1117524558, now seen corresponding path program 1 times [2021-12-17 21:06:39,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:39,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494733257] [2021-12-17 21:06:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:39,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:39,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:39,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:39,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:39,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:39,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:39,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:39,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:39,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:39,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:39,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494733257] [2021-12-17 21:06:39,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494733257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:39,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:39,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:06:39,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260334422] [2021-12-17 21:06:39,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:39,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:06:39,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:39,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:06:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:06:39,778 INFO L87 Difference]: Start difference. First operand 606 states and 916 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-17 21:06:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:41,303 INFO L93 Difference]: Finished difference Result 1506 states and 2135 transitions. [2021-12-17 21:06:41,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 21:06:41,303 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-17 21:06:41,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:41,308 INFO L225 Difference]: With dead ends: 1506 [2021-12-17 21:06:41,309 INFO L226 Difference]: Without dead ends: 1312 [2021-12-17 21:06:41,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 21:06:41,311 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 3815 mSDsluCounter, 2339 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3831 SdHoareTripleChecker+Valid, 3217 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:41,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3831 Valid, 3217 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:06:41,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-12-17 21:06:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1187. [2021-12-17 21:06:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 989 states have (on average 1.435793731041456) internal successors, (1420), 1004 states have internal predecessors, (1420), 111 states have call successors, (111), 75 states have call predecessors, (111), 85 states have return successors, (125), 109 states have call predecessors, (125), 107 states have call successors, (125) [2021-12-17 21:06:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1656 transitions. [2021-12-17 21:06:41,372 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1656 transitions. Word has length 65 [2021-12-17 21:06:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:41,373 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 1656 transitions. [2021-12-17 21:06:41,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-17 21:06:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1656 transitions. [2021-12-17 21:06:41,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:06:41,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:41,375 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] [2021-12-17 21:06:41,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:06:41,376 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:41,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2125993649, now seen corresponding path program 1 times [2021-12-17 21:06:41,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:41,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475099018] [2021-12-17 21:06:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:41,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:41,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:41,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:41,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:41,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:41,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:41,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:41,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:41,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:41,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475099018] [2021-12-17 21:06:41,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475099018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:41,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:41,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:06:41,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258045188] [2021-12-17 21:06:41,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:41,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:06:41,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:41,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:06:41,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:06:41,511 INFO L87 Difference]: Start difference. First operand 1187 states and 1656 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:06:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:42,454 INFO L93 Difference]: Finished difference Result 2068 states and 2799 transitions. [2021-12-17 21:06:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:06:42,455 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-17 21:06:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:42,459 INFO L225 Difference]: With dead ends: 2068 [2021-12-17 21:06:42,460 INFO L226 Difference]: Without dead ends: 1299 [2021-12-17 21:06:42,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:06:42,467 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1032 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:42,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 3228 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:06:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-12-17 21:06:42,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1207. [2021-12-17 21:06:42,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1005 states have (on average 1.4238805970149253) internal successors, (1431), 1020 states have internal predecessors, (1431), 111 states have call successors, (111), 75 states have call predecessors, (111), 89 states have return successors, (129), 113 states have call predecessors, (129), 107 states have call successors, (129) [2021-12-17 21:06:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1671 transitions. [2021-12-17 21:06:42,507 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1671 transitions. Word has length 65 [2021-12-17 21:06:42,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:42,507 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 1671 transitions. [2021-12-17 21:06:42,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:06:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1671 transitions. [2021-12-17 21:06:42,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:06:42,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:42,509 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] [2021-12-17 21:06:42,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:06:42,509 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:42,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:42,509 INFO L85 PathProgramCache]: Analyzing trace with hash -739790255, now seen corresponding path program 1 times [2021-12-17 21:06:42,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:42,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936108480] [2021-12-17 21:06:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:42,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:42,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:42,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:42,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936108480] [2021-12-17 21:06:42,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936108480] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:42,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:42,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:06:42,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300121945] [2021-12-17 21:06:42,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:42,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:06:42,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:06:42,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:06:42,609 INFO L87 Difference]: Start difference. First operand 1207 states and 1671 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) [2021-12-17 21:06:43,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:43,404 INFO L93 Difference]: Finished difference Result 2775 states and 3618 transitions. [2021-12-17 21:06:43,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:06:43,405 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 [2021-12-17 21:06:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:43,412 INFO L225 Difference]: With dead ends: 2775 [2021-12-17 21:06:43,412 INFO L226 Difference]: Without dead ends: 1987 [2021-12-17 21:06:43,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:06:43,415 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1899 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1929 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:43,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1929 Valid, 2300 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:06:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-12-17 21:06:43,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1655. [2021-12-17 21:06:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1358 states have (on average 1.3843888070692194) internal successors, (1880), 1382 states have internal predecessors, (1880), 157 states have call successors, (157), 114 states have call predecessors, (157), 138 states have return successors, (201), 161 states have call predecessors, (201), 153 states have call successors, (201) [2021-12-17 21:06:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2238 transitions. [2021-12-17 21:06:43,489 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2238 transitions. Word has length 65 [2021-12-17 21:06:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:43,489 INFO L470 AbstractCegarLoop]: Abstraction has 1655 states and 2238 transitions. [2021-12-17 21:06:43,490 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) [2021-12-17 21:06:43,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2238 transitions. [2021-12-17 21:06:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:06:43,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:43,491 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] [2021-12-17 21:06:43,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:06:43,491 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:43,492 INFO L85 PathProgramCache]: Analyzing trace with hash -873803761, now seen corresponding path program 1 times [2021-12-17 21:06:43,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:43,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370467617] [2021-12-17 21:06:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:43,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:43,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:43,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:43,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:43,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:43,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:43,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:43,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:43,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370467617] [2021-12-17 21:06:43,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370467617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:43,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:43,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:43,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201304582] [2021-12-17 21:06:43,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:43,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:43,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:43,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:43,583 INFO L87 Difference]: Start difference. First operand 1655 states and 2238 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:06:43,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:43,975 INFO L93 Difference]: Finished difference Result 4133 states and 5392 transitions. [2021-12-17 21:06:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:06:43,976 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-17 21:06:43,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:43,987 INFO L225 Difference]: With dead ends: 4133 [2021-12-17 21:06:43,987 INFO L226 Difference]: Without dead ends: 2899 [2021-12-17 21:06:43,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-17 21:06:43,991 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1872 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 1860 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:43,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1906 Valid, 1860 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:06:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-12-17 21:06:44,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2791. [2021-12-17 21:06:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2229 states have (on average 1.316733961417676) internal successors, (2935), 2275 states have internal predecessors, (2935), 286 states have call successors, (286), 220 states have call predecessors, (286), 274 states have return successors, (415), 300 states have call predecessors, (415), 282 states have call successors, (415) [2021-12-17 21:06:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 3636 transitions. [2021-12-17 21:06:44,080 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 3636 transitions. Word has length 65 [2021-12-17 21:06:44,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:44,081 INFO L470 AbstractCegarLoop]: Abstraction has 2791 states and 3636 transitions. [2021-12-17 21:06:44,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:06:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 3636 transitions. [2021-12-17 21:06:44,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:06:44,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:44,083 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] [2021-12-17 21:06:44,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 21:06:44,083 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:44,084 INFO L85 PathProgramCache]: Analyzing trace with hash -635681848, now seen corresponding path program 1 times [2021-12-17 21:06:44,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:44,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890378749] [2021-12-17 21:06:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:44,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:44,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:44,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890378749] [2021-12-17 21:06:44,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890378749] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:44,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:44,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:06:44,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800061704] [2021-12-17 21:06:44,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:44,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:06:44,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:44,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:06:44,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:06:44,159 INFO L87 Difference]: Start difference. First operand 2791 states and 3636 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:06:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:44,789 INFO L93 Difference]: Finished difference Result 6243 states and 7968 transitions. [2021-12-17 21:06:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:06:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-17 21:06:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:44,806 INFO L225 Difference]: With dead ends: 6243 [2021-12-17 21:06:44,806 INFO L226 Difference]: Without dead ends: 3880 [2021-12-17 21:06:44,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:06:44,811 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 868 mSDsluCounter, 1468 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:44,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [877 Valid, 2240 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:06:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-12-17 21:06:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 3624. [2021-12-17 21:06:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 2874 states have (on average 1.2964509394572026) internal successors, (3726), 2927 states have internal predecessors, (3726), 378 states have call successors, (378), 300 states have call predecessors, (378), 370 states have return successors, (533), 401 states have call predecessors, (533), 374 states have call successors, (533) [2021-12-17 21:06:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 4637 transitions. [2021-12-17 21:06:44,920 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 4637 transitions. Word has length 66 [2021-12-17 21:06:44,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:44,920 INFO L470 AbstractCegarLoop]: Abstraction has 3624 states and 4637 transitions. [2021-12-17 21:06:44,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:06:44,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 4637 transitions. [2021-12-17 21:06:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 21:06:44,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:44,925 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:44,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 21:06:44,926 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:44,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2082238937, now seen corresponding path program 1 times [2021-12-17 21:06:44,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:44,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827793743] [2021-12-17 21:06:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:44,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:44,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:45,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:45,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:45,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:45,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827793743] [2021-12-17 21:06:45,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827793743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:45,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:45,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:06:45,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817496876] [2021-12-17 21:06:45,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:45,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:06:45,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:45,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:06:45,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:06:45,023 INFO L87 Difference]: Start difference. First operand 3624 states and 4637 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:06:45,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:45,394 INFO L93 Difference]: Finished difference Result 7635 states and 9611 transitions. [2021-12-17 21:06:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:06:45,395 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-17 21:06:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:45,412 INFO L225 Difference]: With dead ends: 7635 [2021-12-17 21:06:45,413 INFO L226 Difference]: Without dead ends: 4435 [2021-12-17 21:06:45,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:06:45,421 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1467 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:45,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1932 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:06:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-12-17 21:06:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 4187. [2021-12-17 21:06:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4187 states, 3321 states have (on average 1.2866606443842217) internal successors, (4273), 3380 states have internal predecessors, (4273), 434 states have call successors, (434), 350 states have call predecessors, (434), 430 states have return successors, (610), 461 states have call predecessors, (610), 430 states have call successors, (610) [2021-12-17 21:06:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 5317 transitions. [2021-12-17 21:06:45,576 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 5317 transitions. Word has length 72 [2021-12-17 21:06:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:45,577 INFO L470 AbstractCegarLoop]: Abstraction has 4187 states and 5317 transitions. [2021-12-17 21:06:45,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:06:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 5317 transitions. [2021-12-17 21:06:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 21:06:45,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:45,579 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:45,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 21:06:45,580 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash -641928531, now seen corresponding path program 1 times [2021-12-17 21:06:45,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:45,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375639950] [2021-12-17 21:06:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:45,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:45,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:45,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:45,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:45,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:45,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:45,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:45,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:45,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:45,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375639950] [2021-12-17 21:06:45,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375639950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:45,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:45,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:45,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474238263] [2021-12-17 21:06:45,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:45,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:45,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:45,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:45,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:45,671 INFO L87 Difference]: Start difference. First operand 4187 states and 5317 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 21:06:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:46,135 INFO L93 Difference]: Finished difference Result 5256 states and 6601 transitions. [2021-12-17 21:06:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:06:46,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-17 21:06:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:46,158 INFO L225 Difference]: With dead ends: 5256 [2021-12-17 21:06:46,158 INFO L226 Difference]: Without dead ends: 5253 [2021-12-17 21:06:46,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-17 21:06:46,163 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 2206 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2216 SdHoareTripleChecker+Valid, 1900 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:46,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2216 Valid, 1900 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:06:46,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2021-12-17 21:06:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 4944. [2021-12-17 21:06:46,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4944 states, 3899 states have (on average 1.2744293408566298) internal successors, (4969), 3965 states have internal predecessors, (4969), 517 states have call successors, (517), 422 states have call predecessors, (517), 526 states have return successors, (738), 561 states have call predecessors, (738), 514 states have call successors, (738) [2021-12-17 21:06:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4944 states to 4944 states and 6224 transitions. [2021-12-17 21:06:46,388 INFO L78 Accepts]: Start accepts. Automaton has 4944 states and 6224 transitions. Word has length 73 [2021-12-17 21:06:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:46,389 INFO L470 AbstractCegarLoop]: Abstraction has 4944 states and 6224 transitions. [2021-12-17 21:06:46,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 21:06:46,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4944 states and 6224 transitions. [2021-12-17 21:06:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 21:06:46,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:46,392 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:46,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 21:06:46,393 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1573517105, now seen corresponding path program 1 times [2021-12-17 21:06:46,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:46,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876281052] [2021-12-17 21:06:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:46,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:46,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:46,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:46,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:46,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:46,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:46,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:46,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:46,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876281052] [2021-12-17 21:06:46,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876281052] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:06:46,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946192576] [2021-12-17 21:06:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:46,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:06:46,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:06:46,513 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:06:46,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 21:06:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:46,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:06:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:06:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:47,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:06:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:47,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946192576] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:06:47,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 21:06:47,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-17 21:06:47,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827382405] [2021-12-17 21:06:47,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 21:06:47,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:06:47,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:47,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:06:47,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:06:47,318 INFO L87 Difference]: Start difference. First operand 4944 states and 6224 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-17 21:06:48,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:48,744 INFO L93 Difference]: Finished difference Result 9458 states and 11709 transitions. [2021-12-17 21:06:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 21:06:48,745 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-17 21:06:48,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:48,796 INFO L225 Difference]: With dead ends: 9458 [2021-12-17 21:06:48,796 INFO L226 Difference]: Without dead ends: 9455 [2021-12-17 21:06:48,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-17 21:06:48,799 INFO L933 BasicCegarLoop]: 934 mSDtfsCounter, 3011 mSDsluCounter, 2093 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:48,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3078 Valid, 3027 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:06:48,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9455 states. [2021-12-17 21:06:49,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9455 to 8569. [2021-12-17 21:06:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8569 states, 6734 states have (on average 1.2567567567567568) internal successors, (8463), 6851 states have internal predecessors, (8463), 895 states have call successors, (895), 754 states have call predecessors, (895), 938 states have return successors, (1295), 968 states have call predecessors, (1295), 892 states have call successors, (1295) [2021-12-17 21:06:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8569 states to 8569 states and 10653 transitions. [2021-12-17 21:06:49,103 INFO L78 Accepts]: Start accepts. Automaton has 8569 states and 10653 transitions. Word has length 74 [2021-12-17 21:06:49,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:49,104 INFO L470 AbstractCegarLoop]: Abstraction has 8569 states and 10653 transitions. [2021-12-17 21:06:49,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-17 21:06:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 8569 states and 10653 transitions. [2021-12-17 21:06:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 21:06:49,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:49,106 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:49,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:06:49,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 21:06:49,320 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash -347460051, now seen corresponding path program 2 times [2021-12-17 21:06:49,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:49,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517342795] [2021-12-17 21:06:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:49,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:49,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:49,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:49,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:49,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:49,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:49,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:49,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:49,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:49,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517342795] [2021-12-17 21:06:49,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517342795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:49,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:49,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:06:49,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520270701] [2021-12-17 21:06:49,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:49,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:06:49,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:49,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:06:49,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:06:49,370 INFO L87 Difference]: Start difference. First operand 8569 states and 10653 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 21:06:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:49,803 INFO L93 Difference]: Finished difference Result 11599 states and 14400 transitions. [2021-12-17 21:06:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 21:06:49,804 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-17 21:06:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:49,823 INFO L225 Difference]: With dead ends: 11599 [2021-12-17 21:06:49,823 INFO L226 Difference]: Without dead ends: 4801 [2021-12-17 21:06:49,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:06:49,832 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 1738 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:49,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1775 Valid, 1624 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:06:49,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2021-12-17 21:06:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 3732. [2021-12-17 21:06:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 2965 states have (on average 1.267116357504216) internal successors, (3757), 3004 states have internal predecessors, (3757), 394 states have call successors, (394), 318 states have call predecessors, (394), 371 states have return successors, (519), 414 states have call predecessors, (519), 391 states have call successors, (519) [2021-12-17 21:06:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 4670 transitions. [2021-12-17 21:06:49,950 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 4670 transitions. Word has length 77 [2021-12-17 21:06:49,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:49,950 INFO L470 AbstractCegarLoop]: Abstraction has 3732 states and 4670 transitions. [2021-12-17 21:06:49,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 21:06:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 4670 transitions. [2021-12-17 21:06:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 21:06:49,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:49,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:49,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 21:06:49,953 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2092587107, now seen corresponding path program 1 times [2021-12-17 21:06:49,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:49,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141450594] [2021-12-17 21:06:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:49,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:49,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:50,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:50,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:50,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:50,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:50,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:50,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:50,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 21:06:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:06:50,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:50,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141450594] [2021-12-17 21:06:50,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141450594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:50,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:50,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:06:50,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873858775] [2021-12-17 21:06:50,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:50,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:06:50,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:50,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:06:50,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:06:50,022 INFO L87 Difference]: Start difference. First operand 3732 states and 4670 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:06:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:51,036 INFO L93 Difference]: Finished difference Result 10340 states and 12693 transitions. [2021-12-17 21:06:51,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 21:06:51,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-17 21:06:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:51,051 INFO L225 Difference]: With dead ends: 10340 [2021-12-17 21:06:51,051 INFO L226 Difference]: Without dead ends: 5964 [2021-12-17 21:06:51,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-17 21:06:51,060 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 1149 mSDsluCounter, 1917 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 2735 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:51,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 2735 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:06:51,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5964 states. [2021-12-17 21:06:51,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5964 to 5700. [2021-12-17 21:06:51,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5700 states, 4460 states have (on average 1.229596412556054) internal successors, (5484), 4542 states have internal predecessors, (5484), 610 states have call successors, (610), 504 states have call predecessors, (610), 628 states have return successors, (903), 658 states have call predecessors, (903), 607 states have call successors, (903) [2021-12-17 21:06:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 6997 transitions. [2021-12-17 21:06:51,264 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 6997 transitions. Word has length 84 [2021-12-17 21:06:51,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:51,264 INFO L470 AbstractCegarLoop]: Abstraction has 5700 states and 6997 transitions. [2021-12-17 21:06:51,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:06:51,265 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 6997 transitions. [2021-12-17 21:06:51,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 21:06:51,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:51,267 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:51,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:06:51,268 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:51,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1656161323, now seen corresponding path program 1 times [2021-12-17 21:06:51,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:51,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183215346] [2021-12-17 21:06:51,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:51,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:51,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:51,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:51,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:51,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:51,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:51,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:51,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:51,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 21:06:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 21:06:51,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:51,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183215346] [2021-12-17 21:06:51,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183215346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:51,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:51,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:06:51,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994986054] [2021-12-17 21:06:51,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:51,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:06:51,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:51,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:06:51,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:06:51,328 INFO L87 Difference]: Start difference. First operand 5700 states and 6997 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) [2021-12-17 21:06:52,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:52,566 INFO L93 Difference]: Finished difference Result 9347 states and 11355 transitions. [2021-12-17 21:06:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 21:06:52,567 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-17 21:06:52,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:52,582 INFO L225 Difference]: With dead ends: 9347 [2021-12-17 21:06:52,582 INFO L226 Difference]: Without dead ends: 4798 [2021-12-17 21:06:52,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-17 21:06:52,595 INFO L933 BasicCegarLoop]: 796 mSDtfsCounter, 2044 mSDsluCounter, 2315 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2084 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:52,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2084 Valid, 3111 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:06:52,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-12-17 21:06:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4367. [2021-12-17 21:06:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4367 states, 3413 states have (on average 1.2194550249047758) internal successors, (4162), 3478 states have internal predecessors, (4162), 467 states have call successors, (467), 379 states have call predecessors, (467), 485 states have return successors, (645), 514 states have call predecessors, (645), 464 states have call successors, (645) [2021-12-17 21:06:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4367 states to 4367 states and 5274 transitions. [2021-12-17 21:06:52,782 INFO L78 Accepts]: Start accepts. Automaton has 4367 states and 5274 transitions. Word has length 93 [2021-12-17 21:06:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:52,782 INFO L470 AbstractCegarLoop]: Abstraction has 4367 states and 5274 transitions. [2021-12-17 21:06:52,782 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) [2021-12-17 21:06:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 4367 states and 5274 transitions. [2021-12-17 21:06:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 21:06:52,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:52,786 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:52,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:06:52,787 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:52,787 INFO L85 PathProgramCache]: Analyzing trace with hash 887849757, now seen corresponding path program 1 times [2021-12-17 21:06:52,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:52,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207342117] [2021-12-17 21:06:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:52,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 21:06:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-17 21:06:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-17 21:06:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-17 21:06:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:06:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-17 21:06:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-17 21:06:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-17 21:06:52,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:52,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207342117] [2021-12-17 21:06:52,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207342117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:06:52,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452902519] [2021-12-17 21:06:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:52,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:06:52,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:06:52,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:06:52,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 21:06:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 21:06:53,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:06:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 21:06:53,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:06:53,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452902519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:53,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:06:53,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-17 21:06:53,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385036304] [2021-12-17 21:06:53,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:53,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:06:53,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:06:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-17 21:06:53,176 INFO L87 Difference]: Start difference. First operand 4367 states and 5274 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 21:06:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:53,277 INFO L93 Difference]: Finished difference Result 6587 states and 7913 transitions. [2021-12-17 21:06:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:06:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-17 21:06:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:53,285 INFO L225 Difference]: With dead ends: 6587 [2021-12-17 21:06:53,285 INFO L226 Difference]: Without dead ends: 2648 [2021-12-17 21:06:53,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-17 21:06:53,291 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 34 mSDsluCounter, 3071 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3848 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:53,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3848 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:06:53,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-12-17 21:06:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2492. [2021-12-17 21:06:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2038 states have (on average 1.2433758586849852) internal successors, (2534), 2057 states have internal predecessors, (2534), 229 states have call successors, (229), 173 states have call predecessors, (229), 223 states have return successors, (309), 262 states have call predecessors, (309), 226 states have call successors, (309) [2021-12-17 21:06:53,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 3072 transitions. [2021-12-17 21:06:53,393 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 3072 transitions. Word has length 145 [2021-12-17 21:06:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:53,394 INFO L470 AbstractCegarLoop]: Abstraction has 2492 states and 3072 transitions. [2021-12-17 21:06:53,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 21:06:53,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 3072 transitions. [2021-12-17 21:06:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 21:06:53,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:53,398 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:53,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 21:06:53,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 21:06:53,604 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:53,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:53,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1402885593, now seen corresponding path program 1 times [2021-12-17 21:06:53,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:53,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616456374] [2021-12-17 21:06:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:53,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 21:06:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 21:06:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 21:06:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-17 21:06:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-17 21:06:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-17 21:06:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-17 21:06:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-17 21:06:53,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:53,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616456374] [2021-12-17 21:06:53,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616456374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:53,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:53,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:06:53,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259972273] [2021-12-17 21:06:53,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:53,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:06:53,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:53,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:06:53,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:06:53,669 INFO L87 Difference]: Start difference. First operand 2492 states and 3072 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 21:06:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:54,167 INFO L93 Difference]: Finished difference Result 2546 states and 3128 transitions. [2021-12-17 21:06:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:06:54,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-17 21:06:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:54,171 INFO L225 Difference]: With dead ends: 2546 [2021-12-17 21:06:54,172 INFO L226 Difference]: Without dead ends: 2028 [2021-12-17 21:06:54,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:06:54,174 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 793 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:54,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 2160 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:06:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2021-12-17 21:06:54,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1977. [2021-12-17 21:06:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1641 states have (on average 1.2693479585618526) internal successors, (2083), 1656 states have internal predecessors, (2083), 172 states have call successors, (172), 124 states have call predecessors, (172), 162 states have return successors, (231), 197 states have call predecessors, (231), 169 states have call successors, (231) [2021-12-17 21:06:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2486 transitions. [2021-12-17 21:06:54,230 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2486 transitions. Word has length 147 [2021-12-17 21:06:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:54,230 INFO L470 AbstractCegarLoop]: Abstraction has 1977 states and 2486 transitions. [2021-12-17 21:06:54,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-17 21:06:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2486 transitions. [2021-12-17 21:06:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-17 21:06:54,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:54,233 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 21:06:54,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:06:54,233 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:54,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1576195005, now seen corresponding path program 1 times [2021-12-17 21:06:54,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:54,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601001677] [2021-12-17 21:06:54,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:54,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:06:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 21:06:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 21:06:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-17 21:06:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:54,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-17 21:06:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-17 21:06:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-17 21:06:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 21:06:54,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601001677] [2021-12-17 21:06:54,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601001677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:54,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:54,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:06:54,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469151564] [2021-12-17 21:06:54,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:54,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:06:54,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:54,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:06:54,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:06:54,313 INFO L87 Difference]: Start difference. First operand 1977 states and 2486 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-17 21:06:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:54,955 INFO L93 Difference]: Finished difference Result 3260 states and 4006 transitions. [2021-12-17 21:06:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 21:06:54,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-17 21:06:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:54,961 INFO L225 Difference]: With dead ends: 3260 [2021-12-17 21:06:54,961 INFO L226 Difference]: Without dead ends: 1870 [2021-12-17 21:06:54,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:06:54,963 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 1058 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 2334 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:54,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 2334 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:06:54,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-12-17 21:06:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1724. [2021-12-17 21:06:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1439 states have (on average 1.2876997915218902) internal successors, (1853), 1454 states have internal predecessors, (1853), 147 states have call successors, (147), 103 states have call predecessors, (147), 136 states have return successors, (193), 167 states have call predecessors, (193), 144 states have call successors, (193) [2021-12-17 21:06:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2193 transitions. [2021-12-17 21:06:55,041 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2193 transitions. Word has length 159 [2021-12-17 21:06:55,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:55,041 INFO L470 AbstractCegarLoop]: Abstraction has 1724 states and 2193 transitions. [2021-12-17 21:06:55,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-17 21:06:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2193 transitions. [2021-12-17 21:06:55,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-17 21:06:55,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:55,044 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:55,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:06:55,045 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:55,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:55,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1931976376, now seen corresponding path program 1 times [2021-12-17 21:06:55,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:55,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371689564] [2021-12-17 21:06:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:55,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:06:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:06:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:06:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:06:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:06:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 21:06:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-17 21:06:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 21:06:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:06:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:06:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-17 21:06:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-17 21:06:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:06:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-17 21:06:55,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:55,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371689564] [2021-12-17 21:06:55,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371689564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:06:55,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002446608] [2021-12-17 21:06:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:55,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:06:55,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:06:55,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:06:55,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 21:06:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:55,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 21:06:55,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:06:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-17 21:06:55,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:06:55,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002446608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:55,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:06:55,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-17 21:06:55,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870156726] [2021-12-17 21:06:55,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:55,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 21:06:55,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 21:06:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:06:55,574 INFO L87 Difference]: Start difference. First operand 1724 states and 2193 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 21:06:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:55,980 INFO L93 Difference]: Finished difference Result 4050 states and 5001 transitions. [2021-12-17 21:06:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 21:06:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 162 [2021-12-17 21:06:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:55,986 INFO L225 Difference]: With dead ends: 4050 [2021-12-17 21:06:55,986 INFO L226 Difference]: Without dead ends: 2640 [2021-12-17 21:06:55,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 191 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-17 21:06:55,989 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 398 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:55,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 1518 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:06:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-12-17 21:06:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2598. [2021-12-17 21:06:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.23963133640553) internal successors, (2690), 2189 states have internal predecessors, (2690), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-17 21:06:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3211 transitions. [2021-12-17 21:06:56,067 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3211 transitions. Word has length 162 [2021-12-17 21:06:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:56,067 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3211 transitions. [2021-12-17 21:06:56,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-17 21:06:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3211 transitions. [2021-12-17 21:06:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:06:56,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:56,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:56,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 21:06:56,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:06:56,294 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:56,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1228190577, now seen corresponding path program 1 times [2021-12-17 21:06:56,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:56,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746854598] [2021-12-17 21:06:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:56,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:56,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:56,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:06:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:56,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:06:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:56,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:06:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:56,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:06:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:56,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:56,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746854598] [2021-12-17 21:06:56,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746854598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:56,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:56,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:06:56,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122380663] [2021-12-17 21:06:56,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:56,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:06:56,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:06:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:06:56,405 INFO L87 Difference]: Start difference. First operand 2598 states and 3211 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-17 21:06:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:57,813 INFO L93 Difference]: Finished difference Result 3154 states and 4115 transitions. [2021-12-17 21:06:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:06:57,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-17 21:06:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:57,820 INFO L225 Difference]: With dead ends: 3154 [2021-12-17 21:06:57,820 INFO L226 Difference]: Without dead ends: 2751 [2021-12-17 21:06:57,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:06:57,821 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 1221 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1246 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:57,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1246 Valid, 1473 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:06:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-12-17 21:06:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2598. [2021-12-17 21:06:57,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.2391705069124423) internal successors, (2689), 2189 states have internal predecessors, (2689), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-17 21:06:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3210 transitions. [2021-12-17 21:06:57,977 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3210 transitions. Word has length 190 [2021-12-17 21:06:57,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:57,977 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3210 transitions. [2021-12-17 21:06:57,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-17 21:06:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3210 transitions. [2021-12-17 21:06:57,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:06:57,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:57,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:57,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:06:57,980 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:57,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1718643149, now seen corresponding path program 1 times [2021-12-17 21:06:57,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:57,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812386910] [2021-12-17 21:06:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:57,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:58,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:58,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:06:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:58,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:06:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:58,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:06:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:58,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:06:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:58,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:58,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812386910] [2021-12-17 21:06:58,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812386910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:58,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:58,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:06:58,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12090744] [2021-12-17 21:06:58,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:58,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:06:58,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:58,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:06:58,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:06:58,088 INFO L87 Difference]: Start difference. First operand 2598 states and 3210 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-17 21:06:59,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:06:59,494 INFO L93 Difference]: Finished difference Result 3146 states and 4098 transitions. [2021-12-17 21:06:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:06:59,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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 190 [2021-12-17 21:06:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:06:59,500 INFO L225 Difference]: With dead ends: 3146 [2021-12-17 21:06:59,500 INFO L226 Difference]: Without dead ends: 2751 [2021-12-17 21:06:59,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:06:59,502 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 1212 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:06:59,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1237 Valid, 1471 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:06:59,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-12-17 21:06:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2598. [2021-12-17 21:06:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.238709677419355) internal successors, (2688), 2189 states have internal predecessors, (2688), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-17 21:06:59,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3209 transitions. [2021-12-17 21:06:59,654 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3209 transitions. Word has length 190 [2021-12-17 21:06:59,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:06:59,654 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3209 transitions. [2021-12-17 21:06:59,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 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) [2021-12-17 21:06:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3209 transitions. [2021-12-17 21:06:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:06:59,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:06:59,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:06:59,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:06:59,657 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:06:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:06:59,657 INFO L85 PathProgramCache]: Analyzing trace with hash -887989515, now seen corresponding path program 1 times [2021-12-17 21:06:59,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:06:59,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12859627] [2021-12-17 21:06:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:06:59,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:06:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:06:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:06:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:06:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:06:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:06:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:06:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:06:59,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:06:59,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12859627] [2021-12-17 21:06:59,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12859627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:06:59,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:06:59,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:06:59,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993363699] [2021-12-17 21:06:59,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:06:59,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:06:59,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:06:59,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:06:59,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:06:59,800 INFO L87 Difference]: Start difference. First operand 2598 states and 3209 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-12-17 21:07:01,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:01,503 INFO L93 Difference]: Finished difference Result 3138 states and 4084 transitions. [2021-12-17 21:07:01,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:07:01,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:01,526 INFO L225 Difference]: With dead ends: 3138 [2021-12-17 21:07:01,526 INFO L226 Difference]: Without dead ends: 2750 [2021-12-17 21:07:01,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:07:01,529 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 1314 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1345 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:01,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1345 Valid, 1673 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 21:07:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-12-17 21:07:01,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2598. [2021-12-17 21:07:01,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.2382488479262672) internal successors, (2687), 2189 states have internal predecessors, (2687), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-17 21:07:01,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3208 transitions. [2021-12-17 21:07:01,694 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3208 transitions. Word has length 190 [2021-12-17 21:07:01,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:01,694 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3208 transitions. [2021-12-17 21:07:01,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 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) [2021-12-17 21:07:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3208 transitions. [2021-12-17 21:07:01,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:01,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:01,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:01,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:07:01,697 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:01,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:01,697 INFO L85 PathProgramCache]: Analyzing trace with hash -379210701, now seen corresponding path program 1 times [2021-12-17 21:07:01,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:01,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647045927] [2021-12-17 21:07:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:01,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:01,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:01,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:01,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:01,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:01,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:01,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:01,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647045927] [2021-12-17 21:07:01,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647045927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:01,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:01,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:01,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189474287] [2021-12-17 21:07:01,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:01,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:01,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:01,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:01,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:01,814 INFO L87 Difference]: Start difference. First operand 2598 states and 3208 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:03,325 INFO L93 Difference]: Finished difference Result 3165 states and 4135 transitions. [2021-12-17 21:07:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:03,325 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:03,331 INFO L225 Difference]: With dead ends: 3165 [2021-12-17 21:07:03,331 INFO L226 Difference]: Without dead ends: 2777 [2021-12-17 21:07:03,332 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 [2021-12-17 21:07:03,333 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1751 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1782 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:03,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1782 Valid, 1744 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:07:03,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-12-17 21:07:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 2598. [2021-12-17 21:07:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.2377880184331798) internal successors, (2686), 2189 states have internal predecessors, (2686), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-17 21:07:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3207 transitions. [2021-12-17 21:07:03,457 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3207 transitions. Word has length 190 [2021-12-17 21:07:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:03,457 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3207 transitions. [2021-12-17 21:07:03,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3207 transitions. [2021-12-17 21:07:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:03,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:03,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:03,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 21:07:03,460 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:03,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1992506165, now seen corresponding path program 1 times [2021-12-17 21:07:03,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:03,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320971595] [2021-12-17 21:07:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:03,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:03,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:03,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:03,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:03,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:03,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:03,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:03,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320971595] [2021-12-17 21:07:03,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320971595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:03,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:03,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:03,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733046605] [2021-12-17 21:07:03,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:03,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:03,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:03,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:03,566 INFO L87 Difference]: Start difference. First operand 2598 states and 3207 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:05,162 INFO L93 Difference]: Finished difference Result 3163 states and 4129 transitions. [2021-12-17 21:07:05,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:05,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:05,169 INFO L225 Difference]: With dead ends: 3163 [2021-12-17 21:07:05,169 INFO L226 Difference]: Without dead ends: 2775 [2021-12-17 21:07:05,170 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 [2021-12-17 21:07:05,171 INFO L933 BasicCegarLoop]: 826 mSDtfsCounter, 1641 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1672 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:05,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1672 Valid, 1797 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:07:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2021-12-17 21:07:05,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2598. [2021-12-17 21:07:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.237327188940092) internal successors, (2685), 2189 states have internal predecessors, (2685), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-17 21:07:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3206 transitions. [2021-12-17 21:07:05,302 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3206 transitions. Word has length 190 [2021-12-17 21:07:05,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:05,302 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3206 transitions. [2021-12-17 21:07:05,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:05,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3206 transitions. [2021-12-17 21:07:05,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:05,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:05,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:05,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 21:07:05,305 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:05,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:05,306 INFO L85 PathProgramCache]: Analyzing trace with hash 267897843, now seen corresponding path program 1 times [2021-12-17 21:07:05,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:05,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135017907] [2021-12-17 21:07:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:05,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:05,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:05,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:05,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:05,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:05,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:05,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:05,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135017907] [2021-12-17 21:07:05,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135017907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:05,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:05,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:05,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624950354] [2021-12-17 21:07:05,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:05,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:05,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:05,428 INFO L87 Difference]: Start difference. First operand 2598 states and 3206 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:07,085 INFO L93 Difference]: Finished difference Result 3135 states and 4074 transitions. [2021-12-17 21:07:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:07:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:07,091 INFO L225 Difference]: With dead ends: 3135 [2021-12-17 21:07:07,091 INFO L226 Difference]: Without dead ends: 2747 [2021-12-17 21:07:07,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:07:07,093 INFO L933 BasicCegarLoop]: 771 mSDtfsCounter, 1408 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:07,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1439 Valid, 2007 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 21:07:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2021-12-17 21:07:07,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2598. [2021-12-17 21:07:07,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2598 states, 2170 states have (on average 1.2359447004608295) internal successors, (2682), 2189 states have internal predecessors, (2682), 217 states have call successors, (217), 154 states have call predecessors, (217), 209 states have return successors, (304), 255 states have call predecessors, (304), 214 states have call successors, (304) [2021-12-17 21:07:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2598 states to 2598 states and 3203 transitions. [2021-12-17 21:07:07,226 INFO L78 Accepts]: Start accepts. Automaton has 2598 states and 3203 transitions. Word has length 190 [2021-12-17 21:07:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:07,227 INFO L470 AbstractCegarLoop]: Abstraction has 2598 states and 3203 transitions. [2021-12-17 21:07:07,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:07,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2598 states and 3203 transitions. [2021-12-17 21:07:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:07,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:07,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:07,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 21:07:07,229 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:07,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:07,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1659940983, now seen corresponding path program 1 times [2021-12-17 21:07:07,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:07,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537759651] [2021-12-17 21:07:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:07,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:07,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:07,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:07,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:07,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:07,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:07,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:07,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:07,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537759651] [2021-12-17 21:07:07,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537759651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:07,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:07,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:07:07,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651630281] [2021-12-17 21:07:07,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:07,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:07:07,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:07,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:07:07,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:07:07,350 INFO L87 Difference]: Start difference. First operand 2598 states and 3203 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:07:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:10,689 INFO L93 Difference]: Finished difference Result 3718 states and 5012 transitions. [2021-12-17 21:07:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:07:10,689 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:10,697 INFO L225 Difference]: With dead ends: 3718 [2021-12-17 21:07:10,697 INFO L226 Difference]: Without dead ends: 3330 [2021-12-17 21:07:10,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:07:10,699 INFO L933 BasicCegarLoop]: 1200 mSDtfsCounter, 2053 mSDsluCounter, 3139 mSDsCounter, 0 mSdLazyCounter, 3578 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2084 SdHoareTripleChecker+Valid, 4339 SdHoareTripleChecker+Invalid, 3703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:10,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2084 Valid, 4339 Invalid, 3703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3578 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 21:07:10,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-12-17 21:07:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 3005. [2021-12-17 21:07:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 2547 states have (on average 1.287789556340793) internal successors, (3280), 2567 states have internal predecessors, (3280), 240 states have call successors, (240), 160 states have call predecessors, (240), 216 states have return successors, (330), 279 states have call predecessors, (330), 237 states have call successors, (330) [2021-12-17 21:07:10,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 3850 transitions. [2021-12-17 21:07:10,885 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 3850 transitions. Word has length 190 [2021-12-17 21:07:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:10,885 INFO L470 AbstractCegarLoop]: Abstraction has 3005 states and 3850 transitions. [2021-12-17 21:07:10,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:07:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 3850 transitions. [2021-12-17 21:07:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:10,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:10,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:10,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 21:07:10,888 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2064754507, now seen corresponding path program 1 times [2021-12-17 21:07:10,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:10,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137493483] [2021-12-17 21:07:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:10,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:10,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:10,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:10,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:11,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:11,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:11,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:11,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137493483] [2021-12-17 21:07:11,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137493483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:11,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:11,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:07:11,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881840362] [2021-12-17 21:07:11,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:11,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:07:11,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:11,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:07:11,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:07:11,011 INFO L87 Difference]: Start difference. First operand 3005 states and 3850 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:07:14,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:14,042 INFO L93 Difference]: Finished difference Result 5302 states and 7586 transitions. [2021-12-17 21:07:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:07:14,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:14,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:14,052 INFO L225 Difference]: With dead ends: 5302 [2021-12-17 21:07:14,052 INFO L226 Difference]: Without dead ends: 4507 [2021-12-17 21:07:14,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:07:14,054 INFO L933 BasicCegarLoop]: 1189 mSDtfsCounter, 2424 mSDsluCounter, 2681 mSDsCounter, 0 mSdLazyCounter, 3195 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 3870 SdHoareTripleChecker+Invalid, 3364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 3195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:14,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2455 Valid, 3870 Invalid, 3364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 3195 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:07:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-12-17 21:07:14,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3863. [2021-12-17 21:07:14,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3343 states have (on average 1.3631468740652108) internal successors, (4557), 3367 states have internal predecessors, (4557), 286 states have call successors, (286), 172 states have call predecessors, (286), 232 states have return successors, (388), 327 states have call predecessors, (388), 283 states have call successors, (388) [2021-12-17 21:07:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 5231 transitions. [2021-12-17 21:07:14,266 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 5231 transitions. Word has length 190 [2021-12-17 21:07:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:14,266 INFO L470 AbstractCegarLoop]: Abstraction has 3863 states and 5231 transitions. [2021-12-17 21:07:14,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:07:14,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 5231 transitions. [2021-12-17 21:07:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:14,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:14,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:14,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 21:07:14,271 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:14,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1444214899, now seen corresponding path program 1 times [2021-12-17 21:07:14,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:14,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883994665] [2021-12-17 21:07:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:14,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:14,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:14,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:14,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:14,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:14,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:14,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:14,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:14,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883994665] [2021-12-17 21:07:14,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883994665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:14,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:14,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:14,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681539028] [2021-12-17 21:07:14,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:14,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:14,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:14,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:14,399 INFO L87 Difference]: Start difference. First operand 3863 states and 5231 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:16,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:16,051 INFO L93 Difference]: Finished difference Result 6308 states and 9263 transitions. [2021-12-17 21:07:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:16,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:16,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:16,061 INFO L225 Difference]: With dead ends: 6308 [2021-12-17 21:07:16,061 INFO L226 Difference]: Without dead ends: 4655 [2021-12-17 21:07:16,064 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 [2021-12-17 21:07:16,064 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 1636 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:16,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 1773 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:07:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4655 states. [2021-12-17 21:07:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4655 to 3863. [2021-12-17 21:07:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3343 states have (on average 1.361950344002393) internal successors, (4553), 3367 states have internal predecessors, (4553), 286 states have call successors, (286), 172 states have call predecessors, (286), 232 states have return successors, (388), 327 states have call predecessors, (388), 283 states have call successors, (388) [2021-12-17 21:07:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 5227 transitions. [2021-12-17 21:07:16,301 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 5227 transitions. Word has length 190 [2021-12-17 21:07:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:16,302 INFO L470 AbstractCegarLoop]: Abstraction has 3863 states and 5227 transitions. [2021-12-17 21:07:16,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 5227 transitions. [2021-12-17 21:07:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:16,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:16,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:16,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 21:07:16,304 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:16,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2111596789, now seen corresponding path program 1 times [2021-12-17 21:07:16,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:16,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319690247] [2021-12-17 21:07:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:16,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:16,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:16,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:16,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:16,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:16,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:16,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:16,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319690247] [2021-12-17 21:07:16,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319690247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:16,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:16,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:16,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357525324] [2021-12-17 21:07:16,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:16,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:16,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:16,422 INFO L87 Difference]: Start difference. First operand 3863 states and 5227 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:18,072 INFO L93 Difference]: Finished difference Result 6299 states and 9233 transitions. [2021-12-17 21:07:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:18,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:18,081 INFO L225 Difference]: With dead ends: 6299 [2021-12-17 21:07:18,082 INFO L226 Difference]: Without dead ends: 4646 [2021-12-17 21:07:18,085 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 [2021-12-17 21:07:18,085 INFO L933 BasicCegarLoop]: 801 mSDtfsCounter, 1634 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:18,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1665 Valid, 1769 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1491 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:07:18,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-12-17 21:07:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3863. [2021-12-17 21:07:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3343 states have (on average 1.3607538139395752) internal successors, (4549), 3367 states have internal predecessors, (4549), 286 states have call successors, (286), 172 states have call predecessors, (286), 232 states have return successors, (388), 327 states have call predecessors, (388), 283 states have call successors, (388) [2021-12-17 21:07:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 5223 transitions. [2021-12-17 21:07:18,292 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 5223 transitions. Word has length 190 [2021-12-17 21:07:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:18,293 INFO L470 AbstractCegarLoop]: Abstraction has 3863 states and 5223 transitions. [2021-12-17 21:07:18,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:18,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 5223 transitions. [2021-12-17 21:07:18,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:18,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:18,295 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:18,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 21:07:18,295 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash -83632077, now seen corresponding path program 1 times [2021-12-17 21:07:18,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:18,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794596519] [2021-12-17 21:07:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:18,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:18,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:18,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:18,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:18,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:18,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:18,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:18,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794596519] [2021-12-17 21:07:18,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794596519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:18,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:18,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:07:18,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928863007] [2021-12-17 21:07:18,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:18,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:07:18,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:18,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:07:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:07:18,408 INFO L87 Difference]: Start difference. First operand 3863 states and 5223 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:07:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:21,417 INFO L93 Difference]: Finished difference Result 8615 states and 12983 transitions. [2021-12-17 21:07:21,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:07:21,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:21,431 INFO L225 Difference]: With dead ends: 8615 [2021-12-17 21:07:21,432 INFO L226 Difference]: Without dead ends: 6962 [2021-12-17 21:07:21,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:07:21,437 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 2551 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 2848 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 2497 SdHoareTripleChecker+Invalid, 3095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:21,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2582 Valid, 2497 Invalid, 3095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2848 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 21:07:21,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6962 states. [2021-12-17 21:07:21,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6962 to 5690. [2021-12-17 21:07:21,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 5040 states have (on average 1.4478174603174603) internal successors, (7297), 5078 states have internal predecessors, (7297), 378 states have call successors, (378), 196 states have call predecessors, (378), 270 states have return successors, (528), 423 states have call predecessors, (528), 375 states have call successors, (528) [2021-12-17 21:07:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 8203 transitions. [2021-12-17 21:07:21,766 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 8203 transitions. Word has length 190 [2021-12-17 21:07:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:21,766 INFO L470 AbstractCegarLoop]: Abstraction has 5690 states and 8203 transitions. [2021-12-17 21:07:21,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:07:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 8203 transitions. [2021-12-17 21:07:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:21,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:21,769 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:21,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 21:07:21,769 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:21,769 INFO L85 PathProgramCache]: Analyzing trace with hash 261196085, now seen corresponding path program 1 times [2021-12-17 21:07:21,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:21,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359071810] [2021-12-17 21:07:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:21,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:21,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:21,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:21,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:21,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:21,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:21,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:21,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359071810] [2021-12-17 21:07:21,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359071810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:21,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:21,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:21,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615898546] [2021-12-17 21:07:21,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:21,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:21,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:21,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:21,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:21,898 INFO L87 Difference]: Start difference. First operand 5690 states and 8203 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:23,800 INFO L93 Difference]: Finished difference Result 10871 states and 16821 transitions. [2021-12-17 21:07:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:23,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:23,816 INFO L225 Difference]: With dead ends: 10871 [2021-12-17 21:07:23,816 INFO L226 Difference]: Without dead ends: 7391 [2021-12-17 21:07:23,824 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 [2021-12-17 21:07:23,825 INFO L933 BasicCegarLoop]: 794 mSDtfsCounter, 1404 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 2029 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:23,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 2029 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1657 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:07:23,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-12-17 21:07:24,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 5690. [2021-12-17 21:07:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 5040 states have (on average 1.4462301587301587) internal successors, (7289), 5078 states have internal predecessors, (7289), 378 states have call successors, (378), 196 states have call predecessors, (378), 270 states have return successors, (528), 423 states have call predecessors, (528), 375 states have call successors, (528) [2021-12-17 21:07:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 8195 transitions. [2021-12-17 21:07:24,175 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 8195 transitions. Word has length 190 [2021-12-17 21:07:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:24,175 INFO L470 AbstractCegarLoop]: Abstraction has 5690 states and 8195 transitions. [2021-12-17 21:07:24,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 8195 transitions. [2021-12-17 21:07:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:24,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:24,178 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:24,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 21:07:24,178 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:24,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1242150899, now seen corresponding path program 1 times [2021-12-17 21:07:24,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:24,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971095872] [2021-12-17 21:07:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:24,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:24,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:24,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:24,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:24,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:24,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:24,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:24,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971095872] [2021-12-17 21:07:24,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971095872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:24,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:24,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:24,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501068583] [2021-12-17 21:07:24,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:24,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:24,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:24,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:24,281 INFO L87 Difference]: Start difference. First operand 5690 states and 8195 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:25,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:25,961 INFO L93 Difference]: Finished difference Result 10844 states and 16743 transitions. [2021-12-17 21:07:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:25,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:25,975 INFO L225 Difference]: With dead ends: 10844 [2021-12-17 21:07:25,975 INFO L226 Difference]: Without dead ends: 7364 [2021-12-17 21:07:25,980 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 [2021-12-17 21:07:25,980 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 1631 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1662 SdHoareTripleChecker+Valid, 1758 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:25,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1662 Valid, 1758 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:07:25,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7364 states. [2021-12-17 21:07:26,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7364 to 5690. [2021-12-17 21:07:26,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 5040 states have (on average 1.4446428571428571) internal successors, (7281), 5078 states have internal predecessors, (7281), 378 states have call successors, (378), 196 states have call predecessors, (378), 270 states have return successors, (528), 423 states have call predecessors, (528), 375 states have call successors, (528) [2021-12-17 21:07:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 8187 transitions. [2021-12-17 21:07:26,307 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 8187 transitions. Word has length 190 [2021-12-17 21:07:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:26,307 INFO L470 AbstractCegarLoop]: Abstraction has 5690 states and 8187 transitions. [2021-12-17 21:07:26,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 8187 transitions. [2021-12-17 21:07:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:26,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:26,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:26,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 21:07:26,310 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:26,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:26,310 INFO L85 PathProgramCache]: Analyzing trace with hash -527320715, now seen corresponding path program 1 times [2021-12-17 21:07:26,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:26,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147530387] [2021-12-17 21:07:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:26,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:26,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:26,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:26,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:26,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:26,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:26,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:26,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:26,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147530387] [2021-12-17 21:07:26,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147530387] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:26,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:26,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:26,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540677605] [2021-12-17 21:07:26,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:26,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:26,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:26,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:26,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:26,412 INFO L87 Difference]: Start difference. First operand 5690 states and 8187 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:28,396 INFO L93 Difference]: Finished difference Result 10817 states and 16665 transitions. [2021-12-17 21:07:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:28,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:28,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:28,410 INFO L225 Difference]: With dead ends: 10817 [2021-12-17 21:07:28,410 INFO L226 Difference]: Without dead ends: 7337 [2021-12-17 21:07:28,416 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 [2021-12-17 21:07:28,417 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 1402 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:28,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1433 Valid, 2019 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 21:07:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7337 states. [2021-12-17 21:07:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7337 to 5690. [2021-12-17 21:07:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5690 states, 5040 states have (on average 1.4430555555555555) internal successors, (7273), 5078 states have internal predecessors, (7273), 378 states have call successors, (378), 196 states have call predecessors, (378), 270 states have return successors, (528), 423 states have call predecessors, (528), 375 states have call successors, (528) [2021-12-17 21:07:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5690 states to 5690 states and 8179 transitions. [2021-12-17 21:07:28,789 INFO L78 Accepts]: Start accepts. Automaton has 5690 states and 8179 transitions. Word has length 190 [2021-12-17 21:07:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:28,789 INFO L470 AbstractCegarLoop]: Abstraction has 5690 states and 8179 transitions. [2021-12-17 21:07:28,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5690 states and 8179 transitions. [2021-12-17 21:07:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:28,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:28,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:28,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 21:07:28,795 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:28,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1138589773, now seen corresponding path program 1 times [2021-12-17 21:07:28,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:28,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251934945] [2021-12-17 21:07:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:28,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:28,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:28,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:28,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:28,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:28,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:28,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:28,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251934945] [2021-12-17 21:07:28,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251934945] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:28,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:28,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:07:28,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098211536] [2021-12-17 21:07:28,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:28,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:07:28,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:07:28,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:07:28,912 INFO L87 Difference]: Start difference. First operand 5690 states and 8179 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:07:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:32,870 INFO L93 Difference]: Finished difference Result 17077 states and 26721 transitions. [2021-12-17 21:07:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:07:32,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:32,897 INFO L225 Difference]: With dead ends: 17077 [2021-12-17 21:07:32,897 INFO L226 Difference]: Without dead ends: 13597 [2021-12-17 21:07:32,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:07:32,906 INFO L933 BasicCegarLoop]: 1359 mSDtfsCounter, 2516 mSDsluCounter, 2669 mSDsCounter, 0 mSdLazyCounter, 3676 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2546 SdHoareTripleChecker+Valid, 4028 SdHoareTripleChecker+Invalid, 3851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 3676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:32,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2546 Valid, 4028 Invalid, 3851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 3676 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 21:07:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13597 states. [2021-12-17 21:07:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13597 to 9545. [2021-12-17 21:07:33,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9545 states, 8625 states have (on average 1.5212753623188406) internal successors, (13121), 8709 states have internal predecessors, (13121), 554 states have call successors, (554), 244 states have call predecessors, (554), 364 states have return successors, (896), 607 states have call predecessors, (896), 551 states have call successors, (896) [2021-12-17 21:07:33,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9545 states to 9545 states and 14571 transitions. [2021-12-17 21:07:33,514 INFO L78 Accepts]: Start accepts. Automaton has 9545 states and 14571 transitions. Word has length 190 [2021-12-17 21:07:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:33,514 INFO L470 AbstractCegarLoop]: Abstraction has 9545 states and 14571 transitions. [2021-12-17 21:07:33,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:07:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 9545 states and 14571 transitions. [2021-12-17 21:07:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:33,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:33,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:33,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 21:07:33,518 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:33,518 INFO L85 PathProgramCache]: Analyzing trace with hash 755744113, now seen corresponding path program 1 times [2021-12-17 21:07:33,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:33,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562016836] [2021-12-17 21:07:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:33,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:33,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:33,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:33,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:33,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:33,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:33,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:33,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562016836] [2021-12-17 21:07:33,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562016836] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:33,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:33,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:33,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622439731] [2021-12-17 21:07:33,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:33,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:33,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:33,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:33,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:33,632 INFO L87 Difference]: Start difference. First operand 9545 states and 14571 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:35,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:35,673 INFO L93 Difference]: Finished difference Result 20390 states and 32765 transitions. [2021-12-17 21:07:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:35,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:35,699 INFO L225 Difference]: With dead ends: 20390 [2021-12-17 21:07:35,699 INFO L226 Difference]: Without dead ends: 13055 [2021-12-17 21:07:35,711 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 [2021-12-17 21:07:35,712 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1627 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 1741 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:35,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1658 Valid, 1741 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:07:35,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13055 states. [2021-12-17 21:07:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13055 to 9545. [2021-12-17 21:07:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9545 states, 8625 states have (on average 1.5194202898550724) internal successors, (13105), 8709 states have internal predecessors, (13105), 554 states have call successors, (554), 244 states have call predecessors, (554), 364 states have return successors, (896), 607 states have call predecessors, (896), 551 states have call successors, (896) [2021-12-17 21:07:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9545 states to 9545 states and 14555 transitions. [2021-12-17 21:07:36,459 INFO L78 Accepts]: Start accepts. Automaton has 9545 states and 14555 transitions. Word has length 190 [2021-12-17 21:07:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:36,460 INFO L470 AbstractCegarLoop]: Abstraction has 9545 states and 14555 transitions. [2021-12-17 21:07:36,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:36,460 INFO L276 IsEmpty]: Start isEmpty. Operand 9545 states and 14555 transitions. [2021-12-17 21:07:36,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:36,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:36,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:36,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 21:07:36,463 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:36,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2092642317, now seen corresponding path program 1 times [2021-12-17 21:07:36,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:36,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558059225] [2021-12-17 21:07:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:36,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:36,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:36,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:36,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:36,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:36,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:36,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:36,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558059225] [2021-12-17 21:07:36,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558059225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:36,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:36,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:36,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494757879] [2021-12-17 21:07:36,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:36,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:36,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:36,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:36,568 INFO L87 Difference]: Start difference. First operand 9545 states and 14555 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:38,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:38,840 INFO L93 Difference]: Finished difference Result 20309 states and 32555 transitions. [2021-12-17 21:07:38,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:38,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:38,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:38,869 INFO L225 Difference]: With dead ends: 20309 [2021-12-17 21:07:38,869 INFO L226 Difference]: Without dead ends: 12974 [2021-12-17 21:07:38,883 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 [2021-12-17 21:07:38,884 INFO L933 BasicCegarLoop]: 771 mSDtfsCounter, 1396 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 1595 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:38,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1427 Valid, 2004 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1595 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:07:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12974 states. [2021-12-17 21:07:39,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12974 to 9545. [2021-12-17 21:07:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9545 states, 8625 states have (on average 1.5175652173913043) internal successors, (13089), 8709 states have internal predecessors, (13089), 554 states have call successors, (554), 244 states have call predecessors, (554), 364 states have return successors, (896), 607 states have call predecessors, (896), 551 states have call successors, (896) [2021-12-17 21:07:39,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9545 states to 9545 states and 14539 transitions. [2021-12-17 21:07:39,509 INFO L78 Accepts]: Start accepts. Automaton has 9545 states and 14539 transitions. Word has length 190 [2021-12-17 21:07:39,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:39,510 INFO L470 AbstractCegarLoop]: Abstraction has 9545 states and 14539 transitions. [2021-12-17 21:07:39,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 9545 states and 14539 transitions. [2021-12-17 21:07:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:39,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:39,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:39,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 21:07:39,513 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1279157553, now seen corresponding path program 1 times [2021-12-17 21:07:39,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:39,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336903229] [2021-12-17 21:07:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:39,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:39,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:39,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:39,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:39,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:39,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:39,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:39,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336903229] [2021-12-17 21:07:39,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336903229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:39,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:39,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:39,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41459160] [2021-12-17 21:07:39,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:39,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:39,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:39,626 INFO L87 Difference]: Start difference. First operand 9545 states and 14539 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:41,705 INFO L93 Difference]: Finished difference Result 20228 states and 32345 transitions. [2021-12-17 21:07:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:41,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:41,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:41,731 INFO L225 Difference]: With dead ends: 20228 [2021-12-17 21:07:41,731 INFO L226 Difference]: Without dead ends: 12893 [2021-12-17 21:07:41,744 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 [2021-12-17 21:07:41,744 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 1665 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1696 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:41,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1696 Valid, 1708 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:07:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12893 states. [2021-12-17 21:07:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12893 to 9545. [2021-12-17 21:07:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9545 states, 8625 states have (on average 1.5157101449275363) internal successors, (13073), 8709 states have internal predecessors, (13073), 554 states have call successors, (554), 244 states have call predecessors, (554), 364 states have return successors, (896), 607 states have call predecessors, (896), 551 states have call successors, (896) [2021-12-17 21:07:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9545 states to 9545 states and 14523 transitions. [2021-12-17 21:07:42,513 INFO L78 Accepts]: Start accepts. Automaton has 9545 states and 14523 transitions. Word has length 190 [2021-12-17 21:07:42,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:42,513 INFO L470 AbstractCegarLoop]: Abstraction has 9545 states and 14523 transitions. [2021-12-17 21:07:42,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:42,513 INFO L276 IsEmpty]: Start isEmpty. Operand 9545 states and 14523 transitions. [2021-12-17 21:07:42,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:42,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:42,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:42,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 21:07:42,516 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:42,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:42,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1665019955, now seen corresponding path program 1 times [2021-12-17 21:07:42,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:42,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369447173] [2021-12-17 21:07:42,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:42,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:42,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:42,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:42,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:42,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:42,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:42,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:42,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369447173] [2021-12-17 21:07:42,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369447173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:42,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:42,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:42,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587241549] [2021-12-17 21:07:42,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:42,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:42,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:42,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:42,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:42,627 INFO L87 Difference]: Start difference. First operand 9545 states and 14523 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:44,738 INFO L93 Difference]: Finished difference Result 20147 states and 32135 transitions. [2021-12-17 21:07:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:44,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:44,769 INFO L225 Difference]: With dead ends: 20147 [2021-12-17 21:07:44,770 INFO L226 Difference]: Without dead ends: 12812 [2021-12-17 21:07:44,782 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 [2021-12-17 21:07:44,782 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 1621 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1652 SdHoareTripleChecker+Valid, 1729 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:44,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1652 Valid, 1729 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1406 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:07:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12812 states. [2021-12-17 21:07:45,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12812 to 9545. [2021-12-17 21:07:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9545 states, 8625 states have (on average 1.513855072463768) internal successors, (13057), 8709 states have internal predecessors, (13057), 554 states have call successors, (554), 244 states have call predecessors, (554), 364 states have return successors, (896), 607 states have call predecessors, (896), 551 states have call successors, (896) [2021-12-17 21:07:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9545 states to 9545 states and 14507 transitions. [2021-12-17 21:07:45,452 INFO L78 Accepts]: Start accepts. Automaton has 9545 states and 14507 transitions. Word has length 190 [2021-12-17 21:07:45,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:45,452 INFO L470 AbstractCegarLoop]: Abstraction has 9545 states and 14507 transitions. [2021-12-17 21:07:45,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9545 states and 14507 transitions. [2021-12-17 21:07:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:45,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:45,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:45,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 21:07:45,456 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:45,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1400372465, now seen corresponding path program 1 times [2021-12-17 21:07:45,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:45,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468104542] [2021-12-17 21:07:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:45,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:45,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:45,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:45,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:45,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:45,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:45,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:45,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468104542] [2021-12-17 21:07:45,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468104542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:45,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:45,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:07:45,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059975410] [2021-12-17 21:07:45,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:45,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:07:45,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:45,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:07:45,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:07:45,587 INFO L87 Difference]: Start difference. First operand 9545 states and 14507 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:07:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:50,563 INFO L93 Difference]: Finished difference Result 31919 states and 51385 transitions. [2021-12-17 21:07:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:07:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:50,617 INFO L225 Difference]: With dead ends: 31919 [2021-12-17 21:07:50,617 INFO L226 Difference]: Without dead ends: 24584 [2021-12-17 21:07:50,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:07:50,636 INFO L933 BasicCegarLoop]: 1255 mSDtfsCounter, 2435 mSDsluCounter, 2669 mSDsCounter, 0 mSdLazyCounter, 3411 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2465 SdHoareTripleChecker+Valid, 3924 SdHoareTripleChecker+Invalid, 3586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 3411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:50,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2465 Valid, 3924 Invalid, 3586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 3411 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 21:07:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24584 states. [2021-12-17 21:07:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24584 to 17636. [2021-12-17 21:07:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17636 states, 16130 states have (on average 1.5693118412895226) internal successors, (25313), 16360 states have internal predecessors, (25313), 898 states have call successors, (898), 340 states have call predecessors, (898), 606 states have return successors, (2008), 967 states have call predecessors, (2008), 895 states have call successors, (2008) [2021-12-17 21:07:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17636 states to 17636 states and 28219 transitions. [2021-12-17 21:07:51,904 INFO L78 Accepts]: Start accepts. Automaton has 17636 states and 28219 transitions. Word has length 190 [2021-12-17 21:07:51,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:51,904 INFO L470 AbstractCegarLoop]: Abstraction has 17636 states and 28219 transitions. [2021-12-17 21:07:51,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:07:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 17636 states and 28219 transitions. [2021-12-17 21:07:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:51,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:51,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:51,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 21:07:51,909 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:51,910 INFO L85 PathProgramCache]: Analyzing trace with hash -963469197, now seen corresponding path program 1 times [2021-12-17 21:07:51,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:51,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060263358] [2021-12-17 21:07:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:51,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:51,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:51,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:51,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:52,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:52,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:52,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:52,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060263358] [2021-12-17 21:07:52,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060263358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:52,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:52,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:52,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972209140] [2021-12-17 21:07:52,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:52,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:52,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:52,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:52,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:52,015 INFO L87 Difference]: Start difference. First operand 17636 states and 28219 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:55,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:07:55,226 INFO L93 Difference]: Finished difference Result 40001 states and 66225 transitions. [2021-12-17 21:07:55,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:07:55,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:07:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:07:55,276 INFO L225 Difference]: With dead ends: 40001 [2021-12-17 21:07:55,277 INFO L226 Difference]: Without dead ends: 24575 [2021-12-17 21:07:55,297 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 [2021-12-17 21:07:55,298 INFO L933 BasicCegarLoop]: 754 mSDtfsCounter, 1393 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:07:55,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1424 Valid, 1987 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:07:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24575 states. [2021-12-17 21:07:56,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24575 to 17636. [2021-12-17 21:07:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17636 states, 16130 states have (on average 1.5673279603223806) internal successors, (25281), 16360 states have internal predecessors, (25281), 898 states have call successors, (898), 340 states have call predecessors, (898), 606 states have return successors, (2008), 967 states have call predecessors, (2008), 895 states have call successors, (2008) [2021-12-17 21:07:56,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17636 states to 17636 states and 28187 transitions. [2021-12-17 21:07:56,632 INFO L78 Accepts]: Start accepts. Automaton has 17636 states and 28187 transitions. Word has length 190 [2021-12-17 21:07:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:07:56,632 INFO L470 AbstractCegarLoop]: Abstraction has 17636 states and 28187 transitions. [2021-12-17 21:07:56,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:07:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 17636 states and 28187 transitions. [2021-12-17 21:07:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:07:56,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:07:56,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:07:56,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 21:07:56,638 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:07:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:07:56,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2008319153, now seen corresponding path program 1 times [2021-12-17 21:07:56,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:07:56,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468771412] [2021-12-17 21:07:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:07:56,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:07:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:07:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:07:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:07:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:07:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:07:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:07:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:07:56,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:07:56,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468771412] [2021-12-17 21:07:56,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468771412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:07:56,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:07:56,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:07:56,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539534119] [2021-12-17 21:07:56,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:07:56,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:07:56,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:07:56,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:07:56,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:07:56,749 INFO L87 Difference]: Start difference. First operand 17636 states and 28187 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:08:00,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:00,163 INFO L93 Difference]: Finished difference Result 39515 states and 65157 transitions. [2021-12-17 21:08:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:08:00,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:08:00,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:00,215 INFO L225 Difference]: With dead ends: 39515 [2021-12-17 21:08:00,215 INFO L226 Difference]: Without dead ends: 24089 [2021-12-17 21:08:00,243 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 [2021-12-17 21:08:00,243 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 1390 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1421 SdHoareTripleChecker+Valid, 1981 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:00,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1421 Valid, 1981 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1531 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:08:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24089 states. [2021-12-17 21:08:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24089 to 17636. [2021-12-17 21:08:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17636 states, 16130 states have (on average 1.5653440793552387) internal successors, (25249), 16360 states have internal predecessors, (25249), 898 states have call successors, (898), 340 states have call predecessors, (898), 606 states have return successors, (2008), 967 states have call predecessors, (2008), 895 states have call successors, (2008) [2021-12-17 21:08:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17636 states to 17636 states and 28155 transitions. [2021-12-17 21:08:01,588 INFO L78 Accepts]: Start accepts. Automaton has 17636 states and 28155 transitions. Word has length 190 [2021-12-17 21:08:01,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:01,589 INFO L470 AbstractCegarLoop]: Abstraction has 17636 states and 28155 transitions. [2021-12-17 21:08:01,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:08:01,589 INFO L276 IsEmpty]: Start isEmpty. Operand 17636 states and 28155 transitions. [2021-12-17 21:08:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:08:01,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:01,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:08:01,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 21:08:01,594 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:01,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:01,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1948360593, now seen corresponding path program 1 times [2021-12-17 21:08:01,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:01,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049654969] [2021-12-17 21:08:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:01,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:08:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:08:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:08:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:08:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:01,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:01,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049654969] [2021-12-17 21:08:01,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049654969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:01,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:01,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:08:01,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322822049] [2021-12-17 21:08:01,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:01,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:08:01,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:08:01,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:01,714 INFO L87 Difference]: Start difference. First operand 17636 states and 28155 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:08:08,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:08,501 INFO L93 Difference]: Finished difference Result 61816 states and 102803 transitions. [2021-12-17 21:08:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:08:08,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:08:08,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:08,612 INFO L225 Difference]: With dead ends: 61816 [2021-12-17 21:08:08,612 INFO L226 Difference]: Without dead ends: 46390 [2021-12-17 21:08:08,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:08:08,650 INFO L933 BasicCegarLoop]: 1169 mSDtfsCounter, 2378 mSDsluCounter, 2669 mSDsCounter, 0 mSdLazyCounter, 3200 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2408 SdHoareTripleChecker+Valid, 3838 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 3200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:08,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2408 Valid, 3838 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 3200 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:08:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46390 states. [2021-12-17 21:08:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46390 to 34418. [2021-12-17 21:08:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34418 states, 31594 states have (on average 1.5971070456415775) internal successors, (50459), 32278 states have internal predecessors, (50459), 1570 states have call successors, (1570), 532 states have call predecessors, (1570), 1252 states have return successors, (5752), 1671 states have call predecessors, (5752), 1567 states have call successors, (5752) [2021-12-17 21:08:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34418 states to 34418 states and 57781 transitions. [2021-12-17 21:08:11,383 INFO L78 Accepts]: Start accepts. Automaton has 34418 states and 57781 transitions. Word has length 190 [2021-12-17 21:08:11,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:11,384 INFO L470 AbstractCegarLoop]: Abstraction has 34418 states and 57781 transitions. [2021-12-17 21:08:11,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:08:11,384 INFO L276 IsEmpty]: Start isEmpty. Operand 34418 states and 57781 transitions. [2021-12-17 21:08:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:08:11,392 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:11,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:08:11,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 21:08:11,392 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:11,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1521806095, now seen corresponding path program 1 times [2021-12-17 21:08:11,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:11,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805864809] [2021-12-17 21:08:11,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:11,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:08:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:08:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:08:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:08:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:11,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:11,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805864809] [2021-12-17 21:08:11,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805864809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:11,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:11,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:08:11,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507747746] [2021-12-17 21:08:11,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:11,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:08:11,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:08:11,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:08:11,513 INFO L87 Difference]: Start difference. First operand 34418 states and 57781 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:08:22,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:22,265 INFO L93 Difference]: Finished difference Result 125261 states and 218437 transitions. [2021-12-17 21:08:22,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:08:22,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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 190 [2021-12-17 21:08:22,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:22,516 INFO L225 Difference]: With dead ends: 125261 [2021-12-17 21:08:22,516 INFO L226 Difference]: Without dead ends: 93053 [2021-12-17 21:08:22,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:08:22,642 INFO L933 BasicCegarLoop]: 1089 mSDtfsCounter, 2502 mSDsluCounter, 2669 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2548 SdHoareTripleChecker+Valid, 3758 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:22,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2548 Valid, 3758 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2866 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 21:08:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93053 states. [2021-12-17 21:08:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93053 to 70073. [2021-12-17 21:08:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70073 states, 64159 states have (on average 1.616281425832697) internal successors, (103699), 66237 states have internal predecessors, (103699), 2882 states have call successors, (2882), 916 states have call predecessors, (2882), 3030 states have return successors, (19352), 3047 states have call predecessors, (19352), 2879 states have call successors, (19352) [2021-12-17 21:08:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70073 states to 70073 states and 125933 transitions. [2021-12-17 21:08:28,314 INFO L78 Accepts]: Start accepts. Automaton has 70073 states and 125933 transitions. Word has length 190 [2021-12-17 21:08:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:28,314 INFO L470 AbstractCegarLoop]: Abstraction has 70073 states and 125933 transitions. [2021-12-17 21:08:28,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 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) [2021-12-17 21:08:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 70073 states and 125933 transitions. [2021-12-17 21:08:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:08:28,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:28,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:08:28,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 21:08:28,330 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2062235601, now seen corresponding path program 1 times [2021-12-17 21:08:28,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:28,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986987231] [2021-12-17 21:08:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:28,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:28,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:28,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:08:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:28,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:08:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:28,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:08:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:28,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:08:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:28,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:28,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986987231] [2021-12-17 21:08:28,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986987231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:28,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:28,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:08:28,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762099979] [2021-12-17 21:08:28,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:28,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:08:28,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:08:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:08:28,442 INFO L87 Difference]: Start difference. First operand 70073 states and 125933 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:08:37,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:08:37,815 INFO L93 Difference]: Finished difference Result 165692 states and 306927 transitions. [2021-12-17 21:08:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:08:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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 190 [2021-12-17 21:08:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:08:38,158 INFO L225 Difference]: With dead ends: 165692 [2021-12-17 21:08:38,158 INFO L226 Difference]: Without dead ends: 97829 [2021-12-17 21:08:38,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:08:38,312 INFO L933 BasicCegarLoop]: 731 mSDtfsCounter, 1629 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:08:38,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1660 Valid, 1695 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:08:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97829 states. [2021-12-17 21:08:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97829 to 70073. [2021-12-17 21:08:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70073 states, 64159 states have (on average 1.6142863822690503) internal successors, (103571), 66237 states have internal predecessors, (103571), 2882 states have call successors, (2882), 916 states have call predecessors, (2882), 3030 states have return successors, (19352), 3047 states have call predecessors, (19352), 2879 states have call successors, (19352) [2021-12-17 21:08:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70073 states to 70073 states and 125805 transitions. [2021-12-17 21:08:44,714 INFO L78 Accepts]: Start accepts. Automaton has 70073 states and 125805 transitions. Word has length 190 [2021-12-17 21:08:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:08:44,714 INFO L470 AbstractCegarLoop]: Abstraction has 70073 states and 125805 transitions. [2021-12-17 21:08:44,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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) [2021-12-17 21:08:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 70073 states and 125805 transitions. [2021-12-17 21:08:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 21:08:44,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:08:44,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:08:44,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 21:08:44,729 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:08:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:08:44,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2076751153, now seen corresponding path program 1 times [2021-12-17 21:08:44,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:08:44,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153143280] [2021-12-17 21:08:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:08:44,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:08:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:44,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:08:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:44,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 21:08:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:44,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-17 21:08:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:44,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-17 21:08:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:44,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-17 21:08:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:08:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:08:44,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:08:44,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153143280] [2021-12-17 21:08:44,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153143280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:08:44,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:08:44,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:08:44,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443400377] [2021-12-17 21:08:44,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:08:44,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:08:44,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:08:44,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:08:44,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:08:44,837 INFO L87 Difference]: Start difference. First operand 70073 states and 125805 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 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)