./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.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 2cb37d56f61ec273f723a733aad4526e011a3841f34b26767a03fdc541dd1ee3 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:52:14,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:52:14,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:52:14,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:52:14,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:52:14,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:52:14,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:52:14,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:52:14,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:52:14,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:52:14,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:52:14,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:52:14,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:52:14,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:52:14,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:52:14,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:52:14,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:52:14,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:52:14,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:52:14,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:52:14,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:52:14,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:52:14,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:52:14,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:52:14,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:52:14,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:52:14,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:52:14,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:52:14,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:52:14,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:52:14,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:52:14,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:52:14,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:52:14,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:52:14,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:52:14,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:52:14,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:52:14,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:52:14,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:52:14,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:52:14,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:52:14,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:52:14,281 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:52:14,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:52:14,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:52:14,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:52:14,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:52:14,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:52:14,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:52:14,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:52:14,284 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:52:14,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:52:14,284 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:52:14,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:52:14,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:52:14,285 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:52:14,285 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:52:14,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:52:14,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:52:14,286 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:52:14,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:52:14,286 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:52:14,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:52:14,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:52:14,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:52:14,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:52:14,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:52:14,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:52:14,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:52:14,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:52:14,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:52:14,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:52:14,288 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:52:14,288 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:52:14,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:52:14,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:52:14,288 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2cb37d56f61ec273f723a733aad4526e011a3841f34b26767a03fdc541dd1ee3 [2021-12-21 14:52:14,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:52:14,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:52:14,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:52:14,465 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:52:14,465 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:52:14,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2021-12-21 14:52:14,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f1ab6d0/33dc2b43e7714c49818cb66e25d7f871/FLAG16900a693 [2021-12-21 14:52:14,911 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:52:14,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2021-12-21 14:52:14,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f1ab6d0/33dc2b43e7714c49818cb66e25d7f871/FLAG16900a693 [2021-12-21 14:52:14,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f1ab6d0/33dc2b43e7714c49818cb66e25d7f871 [2021-12-21 14:52:14,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:52:14,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:52:14,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:52:14,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:52:14,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:52:14,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:52:14" (1/1) ... [2021-12-21 14:52:14,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d2c5a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:14, skipping insertion in model container [2021-12-21 14:52:14,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:52:14" (1/1) ... [2021-12-21 14:52:14,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:52:14,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:52:15,111 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.09.cil-1.c[914,927] [2021-12-21 14:52:15,142 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.09.cil-1.c[7115,7128] [2021-12-21 14:52:15,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:52:15,197 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:52:15,204 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.09.cil-1.c[914,927] [2021-12-21 14:52:15,215 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.09.cil-1.c[7115,7128] [2021-12-21 14:52:15,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:52:15,260 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:52:15,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15 WrapperNode [2021-12-21 14:52:15,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:52:15,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:52:15,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:52:15,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:52:15,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15" (1/1) ... [2021-12-21 14:52:15,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15" (1/1) ... [2021-12-21 14:52:15,306 INFO L137 Inliner]: procedures = 71, calls = 84, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 866 [2021-12-21 14:52:15,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:52:15,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:52:15,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:52:15,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:52:15,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15" (1/1) ... [2021-12-21 14:52:15,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15" (1/1) ... [2021-12-21 14:52:15,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15" (1/1) ... [2021-12-21 14:52:15,316 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15" (1/1) ... [2021-12-21 14:52:15,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15" (1/1) ... [2021-12-21 14:52:15,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15" (1/1) ... [2021-12-21 14:52:15,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15" (1/1) ... [2021-12-21 14:52:15,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:52:15,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:52:15,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:52:15,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:52:15,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15" (1/1) ... [2021-12-21 14:52:15,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:52:15,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:52:15,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 14:52:15,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 14:52:15,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:52:15,402 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:52:15,402 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:52:15,402 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-21 14:52:15,403 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-21 14:52:15,403 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:52:15,403 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:52:15,404 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:52:15,404 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:52:15,404 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-21 14:52:15,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-21 14:52:15,404 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:52:15,404 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:52:15,404 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:52:15,404 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:52:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-21 14:52:15,405 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-21 14:52:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-21 14:52:15,405 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-21 14:52:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-21 14:52:15,405 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-21 14:52:15,405 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:52:15,405 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:52:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:52:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:52:15,406 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:52:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-21 14:52:15,406 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-21 14:52:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:52:15,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:52:15,406 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:52:15,407 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:52:15,498 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:52:15,501 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:52:16,079 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:52:16,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:52:16,093 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2021-12-21 14:52:16,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:52:16 BoogieIcfgContainer [2021-12-21 14:52:16,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:52:16,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:52:16,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:52:16,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:52:16,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:52:14" (1/3) ... [2021-12-21 14:52:16,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4548ba3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:52:16, skipping insertion in model container [2021-12-21 14:52:16,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:52:15" (2/3) ... [2021-12-21 14:52:16,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4548ba3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:52:16, skipping insertion in model container [2021-12-21 14:52:16,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:52:16" (3/3) ... [2021-12-21 14:52:16,102 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2021-12-21 14:52:16,107 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:52:16,107 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:52:16,144 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:52:16,148 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 14:52:16,149 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:52:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 408 states, 354 states have (on average 1.6271186440677967) internal successors, (576), 360 states have internal predecessors, (576), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-21 14:52:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:16,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:16,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:16,177 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:16,181 INFO L85 PathProgramCache]: Analyzing trace with hash 398033314, now seen corresponding path program 1 times [2021-12-21 14:52:16,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:16,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789361794] [2021-12-21 14:52:16,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:16,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:16,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:16,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:16,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:16,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:16,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:16,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:16,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:16,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:16,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:16,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789361794] [2021-12-21 14:52:16,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789361794] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:16,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:16,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:52:16,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172643770] [2021-12-21 14:52:16,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:16,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:52:16,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:16,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:52:16,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:52:16,575 INFO L87 Difference]: Start difference. First operand has 408 states, 354 states have (on average 1.6271186440677967) internal successors, (576), 360 states have internal predecessors, (576), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:52:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:17,532 INFO L93 Difference]: Finished difference Result 926 states and 1464 transitions. [2021-12-21 14:52:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-21 14:52:17,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:17,545 INFO L225 Difference]: With dead ends: 926 [2021-12-21 14:52:17,545 INFO L226 Difference]: Without dead ends: 533 [2021-12-21 14:52:17,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:52:17,552 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 733 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 2088 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:17,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 2088 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-12-21 14:52:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 494. [2021-12-21 14:52:17,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 422 states have (on average 1.509478672985782) internal successors, (637), 428 states have internal predecessors, (637), 48 states have call successors, (48), 21 states have call predecessors, (48), 22 states have return successors, (51), 47 states have call predecessors, (51), 46 states have call successors, (51) [2021-12-21 14:52:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 736 transitions. [2021-12-21 14:52:17,621 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 736 transitions. Word has length 65 [2021-12-21 14:52:17,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:17,621 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 736 transitions. [2021-12-21 14:52:17,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:52:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 736 transitions. [2021-12-21 14:52:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:17,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:17,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:17,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:52:17,625 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:17,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:17,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2076921954, now seen corresponding path program 1 times [2021-12-21 14:52:17,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:17,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359445994] [2021-12-21 14:52:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:17,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:17,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:17,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359445994] [2021-12-21 14:52:17,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359445994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:17,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:17,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:52:17,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729265176] [2021-12-21 14:52:17,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:17,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:52:17,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:17,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:52:17,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:52:17,742 INFO L87 Difference]: Start difference. First operand 494 states and 736 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:52:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:18,673 INFO L93 Difference]: Finished difference Result 841 states and 1213 transitions. [2021-12-21 14:52:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 14:52:18,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-21 14:52:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:18,681 INFO L225 Difference]: With dead ends: 841 [2021-12-21 14:52:18,682 INFO L226 Difference]: Without dead ends: 664 [2021-12-21 14:52:18,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-21 14:52:18,685 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 1160 mSDsluCounter, 1685 mSDsCounter, 0 mSdLazyCounter, 1216 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 2352 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:18,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 2352 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1216 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:18,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-21 14:52:18,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 590. [2021-12-21 14:52:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 498 states have (on average 1.4879518072289157) internal successors, (741), 506 states have internal predecessors, (741), 59 states have call successors, (59), 28 states have call predecessors, (59), 31 states have return successors, (70), 59 states have call predecessors, (70), 57 states have call successors, (70) [2021-12-21 14:52:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 870 transitions. [2021-12-21 14:52:18,716 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 870 transitions. Word has length 65 [2021-12-21 14:52:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:18,717 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 870 transitions. [2021-12-21 14:52:18,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:52:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 870 transitions. [2021-12-21 14:52:18,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:18,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:18,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:18,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:52:18,719 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:18,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:18,728 INFO L85 PathProgramCache]: Analyzing trace with hash 48335844, now seen corresponding path program 1 times [2021-12-21 14:52:18,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:18,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481011153] [2021-12-21 14:52:18,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:18,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:18,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:18,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481011153] [2021-12-21 14:52:18,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481011153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:18,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:18,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:52:18,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612152152] [2021-12-21 14:52:18,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:18,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:52:18,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:18,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:52:18,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:52:18,837 INFO L87 Difference]: Start difference. First operand 590 states and 870 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:52:19,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:19,485 INFO L93 Difference]: Finished difference Result 891 states and 1284 transitions. [2021-12-21 14:52:19,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:52:19,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-21 14:52:19,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:19,489 INFO L225 Difference]: With dead ends: 891 [2021-12-21 14:52:19,489 INFO L226 Difference]: Without dead ends: 624 [2021-12-21 14:52:19,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:19,491 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 530 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 2788 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:19,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 2788 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:52:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-12-21 14:52:19,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 595. [2021-12-21 14:52:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 502 states have (on average 1.4800796812749004) internal successors, (743), 510 states have internal predecessors, (743), 59 states have call successors, (59), 28 states have call predecessors, (59), 32 states have return successors, (71), 60 states have call predecessors, (71), 57 states have call successors, (71) [2021-12-21 14:52:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 873 transitions. [2021-12-21 14:52:19,526 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 873 transitions. Word has length 65 [2021-12-21 14:52:19,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:19,526 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 873 transitions. [2021-12-21 14:52:19,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:52:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 873 transitions. [2021-12-21 14:52:19,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:19,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:19,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:19,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:52:19,529 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:19,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:19,530 INFO L85 PathProgramCache]: Analyzing trace with hash -981023454, now seen corresponding path program 1 times [2021-12-21 14:52:19,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:19,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083956927] [2021-12-21 14:52:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:19,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:19,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:19,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:19,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:19,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:19,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:19,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:19,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:19,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083956927] [2021-12-21 14:52:19,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083956927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:19,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:19,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:52:19,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556737291] [2021-12-21 14:52:19,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:19,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:52:19,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:19,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:52:19,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:52:19,615 INFO L87 Difference]: Start difference. First operand 595 states and 873 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:52:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:20,304 INFO L93 Difference]: Finished difference Result 913 states and 1306 transitions. [2021-12-21 14:52:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:52:20,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-21 14:52:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:20,307 INFO L225 Difference]: With dead ends: 913 [2021-12-21 14:52:20,308 INFO L226 Difference]: Without dead ends: 641 [2021-12-21 14:52:20,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:52:20,309 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 789 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:20,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [791 Valid, 2509 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:52:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-12-21 14:52:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 610. [2021-12-21 14:52:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 514 states have (on average 1.4688715953307394) internal successors, (755), 522 states have internal predecessors, (755), 59 states have call successors, (59), 28 states have call predecessors, (59), 35 states have return successors, (74), 63 states have call predecessors, (74), 57 states have call successors, (74) [2021-12-21 14:52:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 888 transitions. [2021-12-21 14:52:20,327 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 888 transitions. Word has length 65 [2021-12-21 14:52:20,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:20,327 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 888 transitions. [2021-12-21 14:52:20,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:52:20,327 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 888 transitions. [2021-12-21 14:52:20,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:20,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:20,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:20,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:52:20,329 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash 405179940, now seen corresponding path program 1 times [2021-12-21 14:52:20,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:20,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91272179] [2021-12-21 14:52:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:20,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:20,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:20,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91272179] [2021-12-21 14:52:20,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91272179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:20,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:20,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:52:20,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462010296] [2021-12-21 14:52:20,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:20,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:52:20,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:52:20,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:52:20,404 INFO L87 Difference]: Start difference. First operand 610 states and 888 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:52:21,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:21,106 INFO L93 Difference]: Finished difference Result 1002 states and 1399 transitions. [2021-12-21 14:52:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 14:52:21,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-21 14:52:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:21,109 INFO L225 Difference]: With dead ends: 1002 [2021-12-21 14:52:21,109 INFO L226 Difference]: Without dead ends: 717 [2021-12-21 14:52:21,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-21 14:52:21,111 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 1193 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:21,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 2105 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 14:52:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-12-21 14:52:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 622. [2021-12-21 14:52:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 524 states have (on average 1.4599236641221374) internal successors, (765), 532 states have internal predecessors, (765), 60 states have call successors, (60), 29 states have call predecessors, (60), 36 states have return successors, (73), 64 states have call predecessors, (73), 58 states have call successors, (73) [2021-12-21 14:52:21,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 898 transitions. [2021-12-21 14:52:21,133 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 898 transitions. Word has length 65 [2021-12-21 14:52:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:21,133 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 898 transitions. [2021-12-21 14:52:21,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:52:21,133 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 898 transitions. [2021-12-21 14:52:21,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 14:52:21,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:21,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:21,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:52:21,135 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:21,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash 271166434, now seen corresponding path program 1 times [2021-12-21 14:52:21,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:21,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229905634] [2021-12-21 14:52:21,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:21,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:21,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:21,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:21,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229905634] [2021-12-21 14:52:21,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229905634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:21,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:21,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:21,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331481138] [2021-12-21 14:52:21,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:21,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:21,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:21,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:21,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:21,195 INFO L87 Difference]: Start difference. First operand 622 states and 898 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:52:21,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:21,518 INFO L93 Difference]: Finished difference Result 1264 states and 1745 transitions. [2021-12-21 14:52:21,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 14:52:21,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-21 14:52:21,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:21,523 INFO L225 Difference]: With dead ends: 1264 [2021-12-21 14:52:21,524 INFO L226 Difference]: Without dead ends: 968 [2021-12-21 14:52:21,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-21 14:52:21,525 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 1457 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:21,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 1438 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:52:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-12-21 14:52:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 912. [2021-12-21 14:52:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 748 states have (on average 1.4064171122994653) internal successors, (1052), 763 states have internal predecessors, (1052), 95 states have call successors, (95), 51 states have call predecessors, (95), 67 states have return successors, (130), 104 states have call predecessors, (130), 93 states have call successors, (130) [2021-12-21 14:52:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1277 transitions. [2021-12-21 14:52:21,573 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1277 transitions. Word has length 65 [2021-12-21 14:52:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:21,573 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1277 transitions. [2021-12-21 14:52:21,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-21 14:52:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1277 transitions. [2021-12-21 14:52:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:52:21,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:21,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:21,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:52:21,575 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:21,576 INFO L85 PathProgramCache]: Analyzing trace with hash 498977079, now seen corresponding path program 1 times [2021-12-21 14:52:21,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:21,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178706090] [2021-12-21 14:52:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:21,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:21,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:21,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178706090] [2021-12-21 14:52:21,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178706090] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:21,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:21,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:21,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139451474] [2021-12-21 14:52:21,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:21,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:21,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:21,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:21,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:21,627 INFO L87 Difference]: Start difference. First operand 912 states and 1277 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:52:22,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:22,042 INFO L93 Difference]: Finished difference Result 2115 states and 2848 transitions. [2021-12-21 14:52:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:52:22,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-21 14:52:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:22,049 INFO L225 Difference]: With dead ends: 2115 [2021-12-21 14:52:22,050 INFO L226 Difference]: Without dead ends: 1508 [2021-12-21 14:52:22,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:52:22,054 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 710 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:22,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 1706 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:52:22,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-12-21 14:52:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1393. [2021-12-21 14:52:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1127 states have (on average 1.360248447204969) internal successors, (1533), 1145 states have internal predecessors, (1533), 140 states have call successors, (140), 95 states have call predecessors, (140), 124 states have return successors, (202), 159 states have call predecessors, (202), 138 states have call successors, (202) [2021-12-21 14:52:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1875 transitions. [2021-12-21 14:52:22,120 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1875 transitions. Word has length 66 [2021-12-21 14:52:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:22,120 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 1875 transitions. [2021-12-21 14:52:22,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:52:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1875 transitions. [2021-12-21 14:52:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 14:52:22,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:22,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:22,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:52:22,126 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:22,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1957216738, now seen corresponding path program 1 times [2021-12-21 14:52:22,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:22,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115437783] [2021-12-21 14:52:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:22,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:22,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:22,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115437783] [2021-12-21 14:52:22,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115437783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:22,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:22,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:22,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318959377] [2021-12-21 14:52:22,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:22,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:22,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:22,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:22,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:22,206 INFO L87 Difference]: Start difference. First operand 1393 states and 1875 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:52:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:22,519 INFO L93 Difference]: Finished difference Result 3581 states and 4681 transitions. [2021-12-21 14:52:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:52:22,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-21 14:52:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:22,528 INFO L225 Difference]: With dead ends: 3581 [2021-12-21 14:52:22,528 INFO L226 Difference]: Without dead ends: 2513 [2021-12-21 14:52:22,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-21 14:52:22,532 INFO L933 BasicCegarLoop]: 594 mSDtfsCounter, 1161 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:22,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 1452 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:52:22,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-12-21 14:52:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2255. [2021-12-21 14:52:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 1793 states have (on average 1.3162297824874511) internal successors, (2360), 1821 states have internal predecessors, (2360), 238 states have call successors, (238), 179 states have call predecessors, (238), 222 states have return successors, (338), 261 states have call predecessors, (338), 236 states have call successors, (338) [2021-12-21 14:52:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 2936 transitions. [2021-12-21 14:52:22,620 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 2936 transitions. Word has length 66 [2021-12-21 14:52:22,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:22,621 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 2936 transitions. [2021-12-21 14:52:22,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 14:52:22,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 2936 transitions. [2021-12-21 14:52:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 14:52:22,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:22,623 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] [2021-12-21 14:52:22,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:52:22,623 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:22,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash 388589846, now seen corresponding path program 1 times [2021-12-21 14:52:22,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:22,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653426059] [2021-12-21 14:52:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:22,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:22,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:22,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:22,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653426059] [2021-12-21 14:52:22,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653426059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:22,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:22,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:22,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021646831] [2021-12-21 14:52:22,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:22,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:22,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:22,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:22,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:22,679 INFO L87 Difference]: Start difference. First operand 2255 states and 2936 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) [2021-12-21 14:52:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:23,002 INFO L93 Difference]: Finished difference Result 5165 states and 6586 transitions. [2021-12-21 14:52:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:52:23,002 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 [2021-12-21 14:52:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:23,012 INFO L225 Difference]: With dead ends: 5165 [2021-12-21 14:52:23,012 INFO L226 Difference]: Without dead ends: 3235 [2021-12-21 14:52:23,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:52:23,016 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 1146 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1176 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:23,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1176 Valid, 1498 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:52:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2021-12-21 14:52:23,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 2987. [2021-12-21 14:52:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2987 states, 2361 states have (on average 1.2977551884794578) internal successors, (3064), 2397 states have internal predecessors, (3064), 318 states have call successors, (318), 249 states have call predecessors, (318), 306 states have return successors, (447), 347 states have call predecessors, (447), 316 states have call successors, (447) [2021-12-21 14:52:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2987 states to 2987 states and 3829 transitions. [2021-12-21 14:52:23,101 INFO L78 Accepts]: Start accepts. Automaton has 2987 states and 3829 transitions. Word has length 72 [2021-12-21 14:52:23,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:23,101 INFO L470 AbstractCegarLoop]: Abstraction has 2987 states and 3829 transitions. [2021-12-21 14:52:23,101 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) [2021-12-21 14:52:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2987 states and 3829 transitions. [2021-12-21 14:52:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 14:52:23,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:23,103 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:23,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:52:23,103 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1355326336, now seen corresponding path program 1 times [2021-12-21 14:52:23,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:23,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524269194] [2021-12-21 14:52:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:23,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:23,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:23,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524269194] [2021-12-21 14:52:23,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524269194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:23,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:23,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:23,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368787503] [2021-12-21 14:52:23,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:23,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:23,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:23,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:23,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:23,159 INFO L87 Difference]: Start difference. First operand 2987 states and 3829 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 14:52:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:23,780 INFO L93 Difference]: Finished difference Result 3761 states and 4760 transitions. [2021-12-21 14:52:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 14:52:23,781 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-21 14:52:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:23,793 INFO L225 Difference]: With dead ends: 3761 [2021-12-21 14:52:23,793 INFO L226 Difference]: Without dead ends: 3758 [2021-12-21 14:52:23,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-21 14:52:23,795 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 2030 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:23,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2040 Valid, 1188 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:52:23,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3758 states. [2021-12-21 14:52:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3758 to 3481. [2021-12-21 14:52:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 2746 states have (on average 1.2876911871813548) internal successors, (3536), 2787 states have internal predecessors, (3536), 368 states have call successors, (368), 293 states have call predecessors, (368), 365 states have return successors, (526), 407 states have call predecessors, (526), 367 states have call successors, (526) [2021-12-21 14:52:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 4430 transitions. [2021-12-21 14:52:24,017 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 4430 transitions. Word has length 73 [2021-12-21 14:52:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:24,017 INFO L470 AbstractCegarLoop]: Abstraction has 3481 states and 4430 transitions. [2021-12-21 14:52:24,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 14:52:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 4430 transitions. [2021-12-21 14:52:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 14:52:24,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:24,035 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:24,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:52:24,036 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:24,036 INFO L85 PathProgramCache]: Analyzing trace with hash 933342880, now seen corresponding path program 1 times [2021-12-21 14:52:24,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:24,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409487172] [2021-12-21 14:52:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:24,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:24,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:24,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:24,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:24,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:24,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:24,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:24,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:24,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:24,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409487172] [2021-12-21 14:52:24,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409487172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:52:24,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430125565] [2021-12-21 14:52:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:24,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:52:24,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:52:24,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:52:24,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:52:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:24,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 14:52:24,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:52:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:24,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:52:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:24,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430125565] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:52:24,823 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:52:24,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-21 14:52:24,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876023362] [2021-12-21 14:52:24,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:52:24,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:52:24,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:24,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:52:24,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:52:24,825 INFO L87 Difference]: Start difference. First operand 3481 states and 4430 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-21 14:52:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:26,286 INFO L93 Difference]: Finished difference Result 7922 states and 9916 transitions. [2021-12-21 14:52:26,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 14:52:26,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-21 14:52:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:26,312 INFO L225 Difference]: With dead ends: 7922 [2021-12-21 14:52:26,313 INFO L226 Difference]: Without dead ends: 7919 [2021-12-21 14:52:26,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-21 14:52:26,317 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2028 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:26,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2097 Valid, 2482 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 14:52:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7919 states. [2021-12-21 14:52:26,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7919 to 5271. [2021-12-21 14:52:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5271 states, 4150 states have (on average 1.28) internal successors, (5312), 4213 states have internal predecessors, (5312), 552 states have call successors, (552), 451 states have call predecessors, (552), 567 states have return successors, (804), 613 states have call predecessors, (804), 551 states have call successors, (804) [2021-12-21 14:52:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5271 states to 5271 states and 6668 transitions. [2021-12-21 14:52:26,585 INFO L78 Accepts]: Start accepts. Automaton has 5271 states and 6668 transitions. Word has length 74 [2021-12-21 14:52:26,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:26,585 INFO L470 AbstractCegarLoop]: Abstraction has 5271 states and 6668 transitions. [2021-12-21 14:52:26,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-21 14:52:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 5271 states and 6668 transitions. [2021-12-21 14:52:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 14:52:26,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:26,588 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:26,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 14:52:26,806 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,SelfDestructingSolverStorable10 [2021-12-21 14:52:26,806 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:26,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:26,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1804001536, now seen corresponding path program 2 times [2021-12-21 14:52:26,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:26,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479305930] [2021-12-21 14:52:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:26,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:26,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:26,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479305930] [2021-12-21 14:52:26,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479305930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:26,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:26,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:26,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75045718] [2021-12-21 14:52:26,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:26,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:26,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:26,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:26,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:26,865 INFO L87 Difference]: Start difference. First operand 5271 states and 6668 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 14:52:27,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:27,321 INFO L93 Difference]: Finished difference Result 7953 states and 10041 transitions. [2021-12-21 14:52:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 14:52:27,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-21 14:52:27,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:27,335 INFO L225 Difference]: With dead ends: 7953 [2021-12-21 14:52:27,335 INFO L226 Difference]: Without dead ends: 3878 [2021-12-21 14:52:27,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:52:27,343 INFO L933 BasicCegarLoop]: 653 mSDtfsCounter, 1066 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:27,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1099 Valid, 1608 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:52:27,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-12-21 14:52:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 3643. [2021-12-21 14:52:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3643 states, 2878 states have (on average 1.2689367616400278) internal successors, (3652), 2919 states have internal predecessors, (3652), 384 states have call successors, (384), 307 states have call predecessors, (384), 379 states have return successors, (530), 423 states have call predecessors, (530), 383 states have call successors, (530) [2021-12-21 14:52:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3643 states to 3643 states and 4566 transitions. [2021-12-21 14:52:27,478 INFO L78 Accepts]: Start accepts. Automaton has 3643 states and 4566 transitions. Word has length 77 [2021-12-21 14:52:27,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:27,478 INFO L470 AbstractCegarLoop]: Abstraction has 3643 states and 4566 transitions. [2021-12-21 14:52:27,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 14:52:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3643 states and 4566 transitions. [2021-12-21 14:52:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 14:52:27,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:27,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:27,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:52:27,481 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1529654834, now seen corresponding path program 1 times [2021-12-21 14:52:27,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:27,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662945686] [2021-12-21 14:52:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:27,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 14:52:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 14:52:27,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:27,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662945686] [2021-12-21 14:52:27,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662945686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:27,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:27,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:52:27,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736558758] [2021-12-21 14:52:27,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:27,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:52:27,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:52:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:52:27,543 INFO L87 Difference]: Start difference. First operand 3643 states and 4566 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:52:28,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:28,572 INFO L93 Difference]: Finished difference Result 10515 states and 12983 transitions. [2021-12-21 14:52:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 14:52:28,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-21 14:52:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:28,600 INFO L225 Difference]: With dead ends: 10515 [2021-12-21 14:52:28,600 INFO L226 Difference]: Without dead ends: 5878 [2021-12-21 14:52:28,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-21 14:52:28,608 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 1556 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:28,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1572 Valid, 1856 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-12-21 14:52:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 5558. [2021-12-21 14:52:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5558 states, 4336 states have (on average 1.2396217712177122) internal successors, (5375), 4420 states have internal predecessors, (5375), 588 states have call successors, (588), 481 states have call predecessors, (588), 632 states have return successors, (912), 663 states have call predecessors, (912), 587 states have call successors, (912) [2021-12-21 14:52:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 6875 transitions. [2021-12-21 14:52:28,849 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 6875 transitions. Word has length 84 [2021-12-21 14:52:28,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:28,849 INFO L470 AbstractCegarLoop]: Abstraction has 5558 states and 6875 transitions. [2021-12-21 14:52:28,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:52:28,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 6875 transitions. [2021-12-21 14:52:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 14:52:28,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:28,852 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:28,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:52:28,853 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:28,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1318594338, now seen corresponding path program 1 times [2021-12-21 14:52:28,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:28,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324189083] [2021-12-21 14:52:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:28,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:28,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:28,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:28,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:28,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:28,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:28,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:28,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-21 14:52:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 14:52:28,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:28,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324189083] [2021-12-21 14:52:28,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324189083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:28,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:28,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:52:28,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125180568] [2021-12-21 14:52:28,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:28,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:52:28,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:28,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:52:28,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:52:28,939 INFO L87 Difference]: Start difference. First operand 5558 states and 6875 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:52:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:30,154 INFO L93 Difference]: Finished difference Result 9561 states and 11715 transitions. [2021-12-21 14:52:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 14:52:30,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-21 14:52:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:30,167 INFO L225 Difference]: With dead ends: 9561 [2021-12-21 14:52:30,168 INFO L226 Difference]: Without dead ends: 4968 [2021-12-21 14:52:30,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-21 14:52:30,176 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 2121 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2164 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:30,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2164 Valid, 2164 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:52:30,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4968 states. [2021-12-21 14:52:30,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4968 to 4634. [2021-12-21 14:52:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4634 states, 3625 states have (on average 1.234206896551724) internal successors, (4474), 3691 states have internal predecessors, (4474), 489 states have call successors, (489), 396 states have call predecessors, (489), 518 states have return successors, (690), 553 states have call predecessors, (690), 488 states have call successors, (690) [2021-12-21 14:52:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 5653 transitions. [2021-12-21 14:52:30,339 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 5653 transitions. Word has length 93 [2021-12-21 14:52:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:30,339 INFO L470 AbstractCegarLoop]: Abstraction has 4634 states and 5653 transitions. [2021-12-21 14:52:30,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 14:52:30,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 5653 transitions. [2021-12-21 14:52:30,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:30,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:30,344 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:52:30,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:52:30,344 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:30,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:30,345 INFO L85 PathProgramCache]: Analyzing trace with hash -162152600, now seen corresponding path program 1 times [2021-12-21 14:52:30,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:30,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309925874] [2021-12-21 14:52:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:30,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 14:52:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 14:52:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-21 14:52:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 14:52:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 14:52:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-21 14:52:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 14:52:30,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:30,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309925874] [2021-12-21 14:52:30,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309925874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:52:30,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538251754] [2021-12-21 14:52:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:30,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:52:30,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:52:30,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:52:30,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:52:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:30,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 14:52:30,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:52:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 14:52:30,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:52:30,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538251754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:30,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:52:30,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-21 14:52:30,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515187102] [2021-12-21 14:52:30,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:30,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:30,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:30,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:30,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-21 14:52:30,806 INFO L87 Difference]: Start difference. First operand 4634 states and 5653 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 14:52:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:30,910 INFO L93 Difference]: Finished difference Result 6800 states and 8276 transitions. [2021-12-21 14:52:30,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:30,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-21 14:52:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:30,920 INFO L225 Difference]: With dead ends: 6800 [2021-12-21 14:52:30,920 INFO L226 Difference]: Without dead ends: 2495 [2021-12-21 14:52:30,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-21 14:52:30,930 INFO L933 BasicCegarLoop]: 601 mSDtfsCounter, 34 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 2968 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:30,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 2968 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:52:30,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-12-21 14:52:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2370. [2021-12-21 14:52:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 1938 states have (on average 1.2487100103199174) internal successors, (2420), 1953 states have internal predecessors, (2420), 213 states have call successors, (213), 162 states have call predecessors, (213), 217 states have return successors, (297), 255 states have call predecessors, (297), 212 states have call successors, (297) [2021-12-21 14:52:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 2930 transitions. [2021-12-21 14:52:31,008 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 2930 transitions. Word has length 145 [2021-12-21 14:52:31,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:31,009 INFO L470 AbstractCegarLoop]: Abstraction has 2370 states and 2930 transitions. [2021-12-21 14:52:31,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 14:52:31,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 2930 transitions. [2021-12-21 14:52:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-21 14:52:31,013 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:31,013 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] [2021-12-21 14:52:31,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 14:52:31,226 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,SelfDestructingSolverStorable14 [2021-12-21 14:52:31,227 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:31,227 INFO L85 PathProgramCache]: Analyzing trace with hash -35746380, now seen corresponding path program 1 times [2021-12-21 14:52:31,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:31,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421414572] [2021-12-21 14:52:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:31,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-21 14:52:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-21 14:52:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:52:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-21 14:52:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 14:52:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 14:52:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 14:52:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 14:52:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 14:52:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:52:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-21 14:52:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-21 14:52:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-21 14:52:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-21 14:52:31,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:31,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421414572] [2021-12-21 14:52:31,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421414572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:31,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:31,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:31,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510601561] [2021-12-21 14:52:31,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:31,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:31,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:31,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:31,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:31,347 INFO L87 Difference]: Start difference. First operand 2370 states and 2930 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) [2021-12-21 14:52:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:31,922 INFO L93 Difference]: Finished difference Result 2435 states and 2998 transitions. [2021-12-21 14:52:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:31,922 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 [2021-12-21 14:52:31,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:31,927 INFO L225 Difference]: With dead ends: 2435 [2021-12-21 14:52:31,927 INFO L226 Difference]: Without dead ends: 1992 [2021-12-21 14:52:31,928 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 [2021-12-21 14:52:31,928 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 631 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:31,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [646 Valid, 1634 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 14:52:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-12-21 14:52:31,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1930. [2021-12-21 14:52:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1594 states have (on average 1.2647427854454203) internal successors, (2016), 1606 states have internal predecessors, (2016), 167 states have call successors, (167), 122 states have call predecessors, (167), 167 states have return successors, (233), 202 states have call predecessors, (233), 166 states have call successors, (233) [2021-12-21 14:52:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2416 transitions. [2021-12-21 14:52:31,989 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2416 transitions. Word has length 147 [2021-12-21 14:52:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:31,990 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 2416 transitions. [2021-12-21 14:52:31,990 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) [2021-12-21 14:52:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2416 transitions. [2021-12-21 14:52:31,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:31,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:31,993 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] [2021-12-21 14:52:31,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:52:31,993 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:31,993 INFO L85 PathProgramCache]: Analyzing trace with hash -854471620, now seen corresponding path program 1 times [2021-12-21 14:52:31,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:31,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552026531] [2021-12-21 14:52:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:31,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:32,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:32,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:52:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:32,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:52:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:32,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:32,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:52:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:32,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:32,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552026531] [2021-12-21 14:52:32,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552026531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:32,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:32,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:52:32,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074735513] [2021-12-21 14:52:32,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:32,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:52:32,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:32,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:52:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:52:32,064 INFO L87 Difference]: Start difference. First operand 1930 states and 2416 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:32,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:32,974 INFO L93 Difference]: Finished difference Result 2333 states and 3064 transitions. [2021-12-21 14:52:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:52:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:32,979 INFO L225 Difference]: With dead ends: 2333 [2021-12-21 14:52:32,979 INFO L226 Difference]: Without dead ends: 2039 [2021-12-21 14:52:32,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:52:32,981 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 907 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 1149 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:32,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 1149 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:52:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-12-21 14:52:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1930. [2021-12-21 14:52:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1594 states have (on average 1.2641154328732749) internal successors, (2015), 1606 states have internal predecessors, (2015), 167 states have call successors, (167), 122 states have call predecessors, (167), 167 states have return successors, (233), 202 states have call predecessors, (233), 166 states have call successors, (233) [2021-12-21 14:52:33,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2415 transitions. [2021-12-21 14:52:33,096 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2415 transitions. Word has length 145 [2021-12-21 14:52:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:33,096 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 2415 transitions. [2021-12-21 14:52:33,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2415 transitions. [2021-12-21 14:52:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:33,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:33,100 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] [2021-12-21 14:52:33,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:52:33,101 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:33,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2041542074, now seen corresponding path program 1 times [2021-12-21 14:52:33,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:33,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004516965] [2021-12-21 14:52:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:33,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:52:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:52:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:52:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:33,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:33,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004516965] [2021-12-21 14:52:33,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004516965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:33,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:33,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:52:33,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122288033] [2021-12-21 14:52:33,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:33,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:52:33,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:33,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:52:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:52:33,184 INFO L87 Difference]: Start difference. First operand 1930 states and 2415 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:35,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:35,056 INFO L93 Difference]: Finished difference Result 2730 states and 3702 transitions. [2021-12-21 14:52:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:52:35,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:52:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:35,061 INFO L225 Difference]: With dead ends: 2730 [2021-12-21 14:52:35,061 INFO L226 Difference]: Without dead ends: 2445 [2021-12-21 14:52:35,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:52:35,063 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1423 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1449 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:35,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1449 Valid, 1638 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 14:52:35,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-12-21 14:52:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2228. [2021-12-21 14:52:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 1867 states have (on average 1.3111944295661488) internal successors, (2448), 1880 states have internal predecessors, (2448), 185 states have call successors, (185), 128 states have call predecessors, (185), 174 states have return successors, (254), 220 states have call predecessors, (254), 184 states have call successors, (254) [2021-12-21 14:52:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2887 transitions. [2021-12-21 14:52:35,159 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2887 transitions. Word has length 145 [2021-12-21 14:52:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:35,159 INFO L470 AbstractCegarLoop]: Abstraction has 2228 states and 2887 transitions. [2021-12-21 14:52:35,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2887 transitions. [2021-12-21 14:52:35,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:35,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:35,162 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] [2021-12-21 14:52:35,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:52:35,162 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1334945468, now seen corresponding path program 1 times [2021-12-21 14:52:35,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:35,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761593930] [2021-12-21 14:52:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:35,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:52:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:52:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:52:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:35,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:35,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761593930] [2021-12-21 14:52:35,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761593930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:35,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:35,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:35,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161367728] [2021-12-21 14:52:35,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:35,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:35,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:35,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:35,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:35,255 INFO L87 Difference]: Start difference. First operand 2228 states and 2887 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:37,044 INFO L93 Difference]: Finished difference Result 3448 states and 4849 transitions. [2021-12-21 14:52:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:52:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:37,051 INFO L225 Difference]: With dead ends: 3448 [2021-12-21 14:52:37,051 INFO L226 Difference]: Without dead ends: 2865 [2021-12-21 14:52:37,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:37,053 INFO L933 BasicCegarLoop]: 909 mSDtfsCounter, 1440 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 2577 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 2663 SdHoareTripleChecker+Invalid, 2680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:37,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1466 Valid, 2663 Invalid, 2680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2577 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:52:37,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-12-21 14:52:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2505. [2021-12-21 14:52:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2119 states have (on average 1.339782916470033) internal successors, (2839), 2133 states have internal predecessors, (2839), 203 states have call successors, (203), 134 states have call predecessors, (203), 181 states have return successors, (274), 239 states have call predecessors, (274), 202 states have call successors, (274) [2021-12-21 14:52:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3316 transitions. [2021-12-21 14:52:37,263 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3316 transitions. Word has length 145 [2021-12-21 14:52:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:37,264 INFO L470 AbstractCegarLoop]: Abstraction has 2505 states and 3316 transitions. [2021-12-21 14:52:37,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:37,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3316 transitions. [2021-12-21 14:52:37,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:37,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:37,267 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] [2021-12-21 14:52:37,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:52:37,267 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:37,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2012983942, now seen corresponding path program 1 times [2021-12-21 14:52:37,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:37,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745695512] [2021-12-21 14:52:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:37,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:52:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:52:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:52:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:37,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745695512] [2021-12-21 14:52:37,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745695512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:37,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:37,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:37,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247942559] [2021-12-21 14:52:37,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:37,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:37,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:37,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:37,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:37,360 INFO L87 Difference]: Start difference. First operand 2505 states and 3316 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:39,439 INFO L93 Difference]: Finished difference Result 4506 states and 6526 transitions. [2021-12-21 14:52:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:39,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:52:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:39,447 INFO L225 Difference]: With dead ends: 4506 [2021-12-21 14:52:39,447 INFO L226 Difference]: Without dead ends: 3646 [2021-12-21 14:52:39,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:39,452 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 1437 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 2583 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:39,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1463 Valid, 2651 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2583 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 14:52:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2021-12-21 14:52:39,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 3060. [2021-12-21 14:52:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 2624 states have (on average 1.3803353658536586) internal successors, (3622), 2640 states have internal predecessors, (3622), 239 states have call successors, (239), 146 states have call predecessors, (239), 195 states have return successors, (318), 277 states have call predecessors, (318), 238 states have call successors, (318) [2021-12-21 14:52:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 4179 transitions. [2021-12-21 14:52:39,584 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 4179 transitions. Word has length 145 [2021-12-21 14:52:39,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:39,584 INFO L470 AbstractCegarLoop]: Abstraction has 3060 states and 4179 transitions. [2021-12-21 14:52:39,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 4179 transitions. [2021-12-21 14:52:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:39,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:39,587 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] [2021-12-21 14:52:39,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:52:39,588 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:39,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1151150340, now seen corresponding path program 1 times [2021-12-21 14:52:39,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:39,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220865843] [2021-12-21 14:52:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:39,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:39,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:39,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:52:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:39,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:52:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:39,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:39,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:52:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:39,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:39,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220865843] [2021-12-21 14:52:39,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220865843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:39,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:39,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:39,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820852966] [2021-12-21 14:52:39,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:39,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:39,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:39,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:39,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:39,706 INFO L87 Difference]: Start difference. First operand 3060 states and 4179 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:42,074 INFO L93 Difference]: Finished difference Result 6541 states and 9733 transitions. [2021-12-21 14:52:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:42,074 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:52:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:42,120 INFO L225 Difference]: With dead ends: 6541 [2021-12-21 14:52:42,120 INFO L226 Difference]: Without dead ends: 5126 [2021-12-21 14:52:42,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:42,127 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 1433 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2647 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:42,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 2647 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 14:52:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-12-21 14:52:42,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4171. [2021-12-21 14:52:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4171 states, 3635 states have (on average 1.427235213204952) internal successors, (5188), 3655 states have internal predecessors, (5188), 311 states have call successors, (311), 170 states have call predecessors, (311), 223 states have return successors, (412), 353 states have call predecessors, (412), 310 states have call successors, (412) [2021-12-21 14:52:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4171 states to 4171 states and 5911 transitions. [2021-12-21 14:52:42,393 INFO L78 Accepts]: Start accepts. Automaton has 4171 states and 5911 transitions. Word has length 145 [2021-12-21 14:52:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:42,393 INFO L470 AbstractCegarLoop]: Abstraction has 4171 states and 5911 transitions. [2021-12-21 14:52:42,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4171 states and 5911 transitions. [2021-12-21 14:52:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:42,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:42,399 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] [2021-12-21 14:52:42,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:52:42,400 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1093408058, now seen corresponding path program 1 times [2021-12-21 14:52:42,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:42,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403404064] [2021-12-21 14:52:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:42,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:42,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:42,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:52:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:42,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:52:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:42,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:42,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:52:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:42,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:42,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403404064] [2021-12-21 14:52:42,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403404064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:42,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:42,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:42,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319323444] [2021-12-21 14:52:42,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:42,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:42,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:42,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:42,490 INFO L87 Difference]: Start difference. First operand 4171 states and 5911 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:45,051 INFO L93 Difference]: Finished difference Result 10610 states and 16163 transitions. [2021-12-21 14:52:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:45,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:52:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:45,068 INFO L225 Difference]: With dead ends: 10610 [2021-12-21 14:52:45,068 INFO L226 Difference]: Without dead ends: 8084 [2021-12-21 14:52:45,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:45,075 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 1429 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 2573 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:45,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 2643 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2573 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 14:52:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2021-12-21 14:52:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 6398. [2021-12-21 14:52:45,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6398 states, 5662 states have (on average 1.4705051218650653) internal successors, (8326), 5690 states have internal predecessors, (8326), 455 states have call successors, (455), 218 states have call predecessors, (455), 279 states have return successors, (618), 505 states have call predecessors, (618), 454 states have call successors, (618) [2021-12-21 14:52:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6398 states to 6398 states and 9399 transitions. [2021-12-21 14:52:45,493 INFO L78 Accepts]: Start accepts. Automaton has 6398 states and 9399 transitions. Word has length 145 [2021-12-21 14:52:45,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:45,493 INFO L470 AbstractCegarLoop]: Abstraction has 6398 states and 9399 transitions. [2021-12-21 14:52:45,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 6398 states and 9399 transitions. [2021-12-21 14:52:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:45,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:45,499 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] [2021-12-21 14:52:45,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 14:52:45,499 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:45,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:45,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1581455164, now seen corresponding path program 1 times [2021-12-21 14:52:45,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:45,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971389207] [2021-12-21 14:52:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:45,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:52:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:52:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:52:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:45,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:45,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971389207] [2021-12-21 14:52:45,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971389207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:45,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:45,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:45,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715329309] [2021-12-21 14:52:45,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:45,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:45,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:45,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:45,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:45,602 INFO L87 Difference]: Start difference. First operand 6398 states and 9399 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:47,142 INFO L93 Difference]: Finished difference Result 12915 states and 19874 transitions. [2021-12-21 14:52:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:47,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:52:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:47,162 INFO L225 Difference]: With dead ends: 12915 [2021-12-21 14:52:47,162 INFO L226 Difference]: Without dead ends: 8162 [2021-12-21 14:52:47,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:52:47,173 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 1090 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:47,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1117 Valid, 1559 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:52:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8162 states. [2021-12-21 14:52:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8162 to 6398. [2021-12-21 14:52:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6398 states, 5662 states have (on average 1.467502649240551) internal successors, (8309), 5690 states have internal predecessors, (8309), 455 states have call successors, (455), 218 states have call predecessors, (455), 279 states have return successors, (618), 505 states have call predecessors, (618), 454 states have call successors, (618) [2021-12-21 14:52:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6398 states to 6398 states and 9382 transitions. [2021-12-21 14:52:47,554 INFO L78 Accepts]: Start accepts. Automaton has 6398 states and 9382 transitions. Word has length 145 [2021-12-21 14:52:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:47,554 INFO L470 AbstractCegarLoop]: Abstraction has 6398 states and 9382 transitions. [2021-12-21 14:52:47,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 6398 states and 9382 transitions. [2021-12-21 14:52:47,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:47,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:47,559 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] [2021-12-21 14:52:47,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 14:52:47,560 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:47,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:47,560 INFO L85 PathProgramCache]: Analyzing trace with hash 488819962, now seen corresponding path program 1 times [2021-12-21 14:52:47,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:47,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908597213] [2021-12-21 14:52:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:47,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:52:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:52:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:52:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:47,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908597213] [2021-12-21 14:52:47,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908597213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:47,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:47,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:47,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074837487] [2021-12-21 14:52:47,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:47,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:47,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:47,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:47,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:47,657 INFO L87 Difference]: Start difference. First operand 6398 states and 9382 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:49,139 INFO L93 Difference]: Finished difference Result 12897 states and 19788 transitions. [2021-12-21 14:52:49,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:49,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:52:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:49,156 INFO L225 Difference]: With dead ends: 12897 [2021-12-21 14:52:49,156 INFO L226 Difference]: Without dead ends: 8144 [2021-12-21 14:52:49,166 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 [2021-12-21 14:52:49,166 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 1272 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:49,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1299 Valid, 1346 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 14:52:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8144 states. [2021-12-21 14:52:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8144 to 6398. [2021-12-21 14:52:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6398 states, 5662 states have (on average 1.4645001766160368) internal successors, (8292), 5690 states have internal predecessors, (8292), 455 states have call successors, (455), 218 states have call predecessors, (455), 279 states have return successors, (618), 505 states have call predecessors, (618), 454 states have call successors, (618) [2021-12-21 14:52:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6398 states to 6398 states and 9365 transitions. [2021-12-21 14:52:49,507 INFO L78 Accepts]: Start accepts. Automaton has 6398 states and 9365 transitions. Word has length 145 [2021-12-21 14:52:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:49,507 INFO L470 AbstractCegarLoop]: Abstraction has 6398 states and 9365 transitions. [2021-12-21 14:52:49,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 6398 states and 9365 transitions. [2021-12-21 14:52:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:49,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:49,512 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] [2021-12-21 14:52:49,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 14:52:49,512 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:49,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:49,513 INFO L85 PathProgramCache]: Analyzing trace with hash -793352324, now seen corresponding path program 1 times [2021-12-21 14:52:49,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:49,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962938620] [2021-12-21 14:52:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:49,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:49,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:49,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:52:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:49,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:52:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:49,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:49,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:52:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:49,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:49,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962938620] [2021-12-21 14:52:49,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962938620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:49,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:49,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:49,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48468467] [2021-12-21 14:52:49,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:49,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:49,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:49,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:49,605 INFO L87 Difference]: Start difference. First operand 6398 states and 9365 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:52,233 INFO L93 Difference]: Finished difference Result 18692 states and 28809 transitions. [2021-12-21 14:52:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:52:52,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:52:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:52,268 INFO L225 Difference]: With dead ends: 18692 [2021-12-21 14:52:52,268 INFO L226 Difference]: Without dead ends: 13939 [2021-12-21 14:52:52,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:52:52,281 INFO L933 BasicCegarLoop]: 685 mSDtfsCounter, 1496 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:52,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1522 Valid, 1932 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 14:52:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13939 states. [2021-12-21 14:52:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13939 to 10914. [2021-12-21 14:52:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10914 states, 9778 states have (on average 1.4953978318674574) internal successors, (14622), 9822 states have internal predecessors, (14622), 743 states have call successors, (743), 314 states have call predecessors, (743), 391 states have return successors, (1084), 809 states have call predecessors, (1084), 742 states have call successors, (1084) [2021-12-21 14:52:52,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10914 states to 10914 states and 16449 transitions. [2021-12-21 14:52:52,999 INFO L78 Accepts]: Start accepts. Automaton has 10914 states and 16449 transitions. Word has length 145 [2021-12-21 14:52:52,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:52,999 INFO L470 AbstractCegarLoop]: Abstraction has 10914 states and 16449 transitions. [2021-12-21 14:52:53,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:53,000 INFO L276 IsEmpty]: Start isEmpty. Operand 10914 states and 16449 transitions. [2021-12-21 14:52:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:53,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:53,006 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] [2021-12-21 14:52:53,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 14:52:53,007 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:53,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1779612286, now seen corresponding path program 1 times [2021-12-21 14:52:53,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:53,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305689060] [2021-12-21 14:52:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:53,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:52:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:52:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:52:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:53,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:53,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305689060] [2021-12-21 14:52:53,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305689060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:53,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:53,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:53,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988050229] [2021-12-21 14:52:53,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:53,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:53,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:53,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:53,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:53,107 INFO L87 Difference]: Start difference. First operand 10914 states and 16449 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:54,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:52:54,933 INFO L93 Difference]: Finished difference Result 23347 states and 36376 transitions. [2021-12-21 14:52:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:52:54,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:52:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:52:54,971 INFO L225 Difference]: With dead ends: 23347 [2021-12-21 14:52:54,972 INFO L226 Difference]: Without dead ends: 14078 [2021-12-21 14:52:54,989 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 [2021-12-21 14:52:54,990 INFO L933 BasicCegarLoop]: 596 mSDtfsCounter, 1269 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:52:54,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1296 Valid, 1337 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:52:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14078 states. [2021-12-21 14:52:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14078 to 10914. [2021-12-21 14:52:55,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10914 states, 9778 states have (on average 1.4920229085702599) internal successors, (14589), 9822 states have internal predecessors, (14589), 743 states have call successors, (743), 314 states have call predecessors, (743), 391 states have return successors, (1084), 809 states have call predecessors, (1084), 742 states have call successors, (1084) [2021-12-21 14:52:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10914 states to 10914 states and 16416 transitions. [2021-12-21 14:52:55,834 INFO L78 Accepts]: Start accepts. Automaton has 10914 states and 16416 transitions. Word has length 145 [2021-12-21 14:52:55,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:52:55,835 INFO L470 AbstractCegarLoop]: Abstraction has 10914 states and 16416 transitions. [2021-12-21 14:52:55,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:52:55,835 INFO L276 IsEmpty]: Start isEmpty. Operand 10914 states and 16416 transitions. [2021-12-21 14:52:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:52:55,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:52:55,841 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] [2021-12-21 14:52:55,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-21 14:52:55,842 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:52:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:52:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1446969148, now seen corresponding path program 1 times [2021-12-21 14:52:55,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:52:55,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860028325] [2021-12-21 14:52:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:52:55,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:52:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:55,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:52:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:55,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:52:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:55,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:52:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:55,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:52:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:55,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:52:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:52:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:52:55,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:52:55,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860028325] [2021-12-21 14:52:55,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860028325] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:52:55,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:52:55,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:52:55,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905224039] [2021-12-21 14:52:55,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:52:55,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:52:55,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:52:55,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:52:55,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:52:55,959 INFO L87 Difference]: Start difference. First operand 10914 states and 16416 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:00,996 INFO L93 Difference]: Finished difference Result 39252 states and 61013 transitions. [2021-12-21 14:53:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:53:00,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:53:00,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:01,077 INFO L225 Difference]: With dead ends: 39252 [2021-12-21 14:53:01,078 INFO L226 Difference]: Without dead ends: 29983 [2021-12-21 14:53:01,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:53:01,101 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 1496 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 2921 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 2752 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:01,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 2752 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2921 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 14:53:01,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29983 states. [2021-12-21 14:53:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29983 to 19908. [2021-12-21 14:53:02,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19908 states, 18004 states have (on average 1.511941790713175) internal successors, (27221), 18080 states have internal predecessors, (27221), 1287 states have call successors, (1287), 506 states have call predecessors, (1287), 615 states have return successors, (2146), 1385 states have call predecessors, (2146), 1286 states have call successors, (2146) [2021-12-21 14:53:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19908 states to 19908 states and 30654 transitions. [2021-12-21 14:53:02,679 INFO L78 Accepts]: Start accepts. Automaton has 19908 states and 30654 transitions. Word has length 145 [2021-12-21 14:53:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:02,680 INFO L470 AbstractCegarLoop]: Abstraction has 19908 states and 30654 transitions. [2021-12-21 14:53:02,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 19908 states and 30654 transitions. [2021-12-21 14:53:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:53:02,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:02,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:53:02,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 14:53:02,690 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash -919065922, now seen corresponding path program 1 times [2021-12-21 14:53:02,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:02,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287352363] [2021-12-21 14:53:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:02,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:02,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:02,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:53:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:02,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:53:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:02,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:53:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:02,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:53:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:02,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:02,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287352363] [2021-12-21 14:53:02,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287352363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:02,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:02,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:02,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125970700] [2021-12-21 14:53:02,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:02,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:02,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:02,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:02,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:02,793 INFO L87 Difference]: Start difference. First operand 19908 states and 30654 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:53:10,393 INFO L93 Difference]: Finished difference Result 75060 states and 118089 transitions. [2021-12-21 14:53:10,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:53:10,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 145 [2021-12-21 14:53:10,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:53:10,567 INFO L225 Difference]: With dead ends: 75060 [2021-12-21 14:53:10,568 INFO L226 Difference]: Without dead ends: 56797 [2021-12-21 14:53:10,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:53:10,618 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 1731 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1767 SdHoareTripleChecker+Valid, 2591 SdHoareTripleChecker+Invalid, 2586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:53:10,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1767 Valid, 2591 Invalid, 2586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 14:53:10,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56797 states. [2021-12-21 14:53:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56797 to 37541. [2021-12-21 14:53:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37541 states, 34133 states have (on average 1.5234230803035187) internal successors, (51999), 34273 states have internal predecessors, (51999), 2343 states have call successors, (2343), 890 states have call predecessors, (2343), 1063 states have return successors, (4724), 2505 states have call predecessors, (4724), 2342 states have call successors, (4724) [2021-12-21 14:53:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37541 states to 37541 states and 59066 transitions. [2021-12-21 14:53:13,656 INFO L78 Accepts]: Start accepts. Automaton has 37541 states and 59066 transitions. Word has length 145 [2021-12-21 14:53:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:53:13,656 INFO L470 AbstractCegarLoop]: Abstraction has 37541 states and 59066 transitions. [2021-12-21 14:53:13,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 14:53:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand 37541 states and 59066 transitions. [2021-12-21 14:53:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 14:53:13,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:53:13,673 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] [2021-12-21 14:53:13,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 14:53:13,673 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:53:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:53:13,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1082820348, now seen corresponding path program 1 times [2021-12-21 14:53:13,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:53:13,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631559204] [2021-12-21 14:53:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:53:13,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:53:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:53:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:13,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 14:53:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:13,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-21 14:53:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:13,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-21 14:53:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:13,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 14:53:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:53:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:53:13,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:53:13,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631559204] [2021-12-21 14:53:13,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631559204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:53:13,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:53:13,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:53:13,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298629027] [2021-12-21 14:53:13,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:53:13,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:53:13,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:53:13,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:53:13,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:53:13,786 INFO L87 Difference]: Start difference. First operand 37541 states and 59066 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)