./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3322c0c768700658989b53a570d5dd58dc6c9ba5f33ff303fa538b570ca8619 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:13:33,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:13:33,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:13:33,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:13:33,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:13:33,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:13:33,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:13:33,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:13:33,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:13:33,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:13:33,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:13:33,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:13:33,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:13:33,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:13:33,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:13:33,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:13:33,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:13:33,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:13:33,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:13:33,308 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:13:33,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:13:33,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:13:33,312 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:13:33,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:13:33,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:13:33,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:13:33,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:13:33,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:13:33,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:13:33,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:13:33,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:13:33,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:13:33,320 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:13:33,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:13:33,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:13:33,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:13:33,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:13:33,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:13:33,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:13:33,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:13:33,325 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:13:33,326 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:13:33,342 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:13:33,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:13:33,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:13:33,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:13:33,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:13:33,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:13:33,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:13:33,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:13:33,345 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:13:33,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:13:33,345 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:13:33,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:13:33,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:13:33,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:13:33,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:13:33,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:13:33,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:13:33,346 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:13:33,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:13:33,347 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:13:33,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:13:33,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:13:33,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:13:33,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:13:33,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:13:33,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:13:33,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:13:33,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:13:33,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:13:33,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:13:33,348 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:13:33,348 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:13:33,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:13:33,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:13:33,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3322c0c768700658989b53a570d5dd58dc6c9ba5f33ff303fa538b570ca8619 [2021-12-22 13:13:33,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:13:33,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:13:33,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:13:33,540 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:13:33,540 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:13:33,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c [2021-12-22 13:13:33,600 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde8f9f7b/0bb566edcc7d40999cfbf3ea8b348447/FLAGcac5048e6 [2021-12-22 13:13:34,039 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:13:34,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c [2021-12-22 13:13:34,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde8f9f7b/0bb566edcc7d40999cfbf3ea8b348447/FLAGcac5048e6 [2021-12-22 13:13:34,065 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde8f9f7b/0bb566edcc7d40999cfbf3ea8b348447 [2021-12-22 13:13:34,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:13:34,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:13:34,071 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:13:34,071 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:13:34,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:13:34,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f5007d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34, skipping insertion in model container [2021-12-22 13:13:34,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:13:34,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:13:34,255 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c[914,927] [2021-12-22 13:13:34,284 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c[7115,7128] [2021-12-22 13:13:34,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:13:34,364 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:13:34,371 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c[914,927] [2021-12-22 13:13:34,393 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-2.c[7115,7128] [2021-12-22 13:13:34,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:13:34,450 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:13:34,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34 WrapperNode [2021-12-22 13:13:34,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:13:34,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:13:34,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:13:34,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:13:34,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,506 INFO L137 Inliner]: procedures = 75, calls = 90, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 982 [2021-12-22 13:13:34,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:13:34,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:13:34,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:13:34,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:13:34,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:13:34,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:13:34,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:13:34,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:13:34,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34" (1/1) ... [2021-12-22 13:13:34,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:13:34,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:13:34,573 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) [2021-12-22 13:13:34,576 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 [2021-12-22 13:13:34,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:13:34,605 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:13:34,605 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:13:34,606 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-22 13:13:34,606 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-22 13:13:34,606 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:13:34,606 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:13:34,607 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:13:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:13:34,607 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-22 13:13:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-22 13:13:34,607 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:13:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:13:34,607 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:13:34,607 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:13:34,608 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-22 13:13:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-22 13:13:34,608 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-22 13:13:34,611 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-22 13:13:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-22 13:13:34,611 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-22 13:13:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:13:34,612 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:13:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:13:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:13:34,612 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:13:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-22 13:13:34,612 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-22 13:13:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:13:34,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:13:34,612 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:13:34,613 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:13:34,718 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:13:34,720 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:13:35,355 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:13:35,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:13:35,370 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-12-22 13:13:35,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:13:35 BoogieIcfgContainer [2021-12-22 13:13:35,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:13:35,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:13:35,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:13:35,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:13:35,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:13:34" (1/3) ... [2021-12-22 13:13:35,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38772f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:13:35, skipping insertion in model container [2021-12-22 13:13:35,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:34" (2/3) ... [2021-12-22 13:13:35,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38772f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:13:35, skipping insertion in model container [2021-12-22 13:13:35,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:13:35" (3/3) ... [2021-12-22 13:13:35,378 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.11.cil-2.c [2021-12-22 13:13:35,383 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:13:35,383 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:13:35,444 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:13:35,452 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 [2021-12-22 13:13:35,453 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:13:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 458 states, 402 states have (on average 1.63681592039801) internal successors, (658), 408 states have internal predecessors, (658), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-12-22 13:13:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:13:35,502 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:35,503 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] [2021-12-22 13:13:35,503 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash -978370307, now seen corresponding path program 1 times [2021-12-22 13:13:35,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:35,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506638128] [2021-12-22 13:13:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:35,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:35,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:35,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:35,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:35,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:35,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:35,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:35,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:35,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:35,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506638128] [2021-12-22 13:13:35,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506638128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:35,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:35,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:13:35,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153206397] [2021-12-22 13:13:35,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:35,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:13:35,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:35,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:13:35,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:13:35,896 INFO L87 Difference]: Start difference. First operand has 458 states, 402 states have (on average 1.63681592039801) internal successors, (658), 408 states have internal predecessors, (658), 39 states have call successors, (39), 14 states have call predecessors, (39), 14 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:13:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:36,839 INFO L93 Difference]: Finished difference Result 1024 states and 1632 transitions. [2021-12-22 13:13:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:13:36,841 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 [2021-12-22 13:13:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:36,851 INFO L225 Difference]: With dead ends: 1024 [2021-12-22 13:13:36,851 INFO L226 Difference]: Without dead ends: 583 [2021-12-22 13:13:36,856 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 [2021-12-22 13:13:36,858 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 810 mSDsluCounter, 1983 mSDsCounter, 0 mSdLazyCounter, 1068 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:36,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 2682 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1068 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:13:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-12-22 13:13:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 544. [2021-12-22 13:13:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 470 states have (on average 1.5212765957446808) internal successors, (715), 476 states have internal predecessors, (715), 50 states have call successors, (50), 21 states have call predecessors, (50), 22 states have return successors, (53), 49 states have call predecessors, (53), 48 states have call successors, (53) [2021-12-22 13:13:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 818 transitions. [2021-12-22 13:13:36,927 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 818 transitions. Word has length 65 [2021-12-22 13:13:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:36,927 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 818 transitions. [2021-12-22 13:13:36,927 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) [2021-12-22 13:13:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 818 transitions. [2021-12-22 13:13:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:13:36,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:36,931 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] [2021-12-22 13:13:36,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:13:36,931 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash 700518333, now seen corresponding path program 1 times [2021-12-22 13:13:36,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:36,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432788774] [2021-12-22 13:13:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:36,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:36,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:37,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:37,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:37,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:37,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:37,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:37,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:37,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:37,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432788774] [2021-12-22 13:13:37,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432788774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:37,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:37,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:13:37,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322779077] [2021-12-22 13:13:37,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:37,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:13:37,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:37,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:13:37,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:13:37,055 INFO L87 Difference]: Start difference. First operand 544 states and 818 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:13:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:37,948 INFO L93 Difference]: Finished difference Result 891 states and 1295 transitions. [2021-12-22 13:13:37,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:13:37,948 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-22 13:13:37,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:37,953 INFO L225 Difference]: With dead ends: 891 [2021-12-22 13:13:37,953 INFO L226 Difference]: Without dead ends: 714 [2021-12-22 13:13:37,954 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 [2021-12-22 13:13:37,955 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 1354 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 1236 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 2363 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:37,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 2363 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1236 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:13:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-12-22 13:13:37,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 640. [2021-12-22 13:13:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 546 states have (on average 1.5) internal successors, (819), 554 states have internal predecessors, (819), 61 states have call successors, (61), 28 states have call predecessors, (61), 31 states have return successors, (72), 61 states have call predecessors, (72), 59 states have call successors, (72) [2021-12-22 13:13:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 952 transitions. [2021-12-22 13:13:37,989 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 952 transitions. Word has length 65 [2021-12-22 13:13:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:37,989 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 952 transitions. [2021-12-22 13:13:37,990 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) [2021-12-22 13:13:37,990 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 952 transitions. [2021-12-22 13:13:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:13:37,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:37,992 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] [2021-12-22 13:13:37,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:13:37,993 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:37,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:37,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1328067777, now seen corresponding path program 1 times [2021-12-22 13:13:37,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:37,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563891587] [2021-12-22 13:13:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:37,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:38,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:38,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:38,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:38,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:38,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:38,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:38,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:38,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:38,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563891587] [2021-12-22 13:13:38,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563891587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:38,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:38,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:13:38,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800356530] [2021-12-22 13:13:38,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:38,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:13:38,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:38,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:13:38,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:13:38,098 INFO L87 Difference]: Start difference. First operand 640 states and 952 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:13:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:38,914 INFO L93 Difference]: Finished difference Result 941 states and 1366 transitions. [2021-12-22 13:13:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:13:38,915 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 [2021-12-22 13:13:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:38,920 INFO L225 Difference]: With dead ends: 941 [2021-12-22 13:13:38,920 INFO L226 Difference]: Without dead ends: 674 [2021-12-22 13:13:38,922 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 [2021-12-22 13:13:38,926 INFO L933 BasicCegarLoop]: 671 mSDtfsCounter, 909 mSDsluCounter, 2158 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:38,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 2829 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:13:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-12-22 13:13:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 645. [2021-12-22 13:13:38,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 550 states have (on average 1.4927272727272727) internal successors, (821), 558 states have internal predecessors, (821), 61 states have call successors, (61), 28 states have call predecessors, (61), 32 states have return successors, (73), 62 states have call predecessors, (73), 59 states have call successors, (73) [2021-12-22 13:13:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 955 transitions. [2021-12-22 13:13:38,964 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 955 transitions. Word has length 65 [2021-12-22 13:13:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:38,964 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 955 transitions. [2021-12-22 13:13:38,964 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) [2021-12-22 13:13:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 955 transitions. [2021-12-22 13:13:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:13:38,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:38,966 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] [2021-12-22 13:13:38,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:13:38,966 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:38,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1937540221, now seen corresponding path program 1 times [2021-12-22 13:13:38,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:38,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677909739] [2021-12-22 13:13:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:38,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:39,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:39,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:39,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:39,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:39,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:39,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:39,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:39,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677909739] [2021-12-22 13:13:39,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677909739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:39,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:39,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:13:39,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425118947] [2021-12-22 13:13:39,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:39,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:13:39,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:39,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:13:39,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:13:39,074 INFO L87 Difference]: Start difference. First operand 645 states and 955 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 13:13:40,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:40,408 INFO L93 Difference]: Finished difference Result 1967 states and 2751 transitions. [2021-12-22 13:13:40,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 13:13:40,409 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-22 13:13:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:40,416 INFO L225 Difference]: With dead ends: 1967 [2021-12-22 13:13:40,416 INFO L226 Difference]: Without dead ends: 1677 [2021-12-22 13:13:40,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:13:40,422 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 3866 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3884 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:40,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3884 Valid, 2476 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:13:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-12-22 13:13:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1546. [2021-12-22 13:13:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1265 states have (on average 1.391304347826087) internal successors, (1760), 1288 states have internal predecessors, (1760), 149 states have call successors, (149), 111 states have call predecessors, (149), 130 states have return successors, (187), 149 states have call predecessors, (187), 147 states have call successors, (187) [2021-12-22 13:13:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2096 transitions. [2021-12-22 13:13:40,482 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2096 transitions. Word has length 65 [2021-12-22 13:13:40,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:40,483 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 2096 transitions. [2021-12-22 13:13:40,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 13:13:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2096 transitions. [2021-12-22 13:13:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:13:40,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:40,484 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] [2021-12-22 13:13:40,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:13:40,484 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:40,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1305977986, now seen corresponding path program 1 times [2021-12-22 13:13:40,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:40,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424957882] [2021-12-22 13:13:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:40,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:40,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:40,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:40,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:40,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:40,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:40,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:40,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:40,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:40,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424957882] [2021-12-22 13:13:40,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424957882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:40,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:40,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:13:40,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858431681] [2021-12-22 13:13:40,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:40,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:13:40,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:40,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:13:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:13:40,596 INFO L87 Difference]: Start difference. First operand 1546 states and 2096 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:13:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:41,424 INFO L93 Difference]: Finished difference Result 2837 states and 3769 transitions. [2021-12-22 13:13:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:13:41,425 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 [2021-12-22 13:13:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:41,431 INFO L225 Difference]: With dead ends: 2837 [2021-12-22 13:13:41,431 INFO L226 Difference]: Without dead ends: 1652 [2021-12-22 13:13:41,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:13:41,434 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 910 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 2815 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:41,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 2815 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:13:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-12-22 13:13:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1576. [2021-12-22 13:13:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1289 states have (on average 1.377812257564003) internal successors, (1776), 1312 states have internal predecessors, (1776), 149 states have call successors, (149), 111 states have call predecessors, (149), 136 states have return successors, (193), 155 states have call predecessors, (193), 147 states have call successors, (193) [2021-12-22 13:13:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2118 transitions. [2021-12-22 13:13:41,493 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2118 transitions. Word has length 65 [2021-12-22 13:13:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:41,493 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 2118 transitions. [2021-12-22 13:13:41,494 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) [2021-12-22 13:13:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2118 transitions. [2021-12-22 13:13:41,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:13:41,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:41,494 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] [2021-12-22 13:13:41,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:13:41,495 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:41,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:41,495 INFO L85 PathProgramCache]: Analyzing trace with hash 80225408, now seen corresponding path program 1 times [2021-12-22 13:13:41,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:41,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524760264] [2021-12-22 13:13:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:41,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:41,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:41,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:41,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:41,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:41,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:41,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:41,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:41,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:41,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524760264] [2021-12-22 13:13:41,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524760264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:41,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:41,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:13:41,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362959684] [2021-12-22 13:13:41,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:41,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:13:41,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:41,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:13:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:13:41,598 INFO L87 Difference]: Start difference. First operand 1576 states and 2118 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-22 13:13:41,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:41,947 INFO L93 Difference]: Finished difference Result 4012 states and 5222 transitions. [2021-12-22 13:13:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:13:41,948 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 [2021-12-22 13:13:41,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:41,958 INFO L225 Difference]: With dead ends: 4012 [2021-12-22 13:13:41,958 INFO L226 Difference]: Without dead ends: 2798 [2021-12-22 13:13:41,962 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 [2021-12-22 13:13:41,963 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 1994 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2025 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:41,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2025 Valid, 1320 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 13:13:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-12-22 13:13:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2690. [2021-12-22 13:13:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2144 states have (on average 1.3129664179104477) internal successors, (2815), 2189 states have internal predecessors, (2815), 274 states have call successors, (274), 215 states have call predecessors, (274), 270 states have return successors, (401), 290 states have call predecessors, (401), 272 states have call successors, (401) [2021-12-22 13:13:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 3490 transitions. [2021-12-22 13:13:42,073 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 3490 transitions. Word has length 65 [2021-12-22 13:13:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:42,073 INFO L470 AbstractCegarLoop]: Abstraction has 2690 states and 3490 transitions. [2021-12-22 13:13:42,073 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) [2021-12-22 13:13:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 3490 transitions. [2021-12-22 13:13:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:13:42,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:42,074 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] [2021-12-22 13:13:42,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:13:42,075 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:42,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:42,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1125374181, now seen corresponding path program 1 times [2021-12-22 13:13:42,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:42,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719012048] [2021-12-22 13:13:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:42,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:42,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:42,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:42,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719012048] [2021-12-22 13:13:42,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719012048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:42,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:42,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:13:42,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035261638] [2021-12-22 13:13:42,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:42,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:13:42,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:13:42,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:13:42,131 INFO L87 Difference]: Start difference. First operand 2690 states and 3490 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:13:42,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:42,653 INFO L93 Difference]: Finished difference Result 6082 states and 7754 transitions. [2021-12-22 13:13:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:13:42,654 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 [2021-12-22 13:13:42,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:42,667 INFO L225 Difference]: With dead ends: 6082 [2021-12-22 13:13:42,667 INFO L226 Difference]: Without dead ends: 3759 [2021-12-22 13:13:42,671 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 [2021-12-22 13:13:42,673 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 1124 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 1644 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:42,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1133 Valid, 1644 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:13:42,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-12-22 13:13:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3503. [2021-12-22 13:13:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 2773 states have (on average 1.294626758023801) internal successors, (3590), 2825 states have internal predecessors, (3590), 364 states have call successors, (364), 293 states have call predecessors, (364), 364 states have return successors, (515), 389 states have call predecessors, (515), 362 states have call successors, (515) [2021-12-22 13:13:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 4469 transitions. [2021-12-22 13:13:42,819 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 4469 transitions. Word has length 66 [2021-12-22 13:13:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:42,819 INFO L470 AbstractCegarLoop]: Abstraction has 3503 states and 4469 transitions. [2021-12-22 13:13:42,819 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) [2021-12-22 13:13:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 4469 transitions. [2021-12-22 13:13:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 13:13:42,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:42,824 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] [2021-12-22 13:13:42,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:13:42,824 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:42,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:42,825 INFO L85 PathProgramCache]: Analyzing trace with hash 242787514, now seen corresponding path program 1 times [2021-12-22 13:13:42,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:42,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869485571] [2021-12-22 13:13:42,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:42,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:42,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869485571] [2021-12-22 13:13:42,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869485571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:42,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:42,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:13:42,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403773035] [2021-12-22 13:13:42,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:42,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:13:42,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:13:42,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:13:42,881 INFO L87 Difference]: Start difference. First operand 3503 states and 4469 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 13:13:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:43,268 INFO L93 Difference]: Finished difference Result 7452 states and 9371 transitions. [2021-12-22 13:13:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:13:43,269 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 [2021-12-22 13:13:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:43,312 INFO L225 Difference]: With dead ends: 7452 [2021-12-22 13:13:43,313 INFO L226 Difference]: Without dead ends: 4314 [2021-12-22 13:13:43,317 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 [2021-12-22 13:13:43,317 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 1293 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 1698 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:43,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1326 Valid, 1698 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:13:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4314 states. [2021-12-22 13:13:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4314 to 4066. [2021-12-22 13:13:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 3220 states have (on average 1.2847826086956522) internal successors, (4137), 3278 states have internal predecessors, (4137), 420 states have call successors, (420), 343 states have call predecessors, (420), 424 states have return successors, (592), 449 states have call predecessors, (592), 418 states have call successors, (592) [2021-12-22 13:13:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 5149 transitions. [2021-12-22 13:13:43,435 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 5149 transitions. Word has length 72 [2021-12-22 13:13:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:43,435 INFO L470 AbstractCegarLoop]: Abstraction has 4066 states and 5149 transitions. [2021-12-22 13:13:43,435 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) [2021-12-22 13:13:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 5149 transitions. [2021-12-22 13:13:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 13:13:43,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:43,437 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] [2021-12-22 13:13:43,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:13:43,437 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:43,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1580378082, now seen corresponding path program 1 times [2021-12-22 13:13:43,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:43,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292687679] [2021-12-22 13:13:43,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:43,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:43,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:43,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:43,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:43,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:43,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:43,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:43,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:43,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:43,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292687679] [2021-12-22 13:13:43,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292687679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:43,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:43,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:13:43,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272842740] [2021-12-22 13:13:43,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:43,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:13:43,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:13:43,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:13:43,500 INFO L87 Difference]: Start difference. First operand 4066 states and 5149 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:13:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:43,952 INFO L93 Difference]: Finished difference Result 5115 states and 6409 transitions. [2021-12-22 13:13:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:13:43,953 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 [2021-12-22 13:13:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:43,970 INFO L225 Difference]: With dead ends: 5115 [2021-12-22 13:13:43,970 INFO L226 Difference]: Without dead ends: 5112 [2021-12-22 13:13:43,973 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 [2021-12-22 13:13:43,975 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 1948 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:43,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1958 Valid, 1666 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:13:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2021-12-22 13:13:44,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 4803. [2021-12-22 13:13:44,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 3782 states have (on average 1.273664727657324) internal successors, (4817), 3847 states have internal predecessors, (4817), 501 states have call successors, (501), 413 states have call predecessors, (501), 518 states have return successors, (716), 547 states have call predecessors, (716), 500 states have call successors, (716) [2021-12-22 13:13:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 6034 transitions. [2021-12-22 13:13:44,191 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 6034 transitions. Word has length 73 [2021-12-22 13:13:44,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:44,193 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 6034 transitions. [2021-12-22 13:13:44,193 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) [2021-12-22 13:13:44,193 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 6034 transitions. [2021-12-22 13:13:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 13:13:44,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:44,195 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] [2021-12-22 13:13:44,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:13:44,195 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:44,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:44,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1748440700, now seen corresponding path program 1 times [2021-12-22 13:13:44,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:44,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609877238] [2021-12-22 13:13:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:44,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:44,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:44,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:44,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:44,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:44,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:44,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:44,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:44,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:44,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609877238] [2021-12-22 13:13:44,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609877238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:13:44,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839057977] [2021-12-22 13:13:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:44,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:13:44,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:13:44,322 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) [2021-12-22 13:13:44,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:13:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:44,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:13:44,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:13:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:44,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:13:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:45,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839057977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:13:45,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:13:45,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-22 13:13:45,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674537650] [2021-12-22 13:13:45,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:13:45,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:13:45,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:45,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:13:45,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:13:45,007 INFO L87 Difference]: Start difference. First operand 4803 states and 6034 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-22 13:13:46,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:46,403 INFO L93 Difference]: Finished difference Result 9217 states and 11407 transitions. [2021-12-22 13:13:46,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-22 13:13:46,404 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 [2021-12-22 13:13:46,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:46,433 INFO L225 Difference]: With dead ends: 9217 [2021-12-22 13:13:46,434 INFO L226 Difference]: Without dead ends: 9214 [2021-12-22 13:13:46,437 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 [2021-12-22 13:13:46,438 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 2800 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2865 SdHoareTripleChecker+Valid, 2345 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:46,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2865 Valid, 2345 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:13:46,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2021-12-22 13:13:46,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 8328. [2021-12-22 13:13:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8328 states, 6537 states have (on average 1.259140278415175) internal successors, (8231), 6653 states have internal predecessors, (8231), 869 states have call successors, (869), 735 states have call predecessors, (869), 920 states have return successors, (1253), 944 states have call predecessors, (1253), 868 states have call successors, (1253) [2021-12-22 13:13:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8328 states to 8328 states and 10353 transitions. [2021-12-22 13:13:46,751 INFO L78 Accepts]: Start accepts. Automaton has 8328 states and 10353 transitions. Word has length 74 [2021-12-22 13:13:46,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:46,751 INFO L470 AbstractCegarLoop]: Abstraction has 8328 states and 10353 transitions. [2021-12-22 13:13:46,752 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) [2021-12-22 13:13:46,752 INFO L276 IsEmpty]: Start isEmpty. Operand 8328 states and 10353 transitions. [2021-12-22 13:13:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 13:13:46,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:46,754 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] [2021-12-22 13:13:46,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:13:46,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 13:13:46,968 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:46,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:46,968 INFO L85 PathProgramCache]: Analyzing trace with hash 17284126, now seen corresponding path program 2 times [2021-12-22 13:13:46,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:46,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800205641] [2021-12-22 13:13:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:46,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:46,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:47,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:47,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800205641] [2021-12-22 13:13:47,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800205641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:47,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:47,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:13:47,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307283251] [2021-12-22 13:13:47,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:47,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:13:47,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:47,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:13:47,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:13:47,027 INFO L87 Difference]: Start difference. First operand 8328 states and 10353 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-22 13:13:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:47,474 INFO L93 Difference]: Finished difference Result 11318 states and 14054 transitions. [2021-12-22 13:13:47,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:13:47,475 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 [2021-12-22 13:13:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:47,487 INFO L225 Difference]: With dead ends: 11318 [2021-12-22 13:13:47,487 INFO L226 Difference]: Without dead ends: 4700 [2021-12-22 13:13:47,497 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 [2021-12-22 13:13:47,497 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 1226 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:47,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 1764 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:13:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4700 states. [2021-12-22 13:13:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4700 to 3651. [2021-12-22 13:13:47,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3651 states, 2896 states have (on average 1.2613950276243093) internal successors, (3653), 2934 states have internal predecessors, (3653), 384 states have call successors, (384), 315 states have call predecessors, (384), 369 states have return successors, (509), 406 states have call predecessors, (509), 383 states have call successors, (509) [2021-12-22 13:13:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3651 states to 3651 states and 4546 transitions. [2021-12-22 13:13:47,654 INFO L78 Accepts]: Start accepts. Automaton has 3651 states and 4546 transitions. Word has length 77 [2021-12-22 13:13:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:47,655 INFO L470 AbstractCegarLoop]: Abstraction has 3651 states and 4546 transitions. [2021-12-22 13:13:47,655 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) [2021-12-22 13:13:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3651 states and 4546 transitions. [2021-12-22 13:13:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 13:13:47,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:47,657 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] [2021-12-22 13:13:47,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:13:47,657 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:47,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:47,657 INFO L85 PathProgramCache]: Analyzing trace with hash 621442966, now seen corresponding path program 1 times [2021-12-22 13:13:47,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:47,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350299679] [2021-12-22 13:13:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:47,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:13:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:13:47,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:47,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350299679] [2021-12-22 13:13:47,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350299679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:47,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:47,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:13:47,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064780652] [2021-12-22 13:13:47,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:47,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:13:47,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:47,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:13:47,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:13:47,718 INFO L87 Difference]: Start difference. First operand 3651 states and 4546 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:13:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:48,734 INFO L93 Difference]: Finished difference Result 10215 states and 12513 transitions. [2021-12-22 13:13:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:13:48,735 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 [2021-12-22 13:13:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:48,751 INFO L225 Difference]: With dead ends: 10215 [2021-12-22 13:13:48,752 INFO L226 Difference]: Without dead ends: 5863 [2021-12-22 13:13:48,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:13:48,760 INFO L933 BasicCegarLoop]: 724 mSDtfsCounter, 1067 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 2396 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:48,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1080 Valid, 2396 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:13:48,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5863 states. [2021-12-22 13:13:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5863 to 5599. [2021-12-22 13:13:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 4375 states have (on average 1.226057142857143) internal successors, (5364), 4456 states have internal predecessors, (5364), 598 states have call successors, (598), 499 states have call predecessors, (598), 624 states have return successors, (889), 648 states have call predecessors, (889), 597 states have call successors, (889) [2021-12-22 13:13:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 6851 transitions. [2021-12-22 13:13:48,979 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 6851 transitions. Word has length 84 [2021-12-22 13:13:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:48,980 INFO L470 AbstractCegarLoop]: Abstraction has 5599 states and 6851 transitions. [2021-12-22 13:13:48,980 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) [2021-12-22 13:13:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 6851 transitions. [2021-12-22 13:13:48,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 13:13:48,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:48,982 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] [2021-12-22 13:13:48,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:13:48,983 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash 770149948, now seen corresponding path program 1 times [2021-12-22 13:13:48,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:48,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183392802] [2021-12-22 13:13:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:48,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:49,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:49,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:49,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:49,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:49,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:49,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:49,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:49,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:13:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 13:13:49,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183392802] [2021-12-22 13:13:49,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183392802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:49,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:49,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:13:49,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043544825] [2021-12-22 13:13:49,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:49,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:13:49,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:49,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:13:49,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:13:49,043 INFO L87 Difference]: Start difference. First operand 5599 states and 6851 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-22 13:13:50,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:50,056 INFO L93 Difference]: Finished difference Result 9226 states and 11185 transitions. [2021-12-22 13:13:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:13:50,056 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 [2021-12-22 13:13:50,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:50,069 INFO L225 Difference]: With dead ends: 9226 [2021-12-22 13:13:50,069 INFO L226 Difference]: Without dead ends: 4717 [2021-12-22 13:13:50,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-22 13:13:50,100 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 2268 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2308 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:50,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2308 Valid, 2062 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:13:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4717 states. [2021-12-22 13:13:50,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4717 to 4286. [2021-12-22 13:13:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 3344 states have (on average 1.2135167464114833) internal successors, (4058), 3408 states have internal predecessors, (4058), 457 states have call successors, (457), 376 states have call predecessors, (457), 483 states have return successors, (635), 506 states have call predecessors, (635), 456 states have call successors, (635) [2021-12-22 13:13:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 5150 transitions. [2021-12-22 13:13:50,238 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 5150 transitions. Word has length 93 [2021-12-22 13:13:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:50,239 INFO L470 AbstractCegarLoop]: Abstraction has 4286 states and 5150 transitions. [2021-12-22 13:13:50,239 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) [2021-12-22 13:13:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 5150 transitions. [2021-12-22 13:13:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-22 13:13:50,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:50,243 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] [2021-12-22 13:13:50,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:13:50,243 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:50,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:50,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1691833410, now seen corresponding path program 1 times [2021-12-22 13:13:50,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:50,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852729586] [2021-12-22 13:13:50,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:50,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:13:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:13:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:13:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:13:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:13:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:13:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-22 13:13:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 13:13:50,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:50,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852729586] [2021-12-22 13:13:50,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852729586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:13:50,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289327196] [2021-12-22 13:13:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:50,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:13:50,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:13:50,328 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) [2021-12-22 13:13:50,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:13:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:50,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 13:13:50,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:13:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:13:50,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:13:50,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289327196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:50,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:13:50,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-22 13:13:50,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627190573] [2021-12-22 13:13:50,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:50,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:13:50,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:50,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:13:50,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:13:50,583 INFO L87 Difference]: Start difference. First operand 4286 states and 5150 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 13:13:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:50,711 INFO L93 Difference]: Finished difference Result 6450 states and 7738 transitions. [2021-12-22 13:13:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:13:50,711 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 [2021-12-22 13:13:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:50,717 INFO L225 Difference]: With dead ends: 6450 [2021-12-22 13:13:50,717 INFO L226 Difference]: Without dead ends: 2531 [2021-12-22 13:13:50,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:13:50,723 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 34 mSDsluCounter, 2695 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3378 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:50,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3378 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:13:50,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2531 states. [2021-12-22 13:13:50,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2531 to 2375. [2021-12-22 13:13:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 1941 states have (on average 1.237506439979392) internal successors, (2402), 1961 states have internal predecessors, (2402), 216 states have call successors, (216), 163 states have call predecessors, (216), 216 states have return successors, (301), 251 states have call predecessors, (301), 215 states have call successors, (301) [2021-12-22 13:13:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 2919 transitions. [2021-12-22 13:13:50,805 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 2919 transitions. Word has length 145 [2021-12-22 13:13:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:50,806 INFO L470 AbstractCegarLoop]: Abstraction has 2375 states and 2919 transitions. [2021-12-22 13:13:50,806 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) [2021-12-22 13:13:50,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 2919 transitions. [2021-12-22 13:13:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-22 13:13:50,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:50,809 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] [2021-12-22 13:13:50,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-22 13:13:51,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 13:13:51,018 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:51,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:51,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1863034906, now seen corresponding path program 1 times [2021-12-22 13:13:51,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:51,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260575980] [2021-12-22 13:13:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:51,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:13:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 13:13:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:13:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:13:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:13:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 13:13:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 13:13:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-22 13:13:51,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:51,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260575980] [2021-12-22 13:13:51,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260575980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:51,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:51,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:13:51,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42244574] [2021-12-22 13:13:51,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:51,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:13:51,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:51,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:13:51,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:13:51,090 INFO L87 Difference]: Start difference. First operand 2375 states and 2919 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 13:13:51,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:51,480 INFO L93 Difference]: Finished difference Result 2425 states and 2971 transitions. [2021-12-22 13:13:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:13:51,481 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 [2021-12-22 13:13:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:51,485 INFO L225 Difference]: With dead ends: 2425 [2021-12-22 13:13:51,485 INFO L226 Difference]: Without dead ends: 1932 [2021-12-22 13:13:51,488 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 [2021-12-22 13:13:51,489 INFO L933 BasicCegarLoop]: 661 mSDtfsCounter, 1005 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:51,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 1569 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:13:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-12-22 13:13:51,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1885. [2021-12-22 13:13:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1562 states have (on average 1.2605633802816902) internal successors, (1969), 1577 states have internal predecessors, (1969), 163 states have call successors, (163), 118 states have call predecessors, (163), 158 states have return successors, (225), 190 states have call predecessors, (225), 162 states have call successors, (225) [2021-12-22 13:13:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2357 transitions. [2021-12-22 13:13:51,570 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2357 transitions. Word has length 147 [2021-12-22 13:13:51,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:51,571 INFO L470 AbstractCegarLoop]: Abstraction has 1885 states and 2357 transitions. [2021-12-22 13:13:51,571 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) [2021-12-22 13:13:51,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2357 transitions. [2021-12-22 13:13:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-22 13:13:51,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:51,574 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:51,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:13:51,574 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:51,574 INFO L85 PathProgramCache]: Analyzing trace with hash 604042568, now seen corresponding path program 1 times [2021-12-22 13:13:51,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:51,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322862563] [2021-12-22 13:13:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:51,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:51,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:13:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:13:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:13:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:13:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-22 13:13:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-22 13:13:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-22 13:13:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:51,661 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-22 13:13:51,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:51,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322862563] [2021-12-22 13:13:51,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322862563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:51,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:51,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:13:51,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687856907] [2021-12-22 13:13:51,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:51,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:13:51,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:51,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:13:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:13:51,663 INFO L87 Difference]: Start difference. First operand 1885 states and 2357 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-22 13:13:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:52,287 INFO L93 Difference]: Finished difference Result 3166 states and 3875 transitions. [2021-12-22 13:13:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:13:52,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-22 13:13:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:52,291 INFO L225 Difference]: With dead ends: 3166 [2021-12-22 13:13:52,292 INFO L226 Difference]: Without dead ends: 1784 [2021-12-22 13:13:52,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:13:52,294 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 640 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 2375 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:52,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 2375 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:13:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-12-22 13:13:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1638. [2021-12-22 13:13:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1366 states have (on average 1.2767203513909224) internal successors, (1744), 1379 states have internal predecessors, (1744), 139 states have call successors, (139), 98 states have call predecessors, (139), 131 states have return successors, (186), 161 states have call predecessors, (186), 138 states have call successors, (186) [2021-12-22 13:13:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2069 transitions. [2021-12-22 13:13:52,355 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2069 transitions. Word has length 159 [2021-12-22 13:13:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:52,355 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 2069 transitions. [2021-12-22 13:13:52,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-22 13:13:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2069 transitions. [2021-12-22 13:13:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 13:13:52,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:52,358 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:52,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:13:52,359 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:52,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1591452551, now seen corresponding path program 1 times [2021-12-22 13:13:52,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:52,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725488546] [2021-12-22 13:13:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:52,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:13:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:13:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:13:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:13:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:13:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 13:13:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-22 13:13:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 13:13:52,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725488546] [2021-12-22 13:13:52,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725488546] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:13:52,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052961391] [2021-12-22 13:13:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:52,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:13:52,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:13:52,488 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:13:52,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:13:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:52,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:13:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:13:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-22 13:13:52,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:13:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-22 13:13:53,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052961391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:13:53,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:13:53,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-22 13:13:53,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245894459] [2021-12-22 13:13:53,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:13:53,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:13:53,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:13:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:13:53,200 INFO L87 Difference]: Start difference. First operand 1638 states and 2069 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-22 13:13:54,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:54,313 INFO L93 Difference]: Finished difference Result 3432 states and 4271 transitions. [2021-12-22 13:13:54,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 13:13:54,313 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2021-12-22 13:13:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:54,318 INFO L225 Difference]: With dead ends: 3432 [2021-12-22 13:13:54,318 INFO L226 Difference]: Without dead ends: 2029 [2021-12-22 13:13:54,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 355 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-12-22 13:13:54,321 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 2424 mSDsluCounter, 1794 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 2425 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:54,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2455 Valid, 2425 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:13:54,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-12-22 13:13:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1916. [2021-12-22 13:13:54,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1569 states have (on average 1.2402804333970683) internal successors, (1946), 1583 states have internal predecessors, (1946), 179 states have call successors, (179), 136 states have call predecessors, (179), 166 states have return successors, (255), 197 states have call predecessors, (255), 178 states have call successors, (255) [2021-12-22 13:13:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2380 transitions. [2021-12-22 13:13:54,406 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2380 transitions. Word has length 162 [2021-12-22 13:13:54,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:54,406 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2380 transitions. [2021-12-22 13:13:54,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-22 13:13:54,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2380 transitions. [2021-12-22 13:13:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:13:54,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:54,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:54,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:13:54,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:13:54,616 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:54,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:54,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1328549862, now seen corresponding path program 1 times [2021-12-22 13:13:54,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:54,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840011949] [2021-12-22 13:13:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:54,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:54,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:54,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:13:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:54,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:13:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:54,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:13:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:54,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:13:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:54,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:54,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840011949] [2021-12-22 13:13:54,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840011949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:54,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:54,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:13:54,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986512552] [2021-12-22 13:13:54,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:54,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:13:54,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:54,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:13:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:13:54,710 INFO L87 Difference]: Start difference. First operand 1916 states and 2380 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:55,829 INFO L93 Difference]: Finished difference Result 2392 states and 3150 transitions. [2021-12-22 13:13:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:13:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:13:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:55,833 INFO L225 Difference]: With dead ends: 2392 [2021-12-22 13:13:55,833 INFO L226 Difference]: Without dead ends: 2047 [2021-12-22 13:13:55,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:13:55,834 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 1056 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:55,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1079 Valid, 1297 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:13:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2021-12-22 13:13:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 1916. [2021-12-22 13:13:55,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1569 states have (on average 1.2396430847673678) internal successors, (1945), 1583 states have internal predecessors, (1945), 179 states have call successors, (179), 136 states have call predecessors, (179), 166 states have return successors, (255), 197 states have call predecessors, (255), 178 states have call successors, (255) [2021-12-22 13:13:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2379 transitions. [2021-12-22 13:13:55,930 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2379 transitions. Word has length 167 [2021-12-22 13:13:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:55,930 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2379 transitions. [2021-12-22 13:13:55,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2379 transitions. [2021-12-22 13:13:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:13:55,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:55,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:55,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:13:55,932 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:55,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:55,933 INFO L85 PathProgramCache]: Analyzing trace with hash -771188568, now seen corresponding path program 1 times [2021-12-22 13:13:55,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:55,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518886004] [2021-12-22 13:13:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:55,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:55,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:55,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:13:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:13:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:13:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:13:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:56,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:56,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518886004] [2021-12-22 13:13:56,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518886004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:56,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:56,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:13:56,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455323712] [2021-12-22 13:13:56,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:56,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:13:56,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:56,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:13:56,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:13:56,022 INFO L87 Difference]: Start difference. First operand 1916 states and 2379 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:57,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:57,243 INFO L93 Difference]: Finished difference Result 2384 states and 3133 transitions. [2021-12-22 13:13:57,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:13:57,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:13:57,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:57,262 INFO L225 Difference]: With dead ends: 2384 [2021-12-22 13:13:57,262 INFO L226 Difference]: Without dead ends: 2047 [2021-12-22 13:13:57,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:13:57,263 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 1047 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:57,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1070 Valid, 1295 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:13:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2047 states. [2021-12-22 13:13:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2047 to 1916. [2021-12-22 13:13:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1569 states have (on average 1.2390057361376674) internal successors, (1944), 1583 states have internal predecessors, (1944), 179 states have call successors, (179), 136 states have call predecessors, (179), 166 states have return successors, (255), 197 states have call predecessors, (255), 178 states have call successors, (255) [2021-12-22 13:13:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2378 transitions. [2021-12-22 13:13:57,359 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2378 transitions. Word has length 167 [2021-12-22 13:13:57,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:57,359 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2378 transitions. [2021-12-22 13:13:57,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:57,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2378 transitions. [2021-12-22 13:13:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:13:57,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:57,361 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:57,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:13:57,362 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:57,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:57,362 INFO L85 PathProgramCache]: Analyzing trace with hash 151978858, now seen corresponding path program 1 times [2021-12-22 13:13:57,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:57,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99489577] [2021-12-22 13:13:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:57,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:57,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:57,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:13:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:57,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:13:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:57,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:13:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:57,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:13:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:57,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:57,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:57,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99489577] [2021-12-22 13:13:57,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99489577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:57,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:57,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:13:57,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493174010] [2021-12-22 13:13:57,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:57,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:13:57,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:57,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:13:57,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:13:57,459 INFO L87 Difference]: Start difference. First operand 1916 states and 2378 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:59,782 INFO L93 Difference]: Finished difference Result 2860 states and 3905 transitions. [2021-12-22 13:13:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:13:59,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:13:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:59,787 INFO L225 Difference]: With dead ends: 2860 [2021-12-22 13:13:59,788 INFO L226 Difference]: Without dead ends: 2527 [2021-12-22 13:13:59,789 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 [2021-12-22 13:13:59,789 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 1652 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1917 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:59,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1680 Valid, 1867 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1917 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 13:13:59,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-12-22 13:13:59,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2266. [2021-12-22 13:13:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 1892 states have (on average 1.2996828752642706) internal successors, (2459), 1907 states have internal predecessors, (2459), 199 states have call successors, (199), 142 states have call predecessors, (199), 173 states have return successors, (278), 217 states have call predecessors, (278), 198 states have call successors, (278) [2021-12-22 13:13:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 2936 transitions. [2021-12-22 13:13:59,910 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 2936 transitions. Word has length 167 [2021-12-22 13:13:59,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:59,910 INFO L470 AbstractCegarLoop]: Abstraction has 2266 states and 2936 transitions. [2021-12-22 13:13:59,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:13:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 2936 transitions. [2021-12-22 13:13:59,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:13:59,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:59,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:13:59,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:13:59,912 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:59,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:59,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1151565038, now seen corresponding path program 1 times [2021-12-22 13:13:59,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:59,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813849694] [2021-12-22 13:13:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:59,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:59,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:59,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:13:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:59,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:00,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:00,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:14:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:00,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:00,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813849694] [2021-12-22 13:14:00,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813849694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:00,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:00,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:00,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23134321] [2021-12-22 13:14:00,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:00,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:00,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:00,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:00,014 INFO L87 Difference]: Start difference. First operand 2266 states and 2936 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:02,776 INFO L93 Difference]: Finished difference Result 3708 states and 5270 transitions. [2021-12-22 13:14:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:14:02,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:14:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:02,783 INFO L225 Difference]: With dead ends: 3708 [2021-12-22 13:14:02,783 INFO L226 Difference]: Without dead ends: 3025 [2021-12-22 13:14:02,786 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 [2021-12-22 13:14:02,786 INFO L933 BasicCegarLoop]: 1050 mSDtfsCounter, 1682 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 3019 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 3063 SdHoareTripleChecker+Invalid, 3131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 3019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:02,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1710 Valid, 3063 Invalid, 3131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 3019 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 13:14:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-12-22 13:14:02,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2591. [2021-12-22 13:14:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2190 states have (on average 1.3351598173515982) internal successors, (2924), 2206 states have internal predecessors, (2924), 219 states have call successors, (219), 148 states have call predecessors, (219), 180 states have return successors, (300), 238 states have call predecessors, (300), 218 states have call successors, (300) [2021-12-22 13:14:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 3443 transitions. [2021-12-22 13:14:02,959 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 3443 transitions. Word has length 167 [2021-12-22 13:14:02,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:02,960 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 3443 transitions. [2021-12-22 13:14:02,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:02,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 3443 transitions. [2021-12-22 13:14:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:14:02,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:02,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:02,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:14:02,963 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:02,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1489852588, now seen corresponding path program 1 times [2021-12-22 13:14:02,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:02,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495864766] [2021-12-22 13:14:02,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:02,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:02,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:14:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:03,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:03,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495864766] [2021-12-22 13:14:03,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495864766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:03,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:03,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:03,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615686454] [2021-12-22 13:14:03,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:03,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:03,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:03,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:03,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:03,066 INFO L87 Difference]: Start difference. First operand 2591 states and 3443 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:04,530 INFO L93 Difference]: Finished difference Result 4049 states and 5815 transitions. [2021-12-22 13:14:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:04,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:14:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:04,534 INFO L225 Difference]: With dead ends: 4049 [2021-12-22 13:14:04,534 INFO L226 Difference]: Without dead ends: 3041 [2021-12-22 13:14:04,536 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 [2021-12-22 13:14:04,536 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1251 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 1784 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:04,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1280 Valid, 1784 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:14:04,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-12-22 13:14:04,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2591. [2021-12-22 13:14:04,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2190 states have (on average 1.3337899543378995) internal successors, (2921), 2206 states have internal predecessors, (2921), 219 states have call successors, (219), 148 states have call predecessors, (219), 180 states have return successors, (300), 238 states have call predecessors, (300), 218 states have call successors, (300) [2021-12-22 13:14:04,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 3440 transitions. [2021-12-22 13:14:04,674 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 3440 transitions. Word has length 167 [2021-12-22 13:14:04,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:04,674 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 3440 transitions. [2021-12-22 13:14:04,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:04,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 3440 transitions. [2021-12-22 13:14:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:14:04,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:04,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:04,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:14:04,676 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:04,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:04,677 INFO L85 PathProgramCache]: Analyzing trace with hash 949423082, now seen corresponding path program 1 times [2021-12-22 13:14:04,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:04,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422371963] [2021-12-22 13:14:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:04,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:14:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:04,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:04,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422371963] [2021-12-22 13:14:04,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422371963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:04,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:04,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:04,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936445725] [2021-12-22 13:14:04,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:04,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:04,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:04,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:04,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:04,782 INFO L87 Difference]: Start difference. First operand 2591 states and 3440 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:06,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:06,206 INFO L93 Difference]: Finished difference Result 4045 states and 5798 transitions. [2021-12-22 13:14:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:06,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:14:06,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:06,211 INFO L225 Difference]: With dead ends: 4045 [2021-12-22 13:14:06,211 INFO L226 Difference]: Without dead ends: 3037 [2021-12-22 13:14:06,213 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 [2021-12-22 13:14:06,214 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 1327 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 1739 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:06,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1356 Valid, 1739 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:14:06,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-12-22 13:14:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2591. [2021-12-22 13:14:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2190 states have (on average 1.3324200913242008) internal successors, (2918), 2206 states have internal predecessors, (2918), 219 states have call successors, (219), 148 states have call predecessors, (219), 180 states have return successors, (300), 238 states have call predecessors, (300), 218 states have call successors, (300) [2021-12-22 13:14:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 3437 transitions. [2021-12-22 13:14:06,357 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 3437 transitions. Word has length 167 [2021-12-22 13:14:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:06,357 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 3437 transitions. [2021-12-22 13:14:06,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 3437 transitions. [2021-12-22 13:14:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:14:06,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:06,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:06,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:14:06,359 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:06,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:06,359 INFO L85 PathProgramCache]: Analyzing trace with hash 793442540, now seen corresponding path program 1 times [2021-12-22 13:14:06,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:06,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526223970] [2021-12-22 13:14:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:06,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:06,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:06,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:06,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:06,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:06,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:14:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:06,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:06,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526223970] [2021-12-22 13:14:06,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526223970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:06,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:06,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:06,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058403742] [2021-12-22 13:14:06,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:06,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:06,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:06,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:06,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:06,450 INFO L87 Difference]: Start difference. First operand 2591 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:09,067 INFO L93 Difference]: Finished difference Result 4949 states and 7221 transitions. [2021-12-22 13:14:09,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:14:09,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:14:09,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:09,079 INFO L225 Difference]: With dead ends: 4949 [2021-12-22 13:14:09,079 INFO L226 Difference]: Without dead ends: 3941 [2021-12-22 13:14:09,085 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 [2021-12-22 13:14:09,086 INFO L933 BasicCegarLoop]: 1026 mSDtfsCounter, 1662 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 3035 SdHoareTripleChecker+Invalid, 3088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:09,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1690 Valid, 3035 Invalid, 3088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2974 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-22 13:14:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3941 states. [2021-12-22 13:14:09,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3941 to 3251. [2021-12-22 13:14:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2796 states have (on average 1.3801859799713876) internal successors, (3859), 2814 states have internal predecessors, (3859), 259 states have call successors, (259), 160 states have call predecessors, (259), 194 states have return successors, (348), 280 states have call predecessors, (348), 258 states have call successors, (348) [2021-12-22 13:14:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4466 transitions. [2021-12-22 13:14:09,324 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4466 transitions. Word has length 167 [2021-12-22 13:14:09,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:09,324 INFO L470 AbstractCegarLoop]: Abstraction has 3251 states and 4466 transitions. [2021-12-22 13:14:09,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:09,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4466 transitions. [2021-12-22 13:14:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:14:09,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:09,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:09,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 13:14:09,327 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:09,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:09,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1204052906, now seen corresponding path program 1 times [2021-12-22 13:14:09,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:09,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801332472] [2021-12-22 13:14:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:09,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:14:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:09,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801332472] [2021-12-22 13:14:09,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801332472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:09,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:09,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:09,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896229600] [2021-12-22 13:14:09,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:09,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:09,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:09,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:09,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:09,428 INFO L87 Difference]: Start difference. First operand 3251 states and 4466 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:10,770 INFO L93 Difference]: Finished difference Result 5597 states and 8239 transitions. [2021-12-22 13:14:10,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:10,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:14:10,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:10,781 INFO L225 Difference]: With dead ends: 5597 [2021-12-22 13:14:10,781 INFO L226 Difference]: Without dead ends: 3929 [2021-12-22 13:14:10,785 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 [2021-12-22 13:14:10,785 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 1453 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 1541 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:10,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1482 Valid, 1541 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:14:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2021-12-22 13:14:10,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3251. [2021-12-22 13:14:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 2796 states have (on average 1.3783977110157368) internal successors, (3854), 2814 states have internal predecessors, (3854), 259 states have call successors, (259), 160 states have call predecessors, (259), 194 states have return successors, (348), 280 states have call predecessors, (348), 258 states have call successors, (348) [2021-12-22 13:14:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 4461 transitions. [2021-12-22 13:14:10,991 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 4461 transitions. Word has length 167 [2021-12-22 13:14:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:10,991 INFO L470 AbstractCegarLoop]: Abstraction has 3251 states and 4461 transitions. [2021-12-22 13:14:10,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:10,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 4461 transitions. [2021-12-22 13:14:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:14:10,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:10,993 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:10,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 13:14:10,994 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:10,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:10,994 INFO L85 PathProgramCache]: Analyzing trace with hash -583816916, now seen corresponding path program 1 times [2021-12-22 13:14:10,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:10,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127177784] [2021-12-22 13:14:10,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:10,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:14:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:11,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:11,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127177784] [2021-12-22 13:14:11,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127177784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:11,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:11,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:11,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107618555] [2021-12-22 13:14:11,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:11,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:11,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:11,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:11,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:11,124 INFO L87 Difference]: Start difference. First operand 3251 states and 4461 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:14,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:14,039 INFO L93 Difference]: Finished difference Result 7353 states and 10986 transitions. [2021-12-22 13:14:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:14:14,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:14:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:14,055 INFO L225 Difference]: With dead ends: 7353 [2021-12-22 13:14:14,055 INFO L226 Difference]: Without dead ends: 5685 [2021-12-22 13:14:14,060 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 [2021-12-22 13:14:14,061 INFO L933 BasicCegarLoop]: 1015 mSDtfsCounter, 1654 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 2947 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 3024 SdHoareTripleChecker+Invalid, 3061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:14,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 3024 Invalid, 3061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2947 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 13:14:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2021-12-22 13:14:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 4573. [2021-12-22 13:14:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 4010 states have (on average 1.428927680798005) internal successors, (5730), 4032 states have internal predecessors, (5730), 339 states have call successors, (339), 184 states have call predecessors, (339), 222 states have return successors, (450), 364 states have call predecessors, (450), 338 states have call successors, (450) [2021-12-22 13:14:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 6519 transitions. [2021-12-22 13:14:14,421 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 6519 transitions. Word has length 167 [2021-12-22 13:14:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:14,422 INFO L470 AbstractCegarLoop]: Abstraction has 4573 states and 6519 transitions. [2021-12-22 13:14:14,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:14,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 6519 transitions. [2021-12-22 13:14:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:14:14,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:14,424 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:14,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 13:14:14,424 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:14,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1575267178, now seen corresponding path program 1 times [2021-12-22 13:14:14,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:14,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703807479] [2021-12-22 13:14:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:14,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:14:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:14,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703807479] [2021-12-22 13:14:14,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703807479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:14,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:14,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:14,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144102972] [2021-12-22 13:14:14,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:14,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:14,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:14,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:14,535 INFO L87 Difference]: Start difference. First operand 4573 states and 6519 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:16,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:16,075 INFO L93 Difference]: Finished difference Result 8693 states and 13106 transitions. [2021-12-22 13:14:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:16,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:14:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:16,085 INFO L225 Difference]: With dead ends: 8693 [2021-12-22 13:14:16,085 INFO L226 Difference]: Without dead ends: 5703 [2021-12-22 13:14:16,090 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 [2021-12-22 13:14:16,090 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 1452 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:16,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1534 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:14:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2021-12-22 13:14:16,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 4573. [2021-12-22 13:14:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 4010 states have (on average 1.4266832917705736) internal successors, (5721), 4032 states have internal predecessors, (5721), 339 states have call successors, (339), 184 states have call predecessors, (339), 222 states have return successors, (450), 364 states have call predecessors, (450), 338 states have call successors, (450) [2021-12-22 13:14:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 6510 transitions. [2021-12-22 13:14:16,397 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 6510 transitions. Word has length 167 [2021-12-22 13:14:16,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:16,398 INFO L470 AbstractCegarLoop]: Abstraction has 4573 states and 6510 transitions. [2021-12-22 13:14:16,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 6510 transitions. [2021-12-22 13:14:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:14:16,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:16,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:16,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 13:14:16,401 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1644915052, now seen corresponding path program 1 times [2021-12-22 13:14:16,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:16,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531957316] [2021-12-22 13:14:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:16,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:14:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:16,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:16,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531957316] [2021-12-22 13:14:16,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531957316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:16,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:16,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:16,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752401195] [2021-12-22 13:14:16,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:16,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:16,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:16,508 INFO L87 Difference]: Start difference. First operand 4573 states and 6510 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:19,690 INFO L93 Difference]: Finished difference Result 12159 states and 18510 transitions. [2021-12-22 13:14:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:14:19,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:14:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:19,713 INFO L225 Difference]: With dead ends: 12159 [2021-12-22 13:14:19,713 INFO L226 Difference]: Without dead ends: 9169 [2021-12-22 13:14:19,720 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 [2021-12-22 13:14:19,720 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 1649 mSDsluCounter, 2009 mSDsCounter, 0 mSdLazyCounter, 2917 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 3011 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:19,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1677 Valid, 3011 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2917 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-22 13:14:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9169 states. [2021-12-22 13:14:20,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9169 to 7231. [2021-12-22 13:14:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7231 states, 6452 states have (on average 1.4694668319900805) internal successors, (9481), 6482 states have internal predecessors, (9481), 499 states have call successors, (499), 232 states have call predecessors, (499), 278 states have return successors, (672), 532 states have call predecessors, (672), 498 states have call successors, (672) [2021-12-22 13:14:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7231 states to 7231 states and 10652 transitions. [2021-12-22 13:14:20,293 INFO L78 Accepts]: Start accepts. Automaton has 7231 states and 10652 transitions. Word has length 167 [2021-12-22 13:14:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:20,293 INFO L470 AbstractCegarLoop]: Abstraction has 7231 states and 10652 transitions. [2021-12-22 13:14:20,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 7231 states and 10652 transitions. [2021-12-22 13:14:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:14:20,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:20,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:20,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 13:14:20,297 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:20,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2062803754, now seen corresponding path program 1 times [2021-12-22 13:14:20,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:20,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241158232] [2021-12-22 13:14:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:20,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:20,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:20,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:20,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:20,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:20,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:14:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:20,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:20,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241158232] [2021-12-22 13:14:20,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241158232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:20,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:20,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:20,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791804746] [2021-12-22 13:14:20,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:20,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:20,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:20,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:20,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:20,406 INFO L87 Difference]: Start difference. First operand 7231 states and 10652 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:22,356 INFO L93 Difference]: Finished difference Result 14867 states and 22821 transitions. [2021-12-22 13:14:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:22,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:14:22,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:22,376 INFO L225 Difference]: With dead ends: 14867 [2021-12-22 13:14:22,376 INFO L226 Difference]: Without dead ends: 9219 [2021-12-22 13:14:22,385 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 [2021-12-22 13:14:22,386 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 1452 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:22,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1523 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:14:22,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-12-22 13:14:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 7231. [2021-12-22 13:14:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7231 states, 6452 states have (on average 1.466831990080595) internal successors, (9464), 6482 states have internal predecessors, (9464), 499 states have call successors, (499), 232 states have call predecessors, (499), 278 states have return successors, (672), 532 states have call predecessors, (672), 498 states have call successors, (672) [2021-12-22 13:14:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7231 states to 7231 states and 10635 transitions. [2021-12-22 13:14:22,936 INFO L78 Accepts]: Start accepts. Automaton has 7231 states and 10635 transitions. Word has length 167 [2021-12-22 13:14:22,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:22,937 INFO L470 AbstractCegarLoop]: Abstraction has 7231 states and 10635 transitions. [2021-12-22 13:14:22,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:22,937 INFO L276 IsEmpty]: Start isEmpty. Operand 7231 states and 10635 transitions. [2021-12-22 13:14:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:14:22,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:22,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:22,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 13:14:22,941 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash 445363304, now seen corresponding path program 1 times [2021-12-22 13:14:22,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:22,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367830215] [2021-12-22 13:14:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:22,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:22,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:22,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:23,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:23,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:23,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:14:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:23,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:23,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367830215] [2021-12-22 13:14:23,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367830215] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:23,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:23,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:23,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559088318] [2021-12-22 13:14:23,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:23,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:23,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:23,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:23,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:23,034 INFO L87 Difference]: Start difference. First operand 7231 states and 10635 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:25,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:25,193 INFO L93 Difference]: Finished difference Result 14849 states and 22734 transitions. [2021-12-22 13:14:25,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:25,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:14:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:25,211 INFO L225 Difference]: With dead ends: 14849 [2021-12-22 13:14:25,212 INFO L226 Difference]: Without dead ends: 9201 [2021-12-22 13:14:25,221 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 [2021-12-22 13:14:25,222 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 1289 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1318 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:25,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1318 Valid, 1724 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:14:25,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9201 states. [2021-12-22 13:14:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9201 to 7231. [2021-12-22 13:14:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7231 states, 6452 states have (on average 1.4641971481711098) internal successors, (9447), 6482 states have internal predecessors, (9447), 499 states have call successors, (499), 232 states have call predecessors, (499), 278 states have return successors, (672), 532 states have call predecessors, (672), 498 states have call successors, (672) [2021-12-22 13:14:25,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7231 states to 7231 states and 10618 transitions. [2021-12-22 13:14:25,865 INFO L78 Accepts]: Start accepts. Automaton has 7231 states and 10618 transitions. Word has length 167 [2021-12-22 13:14:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:25,865 INFO L470 AbstractCegarLoop]: Abstraction has 7231 states and 10618 transitions. [2021-12-22 13:14:25,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 7231 states and 10618 transitions. [2021-12-22 13:14:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-22 13:14:25,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:25,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:25,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 13:14:25,869 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:25,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:25,869 INFO L85 PathProgramCache]: Analyzing trace with hash 808829802, now seen corresponding path program 1 times [2021-12-22 13:14:25,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:25,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540399550] [2021-12-22 13:14:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:25,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 13:14:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-22 13:14:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-22 13:14:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-22 13:14:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:25,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540399550] [2021-12-22 13:14:25,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540399550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:25,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:25,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:25,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544796676] [2021-12-22 13:14:25,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:25,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:25,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:25,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:25,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:25,966 INFO L87 Difference]: Start difference. First operand 7231 states and 10618 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:30,836 INFO L93 Difference]: Finished difference Result 24153 states and 37152 transitions. [2021-12-22 13:14:30,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 13:14:30,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 167 [2021-12-22 13:14:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:30,872 INFO L225 Difference]: With dead ends: 24153 [2021-12-22 13:14:30,873 INFO L226 Difference]: Without dead ends: 18505 [2021-12-22 13:14:30,884 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 [2021-12-22 13:14:30,885 INFO L933 BasicCegarLoop]: 978 mSDtfsCounter, 2037 mSDsluCounter, 1998 mSDsCounter, 0 mSdLazyCounter, 2853 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2077 SdHoareTripleChecker+Valid, 2976 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:30,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2077 Valid, 2976 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2853 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 13:14:30,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18505 states.