/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:23:24,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:23:24,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:23:24,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:23:24,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:23:24,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:23:24,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:23:24,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:23:24,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:23:24,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:23:24,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:23:24,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:23:24,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:23:24,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:23:24,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:23:24,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:23:24,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:23:24,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:23:24,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:23:24,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:23:24,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:23:24,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:23:24,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:23:24,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:23:24,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 08:23:24,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 08:23:24,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 08:23:24,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 08:23:24,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 08:23:24,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 08:23:24,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 08:23:24,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 08:23:24,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 08:23:24,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 08:23:24,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 08:23:24,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 08:23:24,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 08:23:24,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 08:23:24,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:23:24,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:23:24,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:23:24,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 08:23:24,317 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:23:24,317 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:23:24,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:23:24,318 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:23:24,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:23:24,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:23:24,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:23:24,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:23:24,321 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:23:24,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:23:24,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:23:24,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:23:24,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:23:24,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:23:24,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:23:24,321 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:23:24,321 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:23:24,321 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:23:24,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:23:24,322 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:23:24,322 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:23:24,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:23:24,322 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:23:24,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:23:24,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:23:24,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:23:24,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:23:24,322 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:23:24,322 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:23:24,323 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:23:24,323 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:23:24,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:23:24,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:23:24,323 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:23:24,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:23:24,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:23:24,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:23:24,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:23:24,497 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:23:24,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c [2022-01-10 08:23:24,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f112b41/e434c85978884fb8ab43715905eea4d9/FLAG985a7a83e [2022-01-10 08:23:24,922 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:23:24,923 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c [2022-01-10 08:23:24,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f112b41/e434c85978884fb8ab43715905eea4d9/FLAG985a7a83e [2022-01-10 08:23:24,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61f112b41/e434c85978884fb8ab43715905eea4d9 [2022-01-10 08:23:24,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:23:24,955 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:23:24,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:23:24,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:23:24,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:23:24,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:23:24" (1/1) ... [2022-01-10 08:23:24,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f3f8333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:24, skipping insertion in model container [2022-01-10 08:23:24,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:23:24" (1/1) ... [2022-01-10 08:23:24,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:23:25,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:23:25,155 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[911,924] [2022-01-10 08:23:25,191 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[8416,8429] [2022-01-10 08:23:25,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:23:25,249 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:23:25,256 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[911,924] [2022-01-10 08:23:25,271 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.07.cil-2.c[8416,8429] [2022-01-10 08:23:25,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:23:25,322 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:23:25,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25 WrapperNode [2022-01-10 08:23:25,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:23:25,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:23:25,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:23:25,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:23:25,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25" (1/1) ... [2022-01-10 08:23:25,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25" (1/1) ... [2022-01-10 08:23:25,373 INFO L137 Inliner]: procedures = 70, calls = 83, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 762 [2022-01-10 08:23:25,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:23:25,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:23:25,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:23:25,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:23:25,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25" (1/1) ... [2022-01-10 08:23:25,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25" (1/1) ... [2022-01-10 08:23:25,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25" (1/1) ... [2022-01-10 08:23:25,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25" (1/1) ... [2022-01-10 08:23:25,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25" (1/1) ... [2022-01-10 08:23:25,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25" (1/1) ... [2022-01-10 08:23:25,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25" (1/1) ... [2022-01-10 08:23:25,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:23:25,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:23:25,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:23:25,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:23:25,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25" (1/1) ... [2022-01-10 08:23:25,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:23:25,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:23:25,442 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) [2022-01-10 08:23:25,443 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 [2022-01-10 08:23:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:23:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 08:23:25,468 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 08:23:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-01-10 08:23:25,468 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-01-10 08:23:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 08:23:25,468 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 08:23:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 08:23:25,468 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 08:23:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-01-10 08:23:25,468 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-01-10 08:23:25,468 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 08:23:25,469 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 08:23:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 08:23:25,469 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 08:23:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-01-10 08:23:25,469 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-01-10 08:23:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:23:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-01-10 08:23:25,469 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-01-10 08:23:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-01-10 08:23:25,469 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-01-10 08:23:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 08:23:25,469 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 08:23:25,469 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 08:23:25,470 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 08:23:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-01-10 08:23:25,470 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-01-10 08:23:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:23:25,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:23:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 08:23:25,470 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 08:23:25,470 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-01-10 08:23:25,470 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-01-10 08:23:25,585 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:23:25,586 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:23:26,067 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1bv32 == ~q_free~0); [2022-01-10 08:23:26,068 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1bv32 == ~q_free~0;~c_dr_st~0 := 2bv32;~c_dr_pc~0 := 2bv32;~a_t~0 := do_read_c_~a~0#1; [2022-01-10 08:23:26,133 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:23:26,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:23:26,147 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2022-01-10 08:23:26,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:23:26 BoogieIcfgContainer [2022-01-10 08:23:26,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:23:26,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:23:26,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:23:26,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:23:26,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:23:24" (1/3) ... [2022-01-10 08:23:26,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c530d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:23:26, skipping insertion in model container [2022-01-10 08:23:26,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:23:25" (2/3) ... [2022-01-10 08:23:26,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c530d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:23:26, skipping insertion in model container [2022-01-10 08:23:26,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:23:26" (3/3) ... [2022-01-10 08:23:26,156 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.07.cil-2.c [2022-01-10 08:23:26,159 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:23:26,159 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:23:26,208 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:23:26,213 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 [2022-01-10 08:23:26,213 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:23:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 382 states, 325 states have (on average 1.6184615384615384) internal successors, (526), 333 states have internal predecessors, (526), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-01-10 08:23:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:23:26,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:26,248 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] [2022-01-10 08:23:26,248 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:26,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:26,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1097425506, now seen corresponding path program 1 times [2022-01-10 08:23:26,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:26,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938425151] [2022-01-10 08:23:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:26,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:26,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:26,263 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:26,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 08:23:26,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:26,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:26,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:26,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:26,573 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:26,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938425151] [2022-01-10 08:23:26,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938425151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:26,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:26,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:26,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60286030] [2022-01-10 08:23:26,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:26,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:26,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:26,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:26,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:26,616 INFO L87 Difference]: Start difference. First operand has 382 states, 325 states have (on average 1.6184615384615384) internal successors, (526), 333 states have internal predecessors, (526), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:26,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:26,712 INFO L93 Difference]: Finished difference Result 740 states and 1169 transitions. [2022-01-10 08:23:26,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:23:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:26,743 INFO L225 Difference]: With dead ends: 740 [2022-01-10 08:23:26,743 INFO L226 Difference]: Without dead ends: 371 [2022-01-10 08:23:26,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:26,757 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 153 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:26,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 973 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:26,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-01-10 08:23:26,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-01-10 08:23:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 317 states have (on average 1.5299684542586751) internal successors, (485), 322 states have internal predecessors, (485), 39 states have call successors, (39), 15 states have call predecessors, (39), 13 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-10 08:23:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 559 transitions. [2022-01-10 08:23:26,845 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 559 transitions. Word has length 65 [2022-01-10 08:23:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:26,846 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 559 transitions. [2022-01-10 08:23:26,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 559 transitions. [2022-01-10 08:23:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:23:26,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:26,849 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] [2022-01-10 08:23:26,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:27,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:27,056 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:27,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:27,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1810756380, now seen corresponding path program 1 times [2022-01-10 08:23:27,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:27,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258804963] [2022-01-10 08:23:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:27,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:27,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:27,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:27,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 08:23:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 08:23:27,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:27,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:27,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:27,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258804963] [2022-01-10 08:23:27,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258804963] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:27,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:27,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:27,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675018725] [2022-01-10 08:23:27,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:27,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:27,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:27,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:27,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:27,340 INFO L87 Difference]: Start difference. First operand 371 states and 559 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:27,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:27,959 INFO L93 Difference]: Finished difference Result 594 states and 880 transitions. [2022-01-10 08:23:27,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:27,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:23:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:27,965 INFO L225 Difference]: With dead ends: 594 [2022-01-10 08:23:27,965 INFO L226 Difference]: Without dead ends: 490 [2022-01-10 08:23:27,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:27,967 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 412 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:27,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 1426 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 08:23:27,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-10 08:23:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 483. [2022-01-10 08:23:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 407 states have (on average 1.5012285012285012) internal successors, (611), 414 states have internal predecessors, (611), 52 states have call successors, (52), 22 states have call predecessors, (52), 22 states have return successors, (53), 49 states have call predecessors, (53), 48 states have call successors, (53) [2022-01-10 08:23:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 716 transitions. [2022-01-10 08:23:28,006 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 716 transitions. Word has length 65 [2022-01-10 08:23:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:28,007 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 716 transitions. [2022-01-10 08:23:28,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 716 transitions. [2022-01-10 08:23:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:23:28,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:28,014 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] [2022-01-10 08:23:28,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:28,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:28,220 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:28,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:28,220 INFO L85 PathProgramCache]: Analyzing trace with hash -805322276, now seen corresponding path program 1 times [2022-01-10 08:23:28,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:28,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316180434] [2022-01-10 08:23:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:28,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:28,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:28,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:28,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 08:23:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:28,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:23:28,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:28,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:28,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:28,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316180434] [2022-01-10 08:23:28,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316180434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:28,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:28,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:28,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66192686] [2022-01-10 08:23:28,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:28,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:28,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:28,406 INFO L87 Difference]: Start difference. First operand 483 states and 716 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:28,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:28,935 INFO L93 Difference]: Finished difference Result 939 states and 1374 transitions. [2022-01-10 08:23:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:28,936 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:23:28,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:28,939 INFO L225 Difference]: With dead ends: 939 [2022-01-10 08:23:28,939 INFO L226 Difference]: Without dead ends: 728 [2022-01-10 08:23:28,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:28,941 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 404 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:28,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 1431 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 08:23:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-01-10 08:23:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 720. [2022-01-10 08:23:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 596 states have (on average 1.4580536912751678) internal successors, (869), 611 states have internal predecessors, (869), 78 states have call successors, (78), 36 states have call predecessors, (78), 44 states have return successors, (99), 77 states have call predecessors, (99), 74 states have call successors, (99) [2022-01-10 08:23:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1046 transitions. [2022-01-10 08:23:28,964 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1046 transitions. Word has length 65 [2022-01-10 08:23:28,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:28,964 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 1046 transitions. [2022-01-10 08:23:28,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:28,964 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1046 transitions. [2022-01-10 08:23:28,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:23:28,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:28,965 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] [2022-01-10 08:23:28,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:29,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:29,174 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1327045404, now seen corresponding path program 1 times [2022-01-10 08:23:29,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:29,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1312956632] [2022-01-10 08:23:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:29,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:29,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:29,176 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:29,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 08:23:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:29,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:29,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:29,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:29,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:29,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1312956632] [2022-01-10 08:23:29,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1312956632] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:29,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:29,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:29,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802219659] [2022-01-10 08:23:29,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:29,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:29,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:29,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:29,376 INFO L87 Difference]: Start difference. First operand 720 states and 1046 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:29,432 INFO L93 Difference]: Finished difference Result 1556 states and 2203 transitions. [2022-01-10 08:23:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:23:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:29,437 INFO L225 Difference]: With dead ends: 1556 [2022-01-10 08:23:29,437 INFO L226 Difference]: Without dead ends: 1122 [2022-01-10 08:23:29,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:29,439 INFO L933 BasicCegarLoop]: 590 mSDtfsCounter, 523 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:29,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 719 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-01-10 08:23:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1110. [2022-01-10 08:23:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 908 states have (on average 1.420704845814978) internal successors, (1290), 933 states have internal predecessors, (1290), 118 states have call successors, (118), 64 states have call predecessors, (118), 82 states have return successors, (156), 117 states have call predecessors, (156), 114 states have call successors, (156) [2022-01-10 08:23:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1564 transitions. [2022-01-10 08:23:29,494 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1564 transitions. Word has length 65 [2022-01-10 08:23:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:29,495 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1564 transitions. [2022-01-10 08:23:29,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1564 transitions. [2022-01-10 08:23:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:23:29,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:29,496 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] [2022-01-10 08:23:29,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:29,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:29,703 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:29,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:29,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1505320465, now seen corresponding path program 1 times [2022-01-10 08:23:29,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:29,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338735114] [2022-01-10 08:23:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:29,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:29,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:29,705 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:29,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 08:23:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:29,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:23:29,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:29,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:29,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338735114] [2022-01-10 08:23:29,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338735114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:29,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:29,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:23:29,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939677717] [2022-01-10 08:23:29,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:29,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:23:29,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:23:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:29,869 INFO L87 Difference]: Start difference. First operand 1110 states and 1564 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:29,916 INFO L93 Difference]: Finished difference Result 1974 states and 2758 transitions. [2022-01-10 08:23:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:29,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-01-10 08:23:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:29,921 INFO L225 Difference]: With dead ends: 1974 [2022-01-10 08:23:29,921 INFO L226 Difference]: Without dead ends: 1150 [2022-01-10 08:23:29,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:23:29,923 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 7 mSDsluCounter, 2225 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:29,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2783 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2022-01-10 08:23:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1130. [2022-01-10 08:23:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 924 states have (on average 1.4090909090909092) internal successors, (1302), 949 states have internal predecessors, (1302), 118 states have call successors, (118), 64 states have call predecessors, (118), 86 states have return successors, (160), 121 states have call predecessors, (160), 114 states have call successors, (160) [2022-01-10 08:23:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1580 transitions. [2022-01-10 08:23:29,973 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1580 transitions. Word has length 66 [2022-01-10 08:23:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:29,974 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 1580 transitions. [2022-01-10 08:23:29,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1580 transitions. [2022-01-10 08:23:29,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:23:29,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:29,975 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] [2022-01-10 08:23:29,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:30,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:30,184 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash 475961167, now seen corresponding path program 1 times [2022-01-10 08:23:30,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:30,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76647250] [2022-01-10 08:23:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:30,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:30,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:30,186 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:30,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 08:23:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:30,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:30,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:30,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:30,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:30,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76647250] [2022-01-10 08:23:30,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76647250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:30,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:30,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:30,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615667631] [2022-01-10 08:23:30,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:30,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:30,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:30,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:30,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:30,362 INFO L87 Difference]: Start difference. First operand 1130 states and 1580 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:30,416 INFO L93 Difference]: Finished difference Result 2746 states and 3760 transitions. [2022-01-10 08:23:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:30,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-01-10 08:23:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:30,423 INFO L225 Difference]: With dead ends: 2746 [2022-01-10 08:23:30,423 INFO L226 Difference]: Without dead ends: 1902 [2022-01-10 08:23:30,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:30,428 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 509 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:30,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 698 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:30,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2022-01-10 08:23:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1886. [2022-01-10 08:23:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1520 states have (on average 1.3697368421052631) internal successors, (2082), 1565 states have internal predecessors, (2082), 198 states have call successors, (198), 120 states have call predecessors, (198), 166 states have return successors, (278), 205 states have call predecessors, (278), 194 states have call successors, (278) [2022-01-10 08:23:30,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2558 transitions. [2022-01-10 08:23:30,491 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2558 transitions. Word has length 66 [2022-01-10 08:23:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:30,492 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 2558 transitions. [2022-01-10 08:23:30,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:23:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2558 transitions. [2022-01-10 08:23:30,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 08:23:30,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:30,495 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:23:30,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:30,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:30,701 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:30,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:30,702 INFO L85 PathProgramCache]: Analyzing trace with hash -641481318, now seen corresponding path program 1 times [2022-01-10 08:23:30,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:30,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067214454] [2022-01-10 08:23:30,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:30,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:30,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:30,703 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:30,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 08:23:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:30,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:30,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 08:23:30,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:30,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:30,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067214454] [2022-01-10 08:23:30,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067214454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:30,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:30,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:30,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628070818] [2022-01-10 08:23:30,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:30,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:23:30,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:30,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:23:30,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:23:30,885 INFO L87 Difference]: Start difference. First operand 1886 states and 2558 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:23:31,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:31,200 INFO L93 Difference]: Finished difference Result 5034 states and 6785 transitions. [2022-01-10 08:23:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:31,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 83 [2022-01-10 08:23:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:31,216 INFO L225 Difference]: With dead ends: 5034 [2022-01-10 08:23:31,216 INFO L226 Difference]: Without dead ends: 3438 [2022-01-10 08:23:31,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:31,222 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 757 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:31,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 866 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:23:31,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3438 states. [2022-01-10 08:23:31,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3438 to 3434. [2022-01-10 08:23:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 2720 states have (on average 1.3316176470588235) internal successors, (3622), 2817 states have internal predecessors, (3622), 378 states have call successors, (378), 232 states have call predecessors, (378), 334 states have return successors, (603), 393 states have call predecessors, (603), 374 states have call successors, (603) [2022-01-10 08:23:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 4603 transitions. [2022-01-10 08:23:31,328 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 4603 transitions. Word has length 83 [2022-01-10 08:23:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:31,328 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 4603 transitions. [2022-01-10 08:23:31,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:23:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 4603 transitions. [2022-01-10 08:23:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 08:23:31,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:31,332 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, 1] [2022-01-10 08:23:31,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:31,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:31,544 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:31,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1385013714, now seen corresponding path program 1 times [2022-01-10 08:23:31,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:31,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889992018] [2022-01-10 08:23:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:31,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:31,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:31,546 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:31,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 08:23:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:31,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:31,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:31,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:31,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:31,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889992018] [2022-01-10 08:23:31,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889992018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:31,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:31,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:31,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209907385] [2022-01-10 08:23:31,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:31,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:31,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:31,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:31,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:31,699 INFO L87 Difference]: Start difference. First operand 3434 states and 4603 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:23:31,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:31,807 INFO L93 Difference]: Finished difference Result 6558 states and 8814 transitions. [2022-01-10 08:23:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:31,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2022-01-10 08:23:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:31,832 INFO L225 Difference]: With dead ends: 6558 [2022-01-10 08:23:31,833 INFO L226 Difference]: Without dead ends: 4914 [2022-01-10 08:23:31,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:31,839 INFO L933 BasicCegarLoop]: 672 mSDtfsCounter, 109 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:31,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 1223 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4914 states. [2022-01-10 08:23:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4914 to 4914. [2022-01-10 08:23:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4914 states, 3872 states have (on average 1.3207644628099173) internal successors, (5114), 4013 states have internal predecessors, (5114), 542 states have call successors, (542), 344 states have call predecessors, (542), 498 states have return successors, (915), 565 states have call predecessors, (915), 538 states have call successors, (915) [2022-01-10 08:23:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4914 states to 4914 states and 6571 transitions. [2022-01-10 08:23:31,995 INFO L78 Accepts]: Start accepts. Automaton has 4914 states and 6571 transitions. Word has length 85 [2022-01-10 08:23:31,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:31,995 INFO L470 AbstractCegarLoop]: Abstraction has 4914 states and 6571 transitions. [2022-01-10 08:23:31,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:23:31,996 INFO L276 IsEmpty]: Start isEmpty. Operand 4914 states and 6571 transitions. [2022-01-10 08:23:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:32,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:32,004 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] [2022-01-10 08:23:32,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:32,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:32,211 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:32,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:32,212 INFO L85 PathProgramCache]: Analyzing trace with hash 959549796, now seen corresponding path program 1 times [2022-01-10 08:23:32,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:32,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365268672] [2022-01-10 08:23:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:32,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:32,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:32,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:32,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 08:23:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:32,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:32,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:32,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:32,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:32,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365268672] [2022-01-10 08:23:32,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365268672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:32,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:32,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:32,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405704990] [2022-01-10 08:23:32,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:32,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:32,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:32,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:32,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:32,421 INFO L87 Difference]: Start difference. First operand 4914 states and 6571 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:32,518 INFO L93 Difference]: Finished difference Result 5167 states and 6965 transitions. [2022-01-10 08:23:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:32,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:32,536 INFO L225 Difference]: With dead ends: 5167 [2022-01-10 08:23:32,537 INFO L226 Difference]: Without dead ends: 4914 [2022-01-10 08:23:32,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:32,541 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 394 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:32,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 714 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4914 states. [2022-01-10 08:23:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4914 to 4914. [2022-01-10 08:23:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4914 states, 3872 states have (on average 1.3205061983471074) internal successors, (5113), 4013 states have internal predecessors, (5113), 542 states have call successors, (542), 344 states have call predecessors, (542), 498 states have return successors, (915), 565 states have call predecessors, (915), 538 states have call successors, (915) [2022-01-10 08:23:32,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4914 states to 4914 states and 6570 transitions. [2022-01-10 08:23:32,689 INFO L78 Accepts]: Start accepts. Automaton has 4914 states and 6570 transitions. Word has length 124 [2022-01-10 08:23:32,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:32,689 INFO L470 AbstractCegarLoop]: Abstraction has 4914 states and 6570 transitions. [2022-01-10 08:23:32,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:32,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4914 states and 6570 transitions. [2022-01-10 08:23:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:32,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:32,699 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] [2022-01-10 08:23:32,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:32,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:32,907 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1292192934, now seen corresponding path program 1 times [2022-01-10 08:23:32,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:32,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027509354] [2022-01-10 08:23:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:32,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:32,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:32,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:32,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 08:23:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:33,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:33,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:33,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:33,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:33,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027509354] [2022-01-10 08:23:33,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027509354] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:33,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:33,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:33,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969565874] [2022-01-10 08:23:33,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:33,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:33,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:33,175 INFO L87 Difference]: Start difference. First operand 4914 states and 6570 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:33,718 INFO L93 Difference]: Finished difference Result 5430 states and 7382 transitions. [2022-01-10 08:23:33,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:33,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:33,736 INFO L225 Difference]: With dead ends: 5430 [2022-01-10 08:23:33,736 INFO L226 Difference]: Without dead ends: 5186 [2022-01-10 08:23:33,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:33,740 INFO L933 BasicCegarLoop]: 574 mSDtfsCounter, 936 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 1500 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:33,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 1500 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:23:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5186 states. [2022-01-10 08:23:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5186 to 5165. [2022-01-10 08:23:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5165 states, 4100 states have (on average 1.3351219512195123) internal successors, (5474), 4242 states have internal predecessors, (5474), 558 states have call successors, (558), 350 states have call predecessors, (558), 505 states have return successors, (932), 581 states have call predecessors, (932), 554 states have call successors, (932) [2022-01-10 08:23:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6964 transitions. [2022-01-10 08:23:33,940 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6964 transitions. Word has length 124 [2022-01-10 08:23:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:33,940 INFO L470 AbstractCegarLoop]: Abstraction has 5165 states and 6964 transitions. [2022-01-10 08:23:33,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6964 transitions. [2022-01-10 08:23:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:33,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:33,952 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] [2022-01-10 08:23:33,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:34,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:34,160 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:34,161 INFO L85 PathProgramCache]: Analyzing trace with hash 274544546, now seen corresponding path program 1 times [2022-01-10 08:23:34,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:34,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100045373] [2022-01-10 08:23:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:34,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:34,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:34,162 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:34,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 08:23:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:34,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:34,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:34,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:34,419 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:34,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100045373] [2022-01-10 08:23:34,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100045373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:34,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:34,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:34,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252698475] [2022-01-10 08:23:34,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:34,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:34,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:34,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:34,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:34,421 INFO L87 Difference]: Start difference. First operand 5165 states and 6964 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:34,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:34,810 INFO L93 Difference]: Finished difference Result 5660 states and 7742 transitions. [2022-01-10 08:23:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:23:34,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:34,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:34,839 INFO L225 Difference]: With dead ends: 5660 [2022-01-10 08:23:34,839 INFO L226 Difference]: Without dead ends: 5165 [2022-01-10 08:23:34,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:34,844 INFO L933 BasicCegarLoop]: 517 mSDtfsCounter, 726 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:34,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1086 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:34,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2022-01-10 08:23:35,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5165. [2022-01-10 08:23:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5165 states, 4100 states have (on average 1.3334146341463415) internal successors, (5467), 4242 states have internal predecessors, (5467), 558 states have call successors, (558), 350 states have call predecessors, (558), 505 states have return successors, (932), 581 states have call predecessors, (932), 554 states have call successors, (932) [2022-01-10 08:23:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6957 transitions. [2022-01-10 08:23:35,020 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6957 transitions. Word has length 124 [2022-01-10 08:23:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:35,020 INFO L470 AbstractCegarLoop]: Abstraction has 5165 states and 6957 transitions. [2022-01-10 08:23:35,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6957 transitions. [2022-01-10 08:23:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:35,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:35,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:35,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:35,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:35,239 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:35,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:35,239 INFO L85 PathProgramCache]: Analyzing trace with hash -451019482, now seen corresponding path program 1 times [2022-01-10 08:23:35,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:35,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042029589] [2022-01-10 08:23:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:35,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:35,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:35,241 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:35,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 08:23:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:35,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:35,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:35,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:35,491 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:35,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042029589] [2022-01-10 08:23:35,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042029589] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:35,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:35,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:35,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967724216] [2022-01-10 08:23:35,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:35,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:35,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:35,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:35,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:35,492 INFO L87 Difference]: Start difference. First operand 5165 states and 6957 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:35,915 INFO L93 Difference]: Finished difference Result 5660 states and 7728 transitions. [2022-01-10 08:23:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:23:35,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:35,941 INFO L225 Difference]: With dead ends: 5660 [2022-01-10 08:23:35,941 INFO L226 Difference]: Without dead ends: 5165 [2022-01-10 08:23:35,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:35,947 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 720 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:35,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 1079 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2022-01-10 08:23:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5165. [2022-01-10 08:23:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5165 states, 4100 states have (on average 1.3317073170731708) internal successors, (5460), 4242 states have internal predecessors, (5460), 558 states have call successors, (558), 350 states have call predecessors, (558), 505 states have return successors, (932), 581 states have call predecessors, (932), 554 states have call successors, (932) [2022-01-10 08:23:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6950 transitions. [2022-01-10 08:23:36,112 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6950 transitions. Word has length 124 [2022-01-10 08:23:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:36,113 INFO L470 AbstractCegarLoop]: Abstraction has 5165 states and 6950 transitions. [2022-01-10 08:23:36,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:36,113 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6950 transitions. [2022-01-10 08:23:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:36,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:36,122 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] [2022-01-10 08:23:36,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:36,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:36,329 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:36,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1305708766, now seen corresponding path program 1 times [2022-01-10 08:23:36,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:36,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049202264] [2022-01-10 08:23:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:36,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:36,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:36,331 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:36,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 08:23:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:36,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:36,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:36,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:36,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:36,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049202264] [2022-01-10 08:23:36,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049202264] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:36,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:36,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:36,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345608278] [2022-01-10 08:23:36,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:36,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:36,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:36,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:36,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:36,578 INFO L87 Difference]: Start difference. First operand 5165 states and 6950 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:36,996 INFO L93 Difference]: Finished difference Result 5660 states and 7714 transitions. [2022-01-10 08:23:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:23:36,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:37,010 INFO L225 Difference]: With dead ends: 5660 [2022-01-10 08:23:37,010 INFO L226 Difference]: Without dead ends: 5165 [2022-01-10 08:23:37,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:37,016 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 714 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:37,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 1072 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2022-01-10 08:23:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5165. [2022-01-10 08:23:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5165 states, 4100 states have (on average 1.33) internal successors, (5453), 4242 states have internal predecessors, (5453), 558 states have call successors, (558), 350 states have call predecessors, (558), 505 states have return successors, (932), 581 states have call predecessors, (932), 554 states have call successors, (932) [2022-01-10 08:23:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6943 transitions. [2022-01-10 08:23:37,205 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6943 transitions. Word has length 124 [2022-01-10 08:23:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:37,205 INFO L470 AbstractCegarLoop]: Abstraction has 5165 states and 6943 transitions. [2022-01-10 08:23:37,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6943 transitions. [2022-01-10 08:23:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:37,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:37,213 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] [2022-01-10 08:23:37,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:37,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:37,421 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:37,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:37,421 INFO L85 PathProgramCache]: Analyzing trace with hash 955864484, now seen corresponding path program 1 times [2022-01-10 08:23:37,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:37,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392846103] [2022-01-10 08:23:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:37,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:37,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:37,422 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:37,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 08:23:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:37,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:37,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:37,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:37,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:37,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392846103] [2022-01-10 08:23:37,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392846103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:37,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:37,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:37,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95583049] [2022-01-10 08:23:37,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:37,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:37,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:37,677 INFO L87 Difference]: Start difference. First operand 5165 states and 6943 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:38,077 INFO L93 Difference]: Finished difference Result 5660 states and 7700 transitions. [2022-01-10 08:23:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:23:38,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:38,092 INFO L225 Difference]: With dead ends: 5660 [2022-01-10 08:23:38,093 INFO L226 Difference]: Without dead ends: 5165 [2022-01-10 08:23:38,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:38,096 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 707 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:38,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1065 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2022-01-10 08:23:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5165. [2022-01-10 08:23:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5165 states, 4100 states have (on average 1.3282926829268293) internal successors, (5446), 4242 states have internal predecessors, (5446), 558 states have call successors, (558), 350 states have call predecessors, (558), 505 states have return successors, (932), 581 states have call predecessors, (932), 554 states have call successors, (932) [2022-01-10 08:23:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6936 transitions. [2022-01-10 08:23:38,278 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6936 transitions. Word has length 124 [2022-01-10 08:23:38,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:38,278 INFO L470 AbstractCegarLoop]: Abstraction has 5165 states and 6936 transitions. [2022-01-10 08:23:38,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6936 transitions. [2022-01-10 08:23:38,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:38,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:38,288 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] [2022-01-10 08:23:38,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:38,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:38,495 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:38,495 INFO L85 PathProgramCache]: Analyzing trace with hash 350321960, now seen corresponding path program 1 times [2022-01-10 08:23:38,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:38,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745859337] [2022-01-10 08:23:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:38,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:38,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:38,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:38,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 08:23:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:38,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:38,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:38,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:38,756 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:38,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745859337] [2022-01-10 08:23:38,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745859337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:38,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:38,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:38,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120624299] [2022-01-10 08:23:38,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:38,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:38,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:38,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:38,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:38,757 INFO L87 Difference]: Start difference. First operand 5165 states and 6936 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:39,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:39,197 INFO L93 Difference]: Finished difference Result 5660 states and 7686 transitions. [2022-01-10 08:23:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:23:39,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:39,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:39,209 INFO L225 Difference]: With dead ends: 5660 [2022-01-10 08:23:39,209 INFO L226 Difference]: Without dead ends: 5165 [2022-01-10 08:23:39,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:39,213 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 701 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:39,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1058 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:39,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2022-01-10 08:23:39,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5165. [2022-01-10 08:23:39,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5165 states, 4100 states have (on average 1.3265853658536586) internal successors, (5439), 4242 states have internal predecessors, (5439), 558 states have call successors, (558), 350 states have call predecessors, (558), 505 states have return successors, (932), 581 states have call predecessors, (932), 554 states have call successors, (932) [2022-01-10 08:23:39,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6929 transitions. [2022-01-10 08:23:39,375 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6929 transitions. Word has length 124 [2022-01-10 08:23:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:39,376 INFO L470 AbstractCegarLoop]: Abstraction has 5165 states and 6929 transitions. [2022-01-10 08:23:39,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:39,376 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6929 transitions. [2022-01-10 08:23:39,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:39,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:39,386 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] [2022-01-10 08:23:39,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:39,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:39,594 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2024516316, now seen corresponding path program 1 times [2022-01-10 08:23:39,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:39,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048388496] [2022-01-10 08:23:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:39,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:39,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:39,595 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:39,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 08:23:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:39,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:39,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:39,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:39,839 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:39,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048388496] [2022-01-10 08:23:39,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048388496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:39,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:39,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:39,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454588824] [2022-01-10 08:23:39,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:39,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:39,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:39,841 INFO L87 Difference]: Start difference. First operand 5165 states and 6929 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:40,240 INFO L93 Difference]: Finished difference Result 5660 states and 7672 transitions. [2022-01-10 08:23:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:23:40,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:40,254 INFO L225 Difference]: With dead ends: 5660 [2022-01-10 08:23:40,254 INFO L226 Difference]: Without dead ends: 5165 [2022-01-10 08:23:40,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:40,257 INFO L933 BasicCegarLoop]: 502 mSDtfsCounter, 695 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:40,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 1051 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:40,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2022-01-10 08:23:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5165. [2022-01-10 08:23:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5165 states, 4100 states have (on average 1.3248780487804879) internal successors, (5432), 4242 states have internal predecessors, (5432), 558 states have call successors, (558), 350 states have call predecessors, (558), 505 states have return successors, (932), 581 states have call predecessors, (932), 554 states have call successors, (932) [2022-01-10 08:23:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6922 transitions. [2022-01-10 08:23:40,464 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6922 transitions. Word has length 124 [2022-01-10 08:23:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:40,464 INFO L470 AbstractCegarLoop]: Abstraction has 5165 states and 6922 transitions. [2022-01-10 08:23:40,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6922 transitions. [2022-01-10 08:23:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:40,472 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:40,472 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] [2022-01-10 08:23:40,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:40,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:40,680 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:40,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:40,681 INFO L85 PathProgramCache]: Analyzing trace with hash 392727976, now seen corresponding path program 1 times [2022-01-10 08:23:40,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:40,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [474864152] [2022-01-10 08:23:40,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:40,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:40,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:40,682 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:40,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 08:23:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:40,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:40,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:40,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:40,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [474864152] [2022-01-10 08:23:40,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [474864152] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:40,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:40,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:40,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631500288] [2022-01-10 08:23:40,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:40,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:40,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:40,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:40,920 INFO L87 Difference]: Start difference. First operand 5165 states and 6922 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:41,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:41,441 INFO L93 Difference]: Finished difference Result 5782 states and 7846 transitions. [2022-01-10 08:23:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:41,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:41,454 INFO L225 Difference]: With dead ends: 5782 [2022-01-10 08:23:41,455 INFO L226 Difference]: Without dead ends: 5287 [2022-01-10 08:23:41,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:41,457 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 765 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:41,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 1043 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:23:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5287 states. [2022-01-10 08:23:41,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5287 to 5287. [2022-01-10 08:23:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5287 states, 4216 states have (on average 1.3251897533206831) internal successors, (5587), 4358 states have internal predecessors, (5587), 560 states have call successors, (560), 354 states have call predecessors, (560), 509 states have return successors, (934), 583 states have call predecessors, (934), 556 states have call successors, (934) [2022-01-10 08:23:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5287 states to 5287 states and 7081 transitions. [2022-01-10 08:23:41,637 INFO L78 Accepts]: Start accepts. Automaton has 5287 states and 7081 transitions. Word has length 124 [2022-01-10 08:23:41,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:41,637 INFO L470 AbstractCegarLoop]: Abstraction has 5287 states and 7081 transitions. [2022-01-10 08:23:41,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 5287 states and 7081 transitions. [2022-01-10 08:23:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:41,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:41,647 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] [2022-01-10 08:23:41,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 08:23:41,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:41,854 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:41,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2023148380, now seen corresponding path program 1 times [2022-01-10 08:23:41,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:41,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711100000] [2022-01-10 08:23:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:41,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:41,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:41,856 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:41,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 08:23:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:41,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:41,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:42,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:42,119 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:42,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711100000] [2022-01-10 08:23:42,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711100000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:42,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:42,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:42,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243954416] [2022-01-10 08:23:42,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:42,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:42,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:42,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:42,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:42,122 INFO L87 Difference]: Start difference. First operand 5287 states and 7081 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:42,640 INFO L93 Difference]: Finished difference Result 6026 states and 8164 transitions. [2022-01-10 08:23:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:42,658 INFO L225 Difference]: With dead ends: 6026 [2022-01-10 08:23:42,659 INFO L226 Difference]: Without dead ends: 5409 [2022-01-10 08:23:42,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:42,662 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 758 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:42,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1037 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5409 states. [2022-01-10 08:23:42,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5409 to 5409. [2022-01-10 08:23:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5409 states, 4332 states have (on average 1.3245614035087718) internal successors, (5738), 4474 states have internal predecessors, (5738), 562 states have call successors, (562), 358 states have call predecessors, (562), 513 states have return successors, (936), 585 states have call predecessors, (936), 558 states have call successors, (936) [2022-01-10 08:23:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 7236 transitions. [2022-01-10 08:23:42,881 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 7236 transitions. Word has length 124 [2022-01-10 08:23:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:42,882 INFO L470 AbstractCegarLoop]: Abstraction has 5409 states and 7236 transitions. [2022-01-10 08:23:42,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 7236 transitions. [2022-01-10 08:23:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:42,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:42,888 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] [2022-01-10 08:23:42,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:43,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:43,096 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:43,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:43,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1776888633, now seen corresponding path program 1 times [2022-01-10 08:23:43,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:43,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366860920] [2022-01-10 08:23:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:43,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:43,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:43,098 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:43,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 08:23:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:43,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:43,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:43,326 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:43,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366860920] [2022-01-10 08:23:43,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366860920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:43,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:43,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:43,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065845276] [2022-01-10 08:23:43,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:43,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:43,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:43,328 INFO L87 Difference]: Start difference. First operand 5409 states and 7236 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:43,808 INFO L93 Difference]: Finished difference Result 6270 states and 8474 transitions. [2022-01-10 08:23:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:43,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:43,819 INFO L225 Difference]: With dead ends: 6270 [2022-01-10 08:23:43,820 INFO L226 Difference]: Without dead ends: 5531 [2022-01-10 08:23:43,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:43,823 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 752 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:43,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 1028 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5531 states. [2022-01-10 08:23:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5531 to 5531. [2022-01-10 08:23:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5531 states, 4448 states have (on average 1.32306654676259) internal successors, (5885), 4590 states have internal predecessors, (5885), 564 states have call successors, (564), 362 states have call predecessors, (564), 517 states have return successors, (938), 587 states have call predecessors, (938), 560 states have call successors, (938) [2022-01-10 08:23:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5531 states to 5531 states and 7387 transitions. [2022-01-10 08:23:44,059 INFO L78 Accepts]: Start accepts. Automaton has 5531 states and 7387 transitions. Word has length 124 [2022-01-10 08:23:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:44,060 INFO L470 AbstractCegarLoop]: Abstraction has 5531 states and 7387 transitions. [2022-01-10 08:23:44,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 5531 states and 7387 transitions. [2022-01-10 08:23:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:44,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:44,070 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] [2022-01-10 08:23:44,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:44,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:44,282 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:44,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1523387075, now seen corresponding path program 1 times [2022-01-10 08:23:44,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:44,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800723615] [2022-01-10 08:23:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:44,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:44,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:44,284 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:44,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 08:23:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:44,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:44,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:44,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:44,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:44,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800723615] [2022-01-10 08:23:44,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800723615] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:44,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:44,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:44,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059321496] [2022-01-10 08:23:44,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:44,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:44,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:44,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:44,543 INFO L87 Difference]: Start difference. First operand 5531 states and 7387 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:45,067 INFO L93 Difference]: Finished difference Result 6514 states and 8776 transitions. [2022-01-10 08:23:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:45,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:45,079 INFO L225 Difference]: With dead ends: 6514 [2022-01-10 08:23:45,079 INFO L226 Difference]: Without dead ends: 5653 [2022-01-10 08:23:45,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:45,083 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 745 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:45,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 1021 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5653 states. [2022-01-10 08:23:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5653 to 5653. [2022-01-10 08:23:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5653 states, 4564 states have (on average 1.3207712532865907) internal successors, (6028), 4706 states have internal predecessors, (6028), 566 states have call successors, (566), 366 states have call predecessors, (566), 521 states have return successors, (940), 589 states have call predecessors, (940), 562 states have call successors, (940) [2022-01-10 08:23:45,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5653 states to 5653 states and 7534 transitions. [2022-01-10 08:23:45,297 INFO L78 Accepts]: Start accepts. Automaton has 5653 states and 7534 transitions. Word has length 124 [2022-01-10 08:23:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:45,297 INFO L470 AbstractCegarLoop]: Abstraction has 5653 states and 7534 transitions. [2022-01-10 08:23:45,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:45,297 INFO L276 IsEmpty]: Start isEmpty. Operand 5653 states and 7534 transitions. [2022-01-10 08:23:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:45,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:45,303 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] [2022-01-10 08:23:45,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:45,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:45,511 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:45,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:45,512 INFO L85 PathProgramCache]: Analyzing trace with hash 417618020, now seen corresponding path program 1 times [2022-01-10 08:23:45,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:45,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223356180] [2022-01-10 08:23:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:45,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:45,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:45,513 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:45,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 08:23:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:45,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:45,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:45,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:45,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:45,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223356180] [2022-01-10 08:23:45,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223356180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:45,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:45,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:45,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797407218] [2022-01-10 08:23:45,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:45,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:45,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:45,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:45,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:45,788 INFO L87 Difference]: Start difference. First operand 5653 states and 7534 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:46,354 INFO L93 Difference]: Finished difference Result 6758 states and 9070 transitions. [2022-01-10 08:23:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:46,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:46,368 INFO L225 Difference]: With dead ends: 6758 [2022-01-10 08:23:46,368 INFO L226 Difference]: Without dead ends: 5775 [2022-01-10 08:23:46,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:46,374 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 737 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:46,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 1014 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5775 states. [2022-01-10 08:23:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5775 to 5775. [2022-01-10 08:23:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 4680 states have (on average 1.3177350427350427) internal successors, (6167), 4822 states have internal predecessors, (6167), 568 states have call successors, (568), 370 states have call predecessors, (568), 525 states have return successors, (942), 591 states have call predecessors, (942), 564 states have call successors, (942) [2022-01-10 08:23:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 7677 transitions. [2022-01-10 08:23:46,634 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 7677 transitions. Word has length 124 [2022-01-10 08:23:46,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:46,634 INFO L470 AbstractCegarLoop]: Abstraction has 5775 states and 7677 transitions. [2022-01-10 08:23:46,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:46,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 7677 transitions. [2022-01-10 08:23:46,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:46,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:46,641 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] [2022-01-10 08:23:46,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:46,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:46,848 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:46,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2023637992, now seen corresponding path program 1 times [2022-01-10 08:23:46,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:46,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309510277] [2022-01-10 08:23:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:46,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:46,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:46,856 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:46,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 08:23:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:46,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:46,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:47,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:47,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:47,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309510277] [2022-01-10 08:23:47,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309510277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:47,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:47,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:47,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666556102] [2022-01-10 08:23:47,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:47,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:47,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:47,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:47,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:47,096 INFO L87 Difference]: Start difference. First operand 5775 states and 7677 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:47,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:47,661 INFO L93 Difference]: Finished difference Result 7002 states and 9356 transitions. [2022-01-10 08:23:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:47,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:47,678 INFO L225 Difference]: With dead ends: 7002 [2022-01-10 08:23:47,679 INFO L226 Difference]: Without dead ends: 5897 [2022-01-10 08:23:47,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:47,684 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 730 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:47,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 1007 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:23:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5897 states. [2022-01-10 08:23:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5897 to 5897. [2022-01-10 08:23:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5897 states, 4796 states have (on average 1.3140116763969976) internal successors, (6302), 4938 states have internal predecessors, (6302), 570 states have call successors, (570), 374 states have call predecessors, (570), 529 states have return successors, (944), 593 states have call predecessors, (944), 566 states have call successors, (944) [2022-01-10 08:23:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5897 states to 5897 states and 7816 transitions. [2022-01-10 08:23:47,956 INFO L78 Accepts]: Start accepts. Automaton has 5897 states and 7816 transitions. Word has length 124 [2022-01-10 08:23:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:47,956 INFO L470 AbstractCegarLoop]: Abstraction has 5897 states and 7816 transitions. [2022-01-10 08:23:47,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 5897 states and 7816 transitions. [2022-01-10 08:23:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:47,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:47,964 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] [2022-01-10 08:23:47,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-01-10 08:23:48,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:48,172 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash 483655363, now seen corresponding path program 1 times [2022-01-10 08:23:48,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:48,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582676204] [2022-01-10 08:23:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:48,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:48,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:48,174 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:48,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 08:23:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:48,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:48,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:48,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:48,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:48,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582676204] [2022-01-10 08:23:48,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582676204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:48,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:48,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:48,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487487592] [2022-01-10 08:23:48,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:48,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:48,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:48,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:48,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:48,401 INFO L87 Difference]: Start difference. First operand 5897 states and 7816 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:48,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:48,969 INFO L93 Difference]: Finished difference Result 7246 states and 9634 transitions. [2022-01-10 08:23:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:48,970 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:48,980 INFO L225 Difference]: With dead ends: 7246 [2022-01-10 08:23:48,980 INFO L226 Difference]: Without dead ends: 6019 [2022-01-10 08:23:48,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:48,983 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 723 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:48,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1000 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6019 states. [2022-01-10 08:23:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6019 to 6019. [2022-01-10 08:23:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6019 states, 4912 states have (on average 1.3096498371335505) internal successors, (6433), 5054 states have internal predecessors, (6433), 572 states have call successors, (572), 378 states have call predecessors, (572), 533 states have return successors, (946), 595 states have call predecessors, (946), 568 states have call successors, (946) [2022-01-10 08:23:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6019 states to 6019 states and 7951 transitions. [2022-01-10 08:23:49,216 INFO L78 Accepts]: Start accepts. Automaton has 6019 states and 7951 transitions. Word has length 124 [2022-01-10 08:23:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:49,216 INFO L470 AbstractCegarLoop]: Abstraction has 6019 states and 7951 transitions. [2022-01-10 08:23:49,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 6019 states and 7951 transitions. [2022-01-10 08:23:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:49,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:49,221 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] [2022-01-10 08:23:49,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:49,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:49,428 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1034224825, now seen corresponding path program 1 times [2022-01-10 08:23:49,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:49,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951157913] [2022-01-10 08:23:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:49,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:49,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:49,430 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:49,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 08:23:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:49,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:49,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:49,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:49,642 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:49,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951157913] [2022-01-10 08:23:49,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951157913] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:49,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:49,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:49,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704661191] [2022-01-10 08:23:49,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:49,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:49,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:49,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:49,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:49,643 INFO L87 Difference]: Start difference. First operand 6019 states and 7951 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:49,941 INFO L93 Difference]: Finished difference Result 7577 states and 10015 transitions. [2022-01-10 08:23:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:49,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:49,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:49,955 INFO L225 Difference]: With dead ends: 7577 [2022-01-10 08:23:49,955 INFO L226 Difference]: Without dead ends: 6229 [2022-01-10 08:23:49,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:23:49,959 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 284 mSDsluCounter, 1657 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 2173 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:49,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 2173 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6229 states. [2022-01-10 08:23:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6229 to 6025. [2022-01-10 08:23:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6025 states, 4918 states have (on average 1.3064253761691744) internal successors, (6425), 5060 states have internal predecessors, (6425), 572 states have call successors, (572), 378 states have call predecessors, (572), 533 states have return successors, (946), 595 states have call predecessors, (946), 568 states have call successors, (946) [2022-01-10 08:23:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 7943 transitions. [2022-01-10 08:23:50,232 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 7943 transitions. Word has length 124 [2022-01-10 08:23:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:50,233 INFO L470 AbstractCegarLoop]: Abstraction has 6025 states and 7943 transitions. [2022-01-10 08:23:50,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 7943 transitions. [2022-01-10 08:23:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:50,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:50,238 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] [2022-01-10 08:23:50,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:50,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:50,445 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:50,446 INFO L85 PathProgramCache]: Analyzing trace with hash 532533125, now seen corresponding path program 1 times [2022-01-10 08:23:50,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:50,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137215326] [2022-01-10 08:23:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:50,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:50,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:50,447 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:50,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 08:23:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:50,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:50,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:50,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:50,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:50,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137215326] [2022-01-10 08:23:50,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137215326] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:50,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:50,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:50,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581326482] [2022-01-10 08:23:50,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:50,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:50,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:50,658 INFO L87 Difference]: Start difference. First operand 6025 states and 7943 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:50,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:50,892 INFO L93 Difference]: Finished difference Result 7561 states and 9963 transitions. [2022-01-10 08:23:50,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:50,893 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:50,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:50,909 INFO L225 Difference]: With dead ends: 7561 [2022-01-10 08:23:50,909 INFO L226 Difference]: Without dead ends: 6207 [2022-01-10 08:23:50,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:23:50,916 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 245 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:50,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 2166 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6207 states. [2022-01-10 08:23:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6207 to 6031. [2022-01-10 08:23:51,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6031 states, 4924 states have (on average 1.303208773354996) internal successors, (6417), 5066 states have internal predecessors, (6417), 572 states have call successors, (572), 378 states have call predecessors, (572), 533 states have return successors, (946), 595 states have call predecessors, (946), 568 states have call successors, (946) [2022-01-10 08:23:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 7935 transitions. [2022-01-10 08:23:51,218 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 7935 transitions. Word has length 124 [2022-01-10 08:23:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:51,218 INFO L470 AbstractCegarLoop]: Abstraction has 6031 states and 7935 transitions. [2022-01-10 08:23:51,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 7935 transitions. [2022-01-10 08:23:51,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:51,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:51,223 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] [2022-01-10 08:23:51,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:51,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:51,430 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:51,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:51,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1544803773, now seen corresponding path program 1 times [2022-01-10 08:23:51,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:51,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961269727] [2022-01-10 08:23:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:51,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:51,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:51,432 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:51,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 08:23:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:51,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:51,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:51,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:51,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:51,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961269727] [2022-01-10 08:23:51,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961269727] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:51,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:51,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:51,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844804266] [2022-01-10 08:23:51,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:51,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:51,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:51,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:51,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:51,672 INFO L87 Difference]: Start difference. First operand 6031 states and 7935 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:51,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:51,901 INFO L93 Difference]: Finished difference Result 7545 states and 9911 transitions. [2022-01-10 08:23:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:51,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:51,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:51,916 INFO L225 Difference]: With dead ends: 7545 [2022-01-10 08:23:51,916 INFO L226 Difference]: Without dead ends: 6185 [2022-01-10 08:23:51,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:23:51,922 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 206 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:51,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 2143 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:51,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6185 states. [2022-01-10 08:23:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6185 to 6037. [2022-01-10 08:23:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6037 states, 4930 states have (on average 1.3) internal successors, (6409), 5072 states have internal predecessors, (6409), 572 states have call successors, (572), 378 states have call predecessors, (572), 533 states have return successors, (946), 595 states have call predecessors, (946), 568 states have call successors, (946) [2022-01-10 08:23:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6037 states to 6037 states and 7927 transitions. [2022-01-10 08:23:52,229 INFO L78 Accepts]: Start accepts. Automaton has 6037 states and 7927 transitions. Word has length 124 [2022-01-10 08:23:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:52,229 INFO L470 AbstractCegarLoop]: Abstraction has 6037 states and 7927 transitions. [2022-01-10 08:23:52,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 6037 states and 7927 transitions. [2022-01-10 08:23:52,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:52,235 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:52,235 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] [2022-01-10 08:23:52,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:52,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:52,442 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:52,443 INFO L85 PathProgramCache]: Analyzing trace with hash 363654017, now seen corresponding path program 1 times [2022-01-10 08:23:52,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:52,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397213731] [2022-01-10 08:23:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:52,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:52,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:52,444 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:52,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 08:23:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:52,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:52,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:52,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:52,696 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:52,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397213731] [2022-01-10 08:23:52,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397213731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:52,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:52,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:52,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94115314] [2022-01-10 08:23:52,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:52,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:52,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:52,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:52,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:52,698 INFO L87 Difference]: Start difference. First operand 6037 states and 7927 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:52,934 INFO L93 Difference]: Finished difference Result 7529 states and 9859 transitions. [2022-01-10 08:23:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:52,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:52,948 INFO L225 Difference]: With dead ends: 7529 [2022-01-10 08:23:52,948 INFO L226 Difference]: Without dead ends: 6163 [2022-01-10 08:23:52,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:23:52,952 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 167 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 2128 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:52,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 2128 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6163 states. [2022-01-10 08:23:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6163 to 6043. [2022-01-10 08:23:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6043 states, 4936 states have (on average 1.2967990275526742) internal successors, (6401), 5078 states have internal predecessors, (6401), 572 states have call successors, (572), 378 states have call predecessors, (572), 533 states have return successors, (946), 595 states have call predecessors, (946), 568 states have call successors, (946) [2022-01-10 08:23:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6043 states to 6043 states and 7919 transitions. [2022-01-10 08:23:53,298 INFO L78 Accepts]: Start accepts. Automaton has 6043 states and 7919 transitions. Word has length 124 [2022-01-10 08:23:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:53,299 INFO L470 AbstractCegarLoop]: Abstraction has 6043 states and 7919 transitions. [2022-01-10 08:23:53,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:53,299 INFO L276 IsEmpty]: Start isEmpty. Operand 6043 states and 7919 transitions. [2022-01-10 08:23:53,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:53,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:53,303 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] [2022-01-10 08:23:53,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-01-10 08:23:53,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:53,510 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash 309261119, now seen corresponding path program 1 times [2022-01-10 08:23:53,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:53,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521409102] [2022-01-10 08:23:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:53,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:53,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:53,513 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:53,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 08:23:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:53,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:53,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:53,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:53,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:53,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521409102] [2022-01-10 08:23:53,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521409102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:53,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:53,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:23:53,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331981453] [2022-01-10 08:23:53,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:53,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:53,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:53,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:53,766 INFO L87 Difference]: Start difference. First operand 6043 states and 7919 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:54,055 INFO L93 Difference]: Finished difference Result 8640 states and 11207 transitions. [2022-01-10 08:23:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:54,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:54,068 INFO L225 Difference]: With dead ends: 8640 [2022-01-10 08:23:54,069 INFO L226 Difference]: Without dead ends: 7268 [2022-01-10 08:23:54,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:54,072 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 444 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:54,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 902 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7268 states. [2022-01-10 08:23:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7268 to 7260. [2022-01-10 08:23:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7260 states, 6073 states have (on average 1.2881607113452989) internal successors, (7823), 6216 states have internal predecessors, (7823), 615 states have call successors, (615), 414 states have call predecessors, (615), 570 states have return successors, (990), 638 states have call predecessors, (990), 611 states have call successors, (990) [2022-01-10 08:23:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7260 states to 7260 states and 9428 transitions. [2022-01-10 08:23:54,423 INFO L78 Accepts]: Start accepts. Automaton has 7260 states and 9428 transitions. Word has length 124 [2022-01-10 08:23:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:54,423 INFO L470 AbstractCegarLoop]: Abstraction has 7260 states and 9428 transitions. [2022-01-10 08:23:54,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:54,423 INFO L276 IsEmpty]: Start isEmpty. Operand 7260 states and 9428 transitions. [2022-01-10 08:23:54,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:54,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:54,429 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] [2022-01-10 08:23:54,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-01-10 08:23:54,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:54,629 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:54,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:54,630 INFO L85 PathProgramCache]: Analyzing trace with hash 2128987038, now seen corresponding path program 1 times [2022-01-10 08:23:54,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:54,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319268455] [2022-01-10 08:23:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:54,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:54,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:54,631 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:54,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 08:23:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:54,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:54,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:54,851 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:54,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319268455] [2022-01-10 08:23:54,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319268455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:54,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:54,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:54,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765417374] [2022-01-10 08:23:54,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:54,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:54,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:54,852 INFO L87 Difference]: Start difference. First operand 7260 states and 9428 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:55,223 INFO L93 Difference]: Finished difference Result 10633 states and 13738 transitions. [2022-01-10 08:23:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:55,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:55,237 INFO L225 Difference]: With dead ends: 10633 [2022-01-10 08:23:55,238 INFO L226 Difference]: Without dead ends: 8044 [2022-01-10 08:23:55,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:23:55,245 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 129 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:55,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 2141 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8044 states. [2022-01-10 08:23:55,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8044 to 7308. [2022-01-10 08:23:55,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7308 states, 6121 states have (on average 1.2836137885966346) internal successors, (7857), 6264 states have internal predecessors, (7857), 615 states have call successors, (615), 414 states have call predecessors, (615), 570 states have return successors, (990), 638 states have call predecessors, (990), 611 states have call successors, (990) [2022-01-10 08:23:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7308 states to 7308 states and 9462 transitions. [2022-01-10 08:23:55,567 INFO L78 Accepts]: Start accepts. Automaton has 7308 states and 9462 transitions. Word has length 124 [2022-01-10 08:23:55,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:55,568 INFO L470 AbstractCegarLoop]: Abstraction has 7308 states and 9462 transitions. [2022-01-10 08:23:55,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:55,568 INFO L276 IsEmpty]: Start isEmpty. Operand 7308 states and 9462 transitions. [2022-01-10 08:23:55,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:55,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:55,574 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] [2022-01-10 08:23:55,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:55,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:55,781 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:55,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1732251172, now seen corresponding path program 1 times [2022-01-10 08:23:55,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:55,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072093623] [2022-01-10 08:23:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:55,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:55,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:55,794 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:55,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 08:23:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:55,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:55,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:56,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:56,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:56,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072093623] [2022-01-10 08:23:56,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072093623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:56,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:56,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:56,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423915473] [2022-01-10 08:23:56,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:56,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:56,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:56,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:56,011 INFO L87 Difference]: Start difference. First operand 7308 states and 9462 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:56,341 INFO L93 Difference]: Finished difference Result 10029 states and 12900 transitions. [2022-01-10 08:23:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:56,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:56,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:56,360 INFO L225 Difference]: With dead ends: 10029 [2022-01-10 08:23:56,360 INFO L226 Difference]: Without dead ends: 7392 [2022-01-10 08:23:56,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:23:56,365 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 49 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:56,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 2078 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7392 states. [2022-01-10 08:23:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7392 to 7320. [2022-01-10 08:23:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7320 states, 6133 states have (on average 1.2788195010598402) internal successors, (7843), 6276 states have internal predecessors, (7843), 615 states have call successors, (615), 414 states have call predecessors, (615), 570 states have return successors, (990), 638 states have call predecessors, (990), 611 states have call successors, (990) [2022-01-10 08:23:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7320 states to 7320 states and 9448 transitions. [2022-01-10 08:23:56,688 INFO L78 Accepts]: Start accepts. Automaton has 7320 states and 9448 transitions. Word has length 124 [2022-01-10 08:23:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:56,688 INFO L470 AbstractCegarLoop]: Abstraction has 7320 states and 9448 transitions. [2022-01-10 08:23:56,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 7320 states and 9448 transitions. [2022-01-10 08:23:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:56,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:56,693 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] [2022-01-10 08:23:56,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-01-10 08:23:56,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:56,894 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash 196021530, now seen corresponding path program 1 times [2022-01-10 08:23:56,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:56,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315918485] [2022-01-10 08:23:56,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:56,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:56,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:56,896 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:56,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 08:23:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:56,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:56,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:57,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:57,112 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:57,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315918485] [2022-01-10 08:23:57,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315918485] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:57,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:57,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:57,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660117897] [2022-01-10 08:23:57,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:57,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:57,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:57,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:57,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:57,113 INFO L87 Difference]: Start difference. First operand 7320 states and 9448 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:57,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:57,517 INFO L93 Difference]: Finished difference Result 9997 states and 12800 transitions. [2022-01-10 08:23:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:57,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:57,530 INFO L225 Difference]: With dead ends: 9997 [2022-01-10 08:23:57,530 INFO L226 Difference]: Without dead ends: 7348 [2022-01-10 08:23:57,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:23:57,535 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 10 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:57,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 2063 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7348 states. [2022-01-10 08:23:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7348 to 7332. [2022-01-10 08:23:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7332 states, 6145 states have (on average 1.2740439381611066) internal successors, (7829), 6288 states have internal predecessors, (7829), 615 states have call successors, (615), 414 states have call predecessors, (615), 570 states have return successors, (990), 638 states have call predecessors, (990), 611 states have call successors, (990) [2022-01-10 08:23:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7332 states to 7332 states and 9434 transitions. [2022-01-10 08:23:57,866 INFO L78 Accepts]: Start accepts. Automaton has 7332 states and 9434 transitions. Word has length 124 [2022-01-10 08:23:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:57,866 INFO L470 AbstractCegarLoop]: Abstraction has 7332 states and 9434 transitions. [2022-01-10 08:23:57,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:57,867 INFO L276 IsEmpty]: Start isEmpty. Operand 7332 states and 9434 transitions. [2022-01-10 08:23:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:57,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:57,871 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] [2022-01-10 08:23:57,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-01-10 08:23:58,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:58,076 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:58,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:58,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1175785768, now seen corresponding path program 1 times [2022-01-10 08:23:58,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:58,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251892124] [2022-01-10 08:23:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:58,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:58,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:58,077 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:58,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 08:23:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:58,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:23:58,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:58,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:58,333 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:58,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251892124] [2022-01-10 08:23:58,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251892124] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:58,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:58,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:58,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233093765] [2022-01-10 08:23:58,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:58,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:58,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:58,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:58,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:58,334 INFO L87 Difference]: Start difference. First operand 7332 states and 9434 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:58,949 INFO L93 Difference]: Finished difference Result 9994 states and 12687 transitions. [2022-01-10 08:23:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:23:58,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:23:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:58,962 INFO L225 Difference]: With dead ends: 9994 [2022-01-10 08:23:58,962 INFO L226 Difference]: Without dead ends: 7332 [2022-01-10 08:23:58,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:58,967 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 591 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:58,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 995 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:58,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2022-01-10 08:23:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 7332. [2022-01-10 08:23:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7332 states, 6145 states have (on average 1.2717656631407648) internal successors, (7815), 6288 states have internal predecessors, (7815), 615 states have call successors, (615), 414 states have call predecessors, (615), 570 states have return successors, (990), 638 states have call predecessors, (990), 611 states have call successors, (990) [2022-01-10 08:23:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7332 states to 7332 states and 9420 transitions. [2022-01-10 08:23:59,311 INFO L78 Accepts]: Start accepts. Automaton has 7332 states and 9420 transitions. Word has length 124 [2022-01-10 08:23:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:59,312 INFO L470 AbstractCegarLoop]: Abstraction has 7332 states and 9420 transitions. [2022-01-10 08:23:59,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 7332 states and 9420 transitions. [2022-01-10 08:23:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:23:59,317 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:59,317 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] [2022-01-10 08:23:59,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-01-10 08:23:59,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:23:59,517 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash -901026154, now seen corresponding path program 1 times [2022-01-10 08:23:59,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:59,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833046074] [2022-01-10 08:23:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:59,518 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:59,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:59,519 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:23:59,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 08:23:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:59,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:23:59,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:23:59,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:59,796 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:59,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833046074] [2022-01-10 08:23:59,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833046074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:59,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:59,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:59,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703186289] [2022-01-10 08:23:59,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:59,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:59,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:59,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:59,797 INFO L87 Difference]: Start difference. First operand 7332 states and 9420 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:00,488 INFO L93 Difference]: Finished difference Result 10232 states and 12954 transitions. [2022-01-10 08:24:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:00,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 08:24:00,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:00,503 INFO L225 Difference]: With dead ends: 10232 [2022-01-10 08:24:00,503 INFO L226 Difference]: Without dead ends: 7570 [2022-01-10 08:24:00,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:00,510 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 671 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:00,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 1017 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7570 states. [2022-01-10 08:24:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7570 to 7520. [2022-01-10 08:24:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7520 states, 6329 states have (on average 1.2626007268130826) internal successors, (7991), 6472 states have internal predecessors, (7991), 615 states have call successors, (615), 418 states have call predecessors, (615), 574 states have return successors, (990), 638 states have call predecessors, (990), 611 states have call successors, (990) [2022-01-10 08:24:00,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7520 states to 7520 states and 9596 transitions. [2022-01-10 08:24:00,936 INFO L78 Accepts]: Start accepts. Automaton has 7520 states and 9596 transitions. Word has length 124 [2022-01-10 08:24:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:00,937 INFO L470 AbstractCegarLoop]: Abstraction has 7520 states and 9596 transitions. [2022-01-10 08:24:00,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 7520 states and 9596 transitions. [2022-01-10 08:24:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 08:24:00,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:00,941 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] [2022-01-10 08:24:00,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 08:24:01,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:01,142 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:01,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:01,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1035039660, now seen corresponding path program 1 times [2022-01-10 08:24:01,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:01,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426952444] [2022-01-10 08:24:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:01,143 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:01,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:01,144 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:01,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 08:24:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:01,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:01,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:01,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:01,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:01,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426952444] [2022-01-10 08:24:01,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426952444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:01,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:01,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:24:01,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710693569] [2022-01-10 08:24:01,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:01,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:01,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:01,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:01,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:01,392 INFO L87 Difference]: Start difference. First operand 7520 states and 9596 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:24:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:01,878 INFO L93 Difference]: Finished difference Result 13135 states and 16346 transitions. [2022-01-10 08:24:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:01,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 124 [2022-01-10 08:24:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:01,900 INFO L225 Difference]: With dead ends: 13135 [2022-01-10 08:24:01,901 INFO L226 Difference]: Without dead ends: 10286 [2022-01-10 08:24:01,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:01,911 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 370 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:01,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 849 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:01,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2022-01-10 08:24:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 10282. [2022-01-10 08:24:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10282 states, 8919 states have (on average 1.2388160107635384) internal successors, (11049), 9068 states have internal predecessors, (11049), 705 states have call successors, (705), 498 states have call predecessors, (705), 656 states have return successors, (1082), 724 states have call predecessors, (1082), 701 states have call successors, (1082) [2022-01-10 08:24:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10282 states to 10282 states and 12836 transitions. [2022-01-10 08:24:02,463 INFO L78 Accepts]: Start accepts. Automaton has 10282 states and 12836 transitions. Word has length 124 [2022-01-10 08:24:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:02,463 INFO L470 AbstractCegarLoop]: Abstraction has 10282 states and 12836 transitions. [2022-01-10 08:24:02,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:24:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 10282 states and 12836 transitions. [2022-01-10 08:24:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 08:24:02,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:02,471 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:02,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-01-10 08:24:02,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:02,675 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1543650176, now seen corresponding path program 1 times [2022-01-10 08:24:02,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:02,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407568000] [2022-01-10 08:24:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:02,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:02,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:02,677 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:02,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 08:24:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:02,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:24:02,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 08:24:02,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:02,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:02,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407568000] [2022-01-10 08:24:02,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407568000] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:02,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:02,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:24:02,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065328230] [2022-01-10 08:24:02,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:02,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:24:02,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:02,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:24:02,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:02,924 INFO L87 Difference]: Start difference. First operand 10282 states and 12836 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 08:24:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:03,529 INFO L93 Difference]: Finished difference Result 14952 states and 19116 transitions. [2022-01-10 08:24:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:24:03,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 155 [2022-01-10 08:24:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:03,548 INFO L225 Difference]: With dead ends: 14952 [2022-01-10 08:24:03,548 INFO L226 Difference]: Without dead ends: 10348 [2022-01-10 08:24:03,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:24:03,556 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 37 mSDsluCounter, 2043 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2556 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:03,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2556 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10348 states. [2022-01-10 08:24:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10348 to 9802. [2022-01-10 08:24:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9802 states, 8607 states have (on average 1.2319042639711864) internal successors, (10603), 8695 states have internal predecessors, (10603), 609 states have call successors, (609), 447 states have call predecessors, (609), 584 states have return successors, (939), 668 states have call predecessors, (939), 605 states have call successors, (939) [2022-01-10 08:24:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9802 states to 9802 states and 12151 transitions. [2022-01-10 08:24:04,066 INFO L78 Accepts]: Start accepts. Automaton has 9802 states and 12151 transitions. Word has length 155 [2022-01-10 08:24:04,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:04,066 INFO L470 AbstractCegarLoop]: Abstraction has 9802 states and 12151 transitions. [2022-01-10 08:24:04,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 08:24:04,066 INFO L276 IsEmpty]: Start isEmpty. Operand 9802 states and 12151 transitions. [2022-01-10 08:24:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 08:24:04,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:04,073 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:04,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:04,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:04,281 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:04,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:04,281 INFO L85 PathProgramCache]: Analyzing trace with hash -913273158, now seen corresponding path program 1 times [2022-01-10 08:24:04,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:04,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865895445] [2022-01-10 08:24:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:04,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:04,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:04,282 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:04,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 08:24:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:04,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:04,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-10 08:24:04,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:04,511 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:04,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865895445] [2022-01-10 08:24:04,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865895445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:04,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:04,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:04,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520953472] [2022-01-10 08:24:04,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:04,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:04,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:04,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:04,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:04,512 INFO L87 Difference]: Start difference. First operand 9802 states and 12151 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:24:04,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:04,949 INFO L93 Difference]: Finished difference Result 12268 states and 15381 transitions. [2022-01-10 08:24:04,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:04,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 156 [2022-01-10 08:24:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:04,964 INFO L225 Difference]: With dead ends: 12268 [2022-01-10 08:24:04,964 INFO L226 Difference]: Without dead ends: 8188 [2022-01-10 08:24:04,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:04,971 INFO L933 BasicCegarLoop]: 511 mSDtfsCounter, 148 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:04,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 867 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:04,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8188 states. [2022-01-10 08:24:05,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8188 to 8188. [2022-01-10 08:24:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8188 states, 7319 states have (on average 1.2217516054105753) internal successors, (8942), 7381 states have internal predecessors, (8942), 433 states have call successors, (433), 335 states have call predecessors, (433), 434 states have return successors, (635), 472 states have call predecessors, (635), 429 states have call successors, (635) [2022-01-10 08:24:05,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8188 states to 8188 states and 10010 transitions. [2022-01-10 08:24:05,400 INFO L78 Accepts]: Start accepts. Automaton has 8188 states and 10010 transitions. Word has length 156 [2022-01-10 08:24:05,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:05,400 INFO L470 AbstractCegarLoop]: Abstraction has 8188 states and 10010 transitions. [2022-01-10 08:24:05,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:24:05,400 INFO L276 IsEmpty]: Start isEmpty. Operand 8188 states and 10010 transitions. [2022-01-10 08:24:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 08:24:05,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:05,404 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:05,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-01-10 08:24:05,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:05,605 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:05,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:05,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1207337929, now seen corresponding path program 1 times [2022-01-10 08:24:05,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:05,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122782598] [2022-01-10 08:24:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:05,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:05,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:05,606 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:05,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 08:24:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:05,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:05,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 08:24:05,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:05,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:05,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122782598] [2022-01-10 08:24:05,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122782598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:05,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:05,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:05,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662880841] [2022-01-10 08:24:05,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:05,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:05,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:05,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:05,883 INFO L87 Difference]: Start difference. First operand 8188 states and 10010 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:24:06,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:06,429 INFO L93 Difference]: Finished difference Result 12154 states and 15347 transitions. [2022-01-10 08:24:06,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:06,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 159 [2022-01-10 08:24:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:06,446 INFO L225 Difference]: With dead ends: 12154 [2022-01-10 08:24:06,446 INFO L226 Difference]: Without dead ends: 9912 [2022-01-10 08:24:06,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:06,451 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 68 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:06,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1029 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:06,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9912 states. [2022-01-10 08:24:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9912 to 9884. [2022-01-10 08:24:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9884 states, 8689 states have (on average 1.2347796063988952) internal successors, (10729), 8787 states have internal predecessors, (10729), 589 states have call successors, (589), 443 states have call predecessors, (589), 604 states have return successors, (932), 654 states have call predecessors, (932), 585 states have call successors, (932) [2022-01-10 08:24:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 12250 transitions. [2022-01-10 08:24:07,000 INFO L78 Accepts]: Start accepts. Automaton has 9884 states and 12250 transitions. Word has length 159 [2022-01-10 08:24:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:07,000 INFO L470 AbstractCegarLoop]: Abstraction has 9884 states and 12250 transitions. [2022-01-10 08:24:07,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:24:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 9884 states and 12250 transitions. [2022-01-10 08:24:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 08:24:07,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:07,004 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:07,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-01-10 08:24:07,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:07,209 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:07,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:07,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1162045344, now seen corresponding path program 1 times [2022-01-10 08:24:07,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:07,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669347697] [2022-01-10 08:24:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:07,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:07,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:07,211 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:07,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 08:24:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:07,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:07,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 08:24:07,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:07,466 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:07,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669347697] [2022-01-10 08:24:07,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669347697] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:07,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:07,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:07,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718310824] [2022-01-10 08:24:07,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:07,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:07,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:07,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:07,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:07,467 INFO L87 Difference]: Start difference. First operand 9884 states and 12250 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:24:08,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:08,084 INFO L93 Difference]: Finished difference Result 17332 states and 22543 transitions. [2022-01-10 08:24:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:08,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 160 [2022-01-10 08:24:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:08,114 INFO L225 Difference]: With dead ends: 17332 [2022-01-10 08:24:08,114 INFO L226 Difference]: Without dead ends: 13394 [2022-01-10 08:24:08,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:08,127 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 102 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:08,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1079 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13394 states. [2022-01-10 08:24:08,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13394 to 13318. [2022-01-10 08:24:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13318 states, 11447 states have (on average 1.241111208176815) internal successors, (14207), 11599 states have internal predecessors, (14207), 925 states have call successors, (925), 677 states have call predecessors, (925), 944 states have return successors, (1702), 1042 states have call predecessors, (1702), 921 states have call successors, (1702) [2022-01-10 08:24:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13318 states to 13318 states and 16834 transitions. [2022-01-10 08:24:08,877 INFO L78 Accepts]: Start accepts. Automaton has 13318 states and 16834 transitions. Word has length 160 [2022-01-10 08:24:08,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:08,877 INFO L470 AbstractCegarLoop]: Abstraction has 13318 states and 16834 transitions. [2022-01-10 08:24:08,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:24:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 13318 states and 16834 transitions. [2022-01-10 08:24:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 08:24:08,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:08,885 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:08,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:09,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:09,086 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:09,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:09,086 INFO L85 PathProgramCache]: Analyzing trace with hash 486114087, now seen corresponding path program 1 times [2022-01-10 08:24:09,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:09,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365982562] [2022-01-10 08:24:09,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:09,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:09,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:09,087 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:09,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 08:24:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:09,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:09,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 08:24:09,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:09,362 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:09,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365982562] [2022-01-10 08:24:09,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365982562] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:09,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:09,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:09,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630694796] [2022-01-10 08:24:09,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:09,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:09,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:09,363 INFO L87 Difference]: Start difference. First operand 13318 states and 16834 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 08:24:10,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:10,392 INFO L93 Difference]: Finished difference Result 28062 states and 36736 transitions. [2022-01-10 08:24:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:10,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 161 [2022-01-10 08:24:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:10,429 INFO L225 Difference]: With dead ends: 28062 [2022-01-10 08:24:10,429 INFO L226 Difference]: Without dead ends: 20690 [2022-01-10 08:24:10,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:10,439 INFO L933 BasicCegarLoop]: 542 mSDtfsCounter, 72 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:10,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1034 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20690 states. [2022-01-10 08:24:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20690 to 20686. [2022-01-10 08:24:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20686 states, 17364 states have (on average 1.2488481916609075) internal successors, (21685), 17651 states have internal predecessors, (21685), 1633 states have call successors, (1633), 1163 states have call predecessors, (1633), 1687 states have return successors, (3179), 1872 states have call predecessors, (3179), 1629 states have call successors, (3179) [2022-01-10 08:24:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20686 states to 20686 states and 26497 transitions. [2022-01-10 08:24:11,637 INFO L78 Accepts]: Start accepts. Automaton has 20686 states and 26497 transitions. Word has length 161 [2022-01-10 08:24:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:11,637 INFO L470 AbstractCegarLoop]: Abstraction has 20686 states and 26497 transitions. [2022-01-10 08:24:11,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 08:24:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 20686 states and 26497 transitions. [2022-01-10 08:24:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-10 08:24:11,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:11,650 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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] [2022-01-10 08:24:11,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:11,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:11,851 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2022263130, now seen corresponding path program 1 times [2022-01-10 08:24:11,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:11,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980170444] [2022-01-10 08:24:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:11,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:11,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:11,853 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:11,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 08:24:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:11,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:11,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:12,110 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 08:24:12,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:12,110 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:12,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980170444] [2022-01-10 08:24:12,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980170444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:12,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:12,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:12,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874304890] [2022-01-10 08:24:12,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:12,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:12,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:12,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:12,112 INFO L87 Difference]: Start difference. First operand 20686 states and 26497 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:24:13,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:13,117 INFO L93 Difference]: Finished difference Result 30422 states and 39921 transitions. [2022-01-10 08:24:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:13,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 162 [2022-01-10 08:24:13,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:13,129 INFO L225 Difference]: With dead ends: 30422 [2022-01-10 08:24:13,129 INFO L226 Difference]: Without dead ends: 5628 [2022-01-10 08:24:13,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:13,154 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 88 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:13,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1080 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5628 states. [2022-01-10 08:24:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5628 to 5628. [2022-01-10 08:24:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5628 states, 5277 states have (on average 1.1927231381466743) internal successors, (6294), 5287 states have internal predecessors, (6294), 186 states have call successors, (186), 161 states have call predecessors, (186), 164 states have return successors, (188), 180 states have call predecessors, (188), 184 states have call successors, (188) [2022-01-10 08:24:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5628 states to 5628 states and 6668 transitions. [2022-01-10 08:24:13,457 INFO L78 Accepts]: Start accepts. Automaton has 5628 states and 6668 transitions. Word has length 162 [2022-01-10 08:24:13,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:13,457 INFO L470 AbstractCegarLoop]: Abstraction has 5628 states and 6668 transitions. [2022-01-10 08:24:13,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:24:13,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5628 states and 6668 transitions. [2022-01-10 08:24:13,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 08:24:13,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:13,460 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:13,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:13,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:13,661 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:13,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:13,661 INFO L85 PathProgramCache]: Analyzing trace with hash 129473797, now seen corresponding path program 1 times [2022-01-10 08:24:13,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:13,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581350136] [2022-01-10 08:24:13,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:13,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:13,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:13,663 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:13,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 08:24:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:13,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:13,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 08:24:14,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:14,034 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:14,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581350136] [2022-01-10 08:24:14,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581350136] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:14,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:14,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:24:14,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695341326] [2022-01-10 08:24:14,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:14,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:14,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:14,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:14,038 INFO L87 Difference]: Start difference. First operand 5628 states and 6668 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:24:14,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:14,637 INFO L93 Difference]: Finished difference Result 16221 states and 19333 transitions. [2022-01-10 08:24:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:14,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 201 [2022-01-10 08:24:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:14,654 INFO L225 Difference]: With dead ends: 16221 [2022-01-10 08:24:14,654 INFO L226 Difference]: Without dead ends: 10610 [2022-01-10 08:24:14,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:14,663 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 218 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:14,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 692 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10610 states. [2022-01-10 08:24:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10610 to 10590. [2022-01-10 08:24:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10590 states, 9927 states have (on average 1.1868641079883147) internal successors, (11782), 9945 states have internal predecessors, (11782), 350 states have call successors, (350), 305 states have call predecessors, (350), 312 states have return successors, (356), 340 states have call predecessors, (356), 348 states have call successors, (356) [2022-01-10 08:24:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10590 states to 10590 states and 12488 transitions. [2022-01-10 08:24:15,249 INFO L78 Accepts]: Start accepts. Automaton has 10590 states and 12488 transitions. Word has length 201 [2022-01-10 08:24:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:15,249 INFO L470 AbstractCegarLoop]: Abstraction has 10590 states and 12488 transitions. [2022-01-10 08:24:15,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 2 states have internal predecessors, (177), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:24:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 10590 states and 12488 transitions. [2022-01-10 08:24:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 08:24:15,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:15,253 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1] [2022-01-10 08:24:15,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-01-10 08:24:15,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:15,453 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:15,453 INFO L85 PathProgramCache]: Analyzing trace with hash 304262818, now seen corresponding path program 1 times [2022-01-10 08:24:15,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:15,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11630889] [2022-01-10 08:24:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:15,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:15,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:15,455 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:15,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 08:24:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:15,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:24:15,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:24:15,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:15,867 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:15,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11630889] [2022-01-10 08:24:15,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11630889] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:15,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:15,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:15,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030855617] [2022-01-10 08:24:15,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:15,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:24:15,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:15,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:24:15,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:24:15,869 INFO L87 Difference]: Start difference. First operand 10590 states and 12488 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:24:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:17,254 INFO L93 Difference]: Finished difference Result 31420 states and 37041 transitions. [2022-01-10 08:24:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:17,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 201 [2022-01-10 08:24:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:17,293 INFO L225 Difference]: With dead ends: 31420 [2022-01-10 08:24:17,293 INFO L226 Difference]: Without dead ends: 20848 [2022-01-10 08:24:17,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:17,304 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 439 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:17,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 1120 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:24:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20848 states. [2022-01-10 08:24:18,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20848 to 20844. [2022-01-10 08:24:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20844 states, 19538 states have (on average 1.1802129184153956) internal successors, (23059), 19581 states have internal predecessors, (23059), 681 states have call successors, (681), 593 states have call predecessors, (681), 624 states have return successors, (759), 671 states have call predecessors, (759), 679 states have call successors, (759) [2022-01-10 08:24:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20844 states to 20844 states and 24499 transitions. [2022-01-10 08:24:18,578 INFO L78 Accepts]: Start accepts. Automaton has 20844 states and 24499 transitions. Word has length 201 [2022-01-10 08:24:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:18,579 INFO L470 AbstractCegarLoop]: Abstraction has 20844 states and 24499 transitions. [2022-01-10 08:24:18,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:24:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 20844 states and 24499 transitions. [2022-01-10 08:24:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 08:24:18,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:18,585 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1] [2022-01-10 08:24:18,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:18,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:18,786 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:18,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:18,786 INFO L85 PathProgramCache]: Analyzing trace with hash 791336544, now seen corresponding path program 1 times [2022-01-10 08:24:18,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:18,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142376279] [2022-01-10 08:24:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:18,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:18,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:18,788 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:18,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-01-10 08:24:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:18,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:18,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 08:24:19,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:19,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:19,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142376279] [2022-01-10 08:24:19,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142376279] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:19,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:19,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:19,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990273287] [2022-01-10 08:24:19,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:19,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:19,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:19,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:19,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:19,096 INFO L87 Difference]: Start difference. First operand 20844 states and 24499 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:24:20,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:20,179 INFO L93 Difference]: Finished difference Result 36714 states and 43130 transitions. [2022-01-10 08:24:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:20,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 201 [2022-01-10 08:24:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:20,208 INFO L225 Difference]: With dead ends: 36714 [2022-01-10 08:24:20,208 INFO L226 Difference]: Without dead ends: 15888 [2022-01-10 08:24:20,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:20,229 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 347 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:20,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 356 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15888 states. [2022-01-10 08:24:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15888 to 15888. [2022-01-10 08:24:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15888 states, 14897 states have (on average 1.180170504128348) internal successors, (17581), 14931 states have internal predecessors, (17581), 514 states have call successors, (514), 449 states have call predecessors, (514), 476 states have return successors, (564), 508 states have call predecessors, (564), 512 states have call successors, (564) [2022-01-10 08:24:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15888 states to 15888 states and 18659 transitions. [2022-01-10 08:24:21,281 INFO L78 Accepts]: Start accepts. Automaton has 15888 states and 18659 transitions. Word has length 201 [2022-01-10 08:24:21,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:21,281 INFO L470 AbstractCegarLoop]: Abstraction has 15888 states and 18659 transitions. [2022-01-10 08:24:21,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:24:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 15888 states and 18659 transitions. [2022-01-10 08:24:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-10 08:24:21,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:21,286 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1] [2022-01-10 08:24:21,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-01-10 08:24:21,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:21,494 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:21,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1787719576, now seen corresponding path program 1 times [2022-01-10 08:24:21,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:21,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336767440] [2022-01-10 08:24:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:21,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:21,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:21,495 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:21,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-01-10 08:24:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:21,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:24:21,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:24:21,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:21,919 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:21,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336767440] [2022-01-10 08:24:21,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336767440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:21,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:21,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:21,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919094036] [2022-01-10 08:24:21,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:21,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:24:21,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:21,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:24:21,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:24:21,921 INFO L87 Difference]: Start difference. First operand 15888 states and 18659 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:24:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:23,920 INFO L93 Difference]: Finished difference Result 46185 states and 54234 transitions. [2022-01-10 08:24:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:23,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 202 [2022-01-10 08:24:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:23,988 INFO L225 Difference]: With dead ends: 46185 [2022-01-10 08:24:23,988 INFO L226 Difference]: Without dead ends: 30315 [2022-01-10 08:24:24,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:24,014 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 430 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:24,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 1095 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:24:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30315 states. [2022-01-10 08:24:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30315 to 30311. [2022-01-10 08:24:26,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30311 states, 28413 states have (on average 1.1772076162320064) internal successors, (33448), 28488 states have internal predecessors, (33448), 977 states have call successors, (977), 849 states have call predecessors, (977), 920 states have return successors, (1119), 975 states have call predecessors, (1119), 975 states have call successors, (1119) [2022-01-10 08:24:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30311 states to 30311 states and 35544 transitions. [2022-01-10 08:24:26,221 INFO L78 Accepts]: Start accepts. Automaton has 30311 states and 35544 transitions. Word has length 202 [2022-01-10 08:24:26,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:26,222 INFO L470 AbstractCegarLoop]: Abstraction has 30311 states and 35544 transitions. [2022-01-10 08:24:26,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:24:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 30311 states and 35544 transitions. [2022-01-10 08:24:26,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-10 08:24:26,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:26,232 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1] [2022-01-10 08:24:26,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:26,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:26,432 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:26,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1300645850, now seen corresponding path program 1 times [2022-01-10 08:24:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984984234] [2022-01-10 08:24:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:26,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:26,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:26,435 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:26,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-01-10 08:24:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:26,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:26,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 08:24:26,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:26,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:26,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984984234] [2022-01-10 08:24:26,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984984234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:26,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:26,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:26,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060366082] [2022-01-10 08:24:26,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:26,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:26,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:26,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:26,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:26,774 INFO L87 Difference]: Start difference. First operand 30311 states and 35544 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:24:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:28,687 INFO L93 Difference]: Finished difference Result 60595 states and 71043 transitions. [2022-01-10 08:24:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:28,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 202 [2022-01-10 08:24:28,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:28,831 INFO L225 Difference]: With dead ends: 60595 [2022-01-10 08:24:28,831 INFO L226 Difference]: Without dead ends: 30302 [2022-01-10 08:24:28,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:28,856 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 345 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:28,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 355 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30302 states. [2022-01-10 08:24:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30302 to 30302. [2022-01-10 08:24:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30302 states, 28407 states have (on average 1.1770338296898653) internal successors, (33436), 28481 states have internal predecessors, (33436), 974 states have call successors, (974), 849 states have call predecessors, (974), 920 states have return successors, (1116), 972 states have call predecessors, (1116), 972 states have call successors, (1116) [2022-01-10 08:24:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30302 states to 30302 states and 35526 transitions. [2022-01-10 08:24:30,948 INFO L78 Accepts]: Start accepts. Automaton has 30302 states and 35526 transitions. Word has length 202 [2022-01-10 08:24:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:30,949 INFO L470 AbstractCegarLoop]: Abstraction has 30302 states and 35526 transitions. [2022-01-10 08:24:30,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:24:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 30302 states and 35526 transitions. [2022-01-10 08:24:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-10 08:24:30,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:30,959 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1] [2022-01-10 08:24:30,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-01-10 08:24:31,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:24:31,160 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1476664678, now seen corresponding path program 1 times [2022-01-10 08:24:31,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:31,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911942567] [2022-01-10 08:24:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:31,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:31,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:31,162 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:24:31,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-01-10 08:24:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:31,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:24:31,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:24:31,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:31,538 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:31,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911942567] [2022-01-10 08:24:31,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911942567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:31,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:31,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:31,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615559585] [2022-01-10 08:24:31,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:31,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:24:31,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:31,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:24:31,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:24:31,539 INFO L87 Difference]: Start difference. First operand 30302 states and 35526 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)