/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_2.cil-1+token_ring.03.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:20:26,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:20:26,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:20:26,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:20:26,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:20:26,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:20:26,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:20:26,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:20:26,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:20:26,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:20:26,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:20:26,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:20:26,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:20:26,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:20:26,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:20:26,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:20:26,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:20:26,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:20:26,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:20:26,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:20:26,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:20:26,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:20:26,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:20:26,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:20:26,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 08:20:26,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 08:20:26,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 08:20:26,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 08:20:26,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 08:20:26,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 08:20:26,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 08:20:26,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 08:20:26,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 08:20:26,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 08:20:26,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 08:20:26,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 08:20:26,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 08:20:26,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 08:20:26,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:20:26,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:20:26,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:20:26,258 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 08:20:26,282 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:20:26,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:20:26,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:20:26,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:20:26,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:20:26,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:20:26,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:20:26,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:20:26,284 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:20:26,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:20:26,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:20:26,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:20:26,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:20:26,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:20:26,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:20:26,284 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:20:26,284 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:20:26,285 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:20:26,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:20:26,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:20:26,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:20:26,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:20:26,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:20:26,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:20:26,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:20:26,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:20:26,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:20:26,285 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:20:26,286 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:20:26,286 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:20:26,286 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:20:26,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:20:26,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:20:26,286 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:20:26,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:20:26,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:20:26,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:20:26,478 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:20:26,479 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:20:26,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-01-10 08:20:26,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f35af02f1/dfedefd84062465eac43aead7a5e7fdf/FLAGf27922968 [2022-01-10 08:20:26,874 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:20:26,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-01-10 08:20:26,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f35af02f1/dfedefd84062465eac43aead7a5e7fdf/FLAGf27922968 [2022-01-10 08:20:27,302 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f35af02f1/dfedefd84062465eac43aead7a5e7fdf [2022-01-10 08:20:27,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:20:27,304 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:20:27,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:20:27,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:20:27,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:20:27,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420cc080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27, skipping insertion in model container [2022-01-10 08:20:27,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:20:27,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:20:27,458 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_2.cil-1+token_ring.03.cil-2.c[914,927] [2022-01-10 08:20:27,485 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_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2022-01-10 08:20:27,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:20:27,541 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:20:27,550 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_2.cil-1+token_ring.03.cil-2.c[914,927] [2022-01-10 08:20:27,561 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_2.cil-1+token_ring.03.cil-2.c[7115,7128] [2022-01-10 08:20:27,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:20:27,597 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:20:27,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27 WrapperNode [2022-01-10 08:20:27,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:20:27,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:20:27,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:20:27,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:20:27,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,639 INFO L137 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 497 [2022-01-10 08:20:27,640 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:20:27,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:20:27,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:20:27,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:20:27,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:20:27,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:20:27,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:20:27,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:20:27,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27" (1/1) ... [2022-01-10 08:20:27,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:20:27,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:20:27,715 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 08:20:27,723 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 08:20:27,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:20:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 08:20:27,738 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 08:20:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-01-10 08:20:27,738 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-01-10 08:20:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 08:20:27,738 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 08:20:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 08:20:27,738 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 08:20:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-01-10 08:20:27,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-01-10 08:20:27,738 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 08:20:27,739 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 08:20:27,739 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 08:20:27,739 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 08:20:27,739 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-01-10 08:20:27,739 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-01-10 08:20:27,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:20:27,739 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-01-10 08:20:27,739 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-01-10 08:20:27,739 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-01-10 08:20:27,739 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-01-10 08:20:27,739 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 08:20:27,739 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 08:20:27,739 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 08:20:27,739 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 08:20:27,740 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-01-10 08:20:27,740 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-01-10 08:20:27,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:20:27,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:20:27,740 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 08:20:27,740 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 08:20:27,805 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:20:27,807 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:20:28,212 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:20:28,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:20:28,218 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-01-10 08:20:28,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:20:28 BoogieIcfgContainer [2022-01-10 08:20:28,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:20:28,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:20:28,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:20:28,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:20:28,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:20:27" (1/3) ... [2022-01-10 08:20:28,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51dfbca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:20:28, skipping insertion in model container [2022-01-10 08:20:28,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:20:27" (2/3) ... [2022-01-10 08:20:28,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51dfbca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:20:28, skipping insertion in model container [2022-01-10 08:20:28,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:20:28" (3/3) ... [2022-01-10 08:20:28,227 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.03.cil-2.c [2022-01-10 08:20:28,230 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:20:28,230 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:20:28,268 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:20:28,272 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 08:20:28,273 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:20:28,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 210 states have (on average 1.5714285714285714) internal successors, (330), 216 states have internal predecessors, (330), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-10 08:20:28,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:20:28,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:28,294 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 08:20:28,294 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2111945575, now seen corresponding path program 1 times [2022-01-10 08:20:28,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:28,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840785900] [2022-01-10 08:20:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:28,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:28,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:28,310 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 08:20:28,312 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 08:20:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 08:20:28,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:28,612 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 08:20:28,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:28,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:28,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840785900] [2022-01-10 08:20:28,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840785900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:28,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:28,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:28,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320142425] [2022-01-10 08:20:28,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:28,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:28,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:28,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:28,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:28,648 INFO L87 Difference]: Start difference. First operand has 258 states, 210 states have (on average 1.5714285714285714) internal successors, (330), 216 states have internal predecessors, (330), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) 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 08:20:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:29,143 INFO L93 Difference]: Finished difference Result 600 states and 914 transitions. [2022-01-10 08:20:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:29,145 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 08:20:29,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:29,161 INFO L225 Difference]: With dead ends: 600 [2022-01-10 08:20:29,162 INFO L226 Difference]: Without dead ends: 351 [2022-01-10 08:20:29,167 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 08:20:29,169 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 297 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:29,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 955 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:20:29,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-10 08:20:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 344. [2022-01-10 08:20:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 278 states have (on average 1.4496402877697843) internal successors, (403), 284 states have internal predecessors, (403), 42 states have call successors, (42), 21 states have call predecessors, (42), 22 states have return successors, (45), 41 states have call predecessors, (45), 40 states have call successors, (45) [2022-01-10 08:20:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 490 transitions. [2022-01-10 08:20:29,215 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 490 transitions. Word has length 65 [2022-01-10 08:20:29,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:29,216 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 490 transitions. [2022-01-10 08:20:29,216 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 08:20:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 490 transitions. [2022-01-10 08:20:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:20:29,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:29,219 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 08:20:29,231 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 08:20:29,423 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 08:20:29,424 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:29,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1779235770, now seen corresponding path program 1 times [2022-01-10 08:20:29,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:29,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161579498] [2022-01-10 08:20:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:29,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:29,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:29,426 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 08:20:29,447 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 08:20:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:29,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:20:29,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:29,626 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 08:20:29,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:29,629 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:29,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161579498] [2022-01-10 08:20:29,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161579498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:29,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:29,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:29,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831264741] [2022-01-10 08:20:29,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:29,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:29,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:29,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:29,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:29,638 INFO L87 Difference]: Start difference. First operand 344 states and 490 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 08:20:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:30,001 INFO L93 Difference]: Finished difference Result 736 states and 1044 transitions. [2022-01-10 08:20:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:30,001 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 08:20:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:30,004 INFO L225 Difference]: With dead ends: 736 [2022-01-10 08:20:30,005 INFO L226 Difference]: Without dead ends: 557 [2022-01-10 08:20:30,005 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 08:20:30,006 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 284 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:30,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 950 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:20:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-10 08:20:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 549. [2022-01-10 08:20:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 439 states have (on average 1.4100227790432802) internal successors, (619), 453 states have internal predecessors, (619), 64 states have call successors, (64), 35 states have call predecessors, (64), 44 states have return successors, (87), 65 states have call predecessors, (87), 62 states have call successors, (87) [2022-01-10 08:20:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 770 transitions. [2022-01-10 08:20:30,039 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 770 transitions. Word has length 65 [2022-01-10 08:20:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:30,040 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 770 transitions. [2022-01-10 08:20:30,040 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 08:20:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 770 transitions. [2022-01-10 08:20:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:20:30,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:30,042 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 08:20:30,053 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 08:20:30,249 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 08:20:30,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:30,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:30,250 INFO L85 PathProgramCache]: Analyzing trace with hash 487145416, now seen corresponding path program 1 times [2022-01-10 08:20:30,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:30,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039406826] [2022-01-10 08:20:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:30,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:30,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:30,252 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 08:20:30,252 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 08:20:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:30,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:20:30,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:30,414 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 08:20:30,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:30,414 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:30,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039406826] [2022-01-10 08:20:30,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039406826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:30,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:30,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:20:30,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895912781] [2022-01-10 08:20:30,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:30,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:20:30,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:30,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:20:30,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:30,419 INFO L87 Difference]: Start difference. First operand 549 states and 770 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) 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), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:20:30,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:30,459 INFO L93 Difference]: Finished difference Result 939 states and 1302 transitions. [2022-01-10 08:20:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:30,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) 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), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:20:30,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:30,465 INFO L225 Difference]: With dead ends: 939 [2022-01-10 08:20:30,465 INFO L226 Difference]: Without dead ends: 569 [2022-01-10 08:20:30,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 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 08:20:30,467 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 7 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:30,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1774 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-10 08:20:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 559. [2022-01-10 08:20:30,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 447 states have (on average 1.3982102908277405) internal successors, (625), 461 states have internal predecessors, (625), 64 states have call successors, (64), 35 states have call predecessors, (64), 46 states have return successors, (89), 67 states have call predecessors, (89), 62 states have call successors, (89) [2022-01-10 08:20:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 778 transitions. [2022-01-10 08:20:30,498 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 778 transitions. Word has length 65 [2022-01-10 08:20:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:30,498 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 778 transitions. [2022-01-10 08:20:30,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) 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), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:20:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 778 transitions. [2022-01-10 08:20:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:20:30,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:30,500 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 08:20:30,518 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 08:20:30,700 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 08:20:30,701 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:30,701 INFO L85 PathProgramCache]: Analyzing trace with hash -542213882, now seen corresponding path program 1 times [2022-01-10 08:20:30,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:30,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767700546] [2022-01-10 08:20:30,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:30,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:30,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:30,703 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 08:20:30,703 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 08:20:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:30,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:20:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:30,853 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 08:20:30,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:30,854 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:30,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767700546] [2022-01-10 08:20:30,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767700546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:30,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:30,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:20:30,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138713838] [2022-01-10 08:20:30,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:30,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:20:30,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:30,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:20:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:20:30,855 INFO L87 Difference]: Start difference. First operand 559 states and 778 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) 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), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:20:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:30,885 INFO L93 Difference]: Finished difference Result 953 states and 1308 transitions. [2022-01-10 08:20:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:30,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) 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), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:20:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:30,888 INFO L225 Difference]: With dead ends: 953 [2022-01-10 08:20:30,888 INFO L226 Difference]: Without dead ends: 573 [2022-01-10 08:20:30,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 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 08:20:30,890 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 4 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1775 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:30,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1775 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-10 08:20:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 569. [2022-01-10 08:20:30,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 455 states have (on average 1.3868131868131868) internal successors, (631), 469 states have internal predecessors, (631), 64 states have call successors, (64), 35 states have call predecessors, (64), 48 states have return successors, (91), 69 states have call predecessors, (91), 62 states have call successors, (91) [2022-01-10 08:20:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 786 transitions. [2022-01-10 08:20:30,908 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 786 transitions. Word has length 65 [2022-01-10 08:20:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:30,908 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 786 transitions. [2022-01-10 08:20:30,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) 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), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:20:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 786 transitions. [2022-01-10 08:20:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:20:30,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:30,910 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 08:20:30,916 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 08:20:31,116 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 08:20:31,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:31,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash 843989512, now seen corresponding path program 1 times [2022-01-10 08:20:31,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:31,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083155444] [2022-01-10 08:20:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:31,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:31,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:31,118 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 08:20:31,119 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 08:20:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:31,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:31,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:31,258 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 08:20:31,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:31,258 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:31,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083155444] [2022-01-10 08:20:31,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083155444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:31,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:31,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:31,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444206293] [2022-01-10 08:20:31,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:31,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:20:31,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:31,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:20:31,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:20:31,260 INFO L87 Difference]: Start difference. First operand 569 states and 786 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 08:20:31,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:31,473 INFO L93 Difference]: Finished difference Result 1341 states and 1807 transitions. [2022-01-10 08:20:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:31,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-01-10 08:20:31,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:31,477 INFO L225 Difference]: With dead ends: 1341 [2022-01-10 08:20:31,477 INFO L226 Difference]: Without dead ends: 955 [2022-01-10 08:20:31,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 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 08:20:31,478 INFO L933 BasicCegarLoop]: 343 mSDtfsCounter, 468 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:31,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 563 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-01-10 08:20:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 951. [2022-01-10 08:20:31,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 747 states have (on average 1.3427041499330656) internal successors, (1003), 776 states have internal predecessors, (1003), 110 states have call successors, (110), 63 states have call predecessors, (110), 92 states have return successors, (176), 120 states have call predecessors, (176), 108 states have call successors, (176) [2022-01-10 08:20:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1289 transitions. [2022-01-10 08:20:31,515 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1289 transitions. Word has length 65 [2022-01-10 08:20:31,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:31,516 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 1289 transitions. [2022-01-10 08:20:31,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-01-10 08:20:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1289 transitions. [2022-01-10 08:20:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:20:31,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:31,519 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 08:20:31,537 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 08:20:31,726 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 08:20:31,726 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:31,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:31,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1077063563, now seen corresponding path program 1 times [2022-01-10 08:20:31,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:31,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15691493] [2022-01-10 08:20:31,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:31,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:31,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:31,728 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 08:20:31,728 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 08:20:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:31,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:31,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:31,893 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 08:20:31,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:31,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:31,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15691493] [2022-01-10 08:20:31,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15691493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:31,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:31,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:20:31,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563025210] [2022-01-10 08:20:31,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:31,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:31,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:31,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:31,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:31,894 INFO L87 Difference]: Start difference. First operand 951 states and 1289 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), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:20:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:31,939 INFO L93 Difference]: Finished difference Result 2367 states and 3136 transitions. [2022-01-10 08:20:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:31,939 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), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2022-01-10 08:20:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:31,944 INFO L225 Difference]: With dead ends: 2367 [2022-01-10 08:20:31,944 INFO L226 Difference]: Without dead ends: 1583 [2022-01-10 08:20:31,946 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 08:20:31,946 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 66 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:31,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 690 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2022-01-10 08:20:31,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1555. [2022-01-10 08:20:31,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1221 states have (on average 1.3120393120393121) internal successors, (1602), 1259 states have internal predecessors, (1602), 164 states have call successors, (164), 119 states have call predecessors, (164), 168 states have return successors, (256), 181 states have call predecessors, (256), 162 states have call successors, (256) [2022-01-10 08:20:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2022 transitions. [2022-01-10 08:20:31,986 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2022 transitions. Word has length 66 [2022-01-10 08:20:31,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:31,987 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 2022 transitions. [2022-01-10 08:20:31,987 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), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:20:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2022 transitions. [2022-01-10 08:20:31,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:20:31,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:31,988 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 08:20:31,994 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 08:20:32,194 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 08:20:32,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:32,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:32,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1759664074, now seen corresponding path program 1 times [2022-01-10 08:20:32,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:32,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904361232] [2022-01-10 08:20:32,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:32,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:32,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:32,196 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 08:20:32,197 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 08:20:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:32,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:32,344 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 08:20:32,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:32,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:32,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904361232] [2022-01-10 08:20:32,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904361232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:32,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:32,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:20:32,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301292723] [2022-01-10 08:20:32,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:32,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:32,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:32,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:32,346 INFO L87 Difference]: Start difference. First operand 1555 states and 2022 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), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:20:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:32,407 INFO L93 Difference]: Finished difference Result 4219 states and 5449 transitions. [2022-01-10 08:20:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:32,407 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), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 66 [2022-01-10 08:20:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:32,417 INFO L225 Difference]: With dead ends: 4219 [2022-01-10 08:20:32,418 INFO L226 Difference]: Without dead ends: 2839 [2022-01-10 08:20:32,421 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 08:20:32,421 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 290 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:32,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 476 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2839 states. [2022-01-10 08:20:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2839 to 2779. [2022-01-10 08:20:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2159 states have (on average 1.2783696155627606) internal successors, (2760), 2231 states have internal predecessors, (2760), 296 states have call successors, (296), 231 states have call predecessors, (296), 322 states have return successors, (468), 321 states have call predecessors, (468), 294 states have call successors, (468) [2022-01-10 08:20:32,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 3524 transitions. [2022-01-10 08:20:32,523 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 3524 transitions. Word has length 66 [2022-01-10 08:20:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:32,523 INFO L470 AbstractCegarLoop]: Abstraction has 2779 states and 3524 transitions. [2022-01-10 08:20:32,524 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), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:20:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 3524 transitions. [2022-01-10 08:20:32,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-10 08:20:32,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:32,525 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] [2022-01-10 08:20:32,531 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 08:20:32,731 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 08:20:32,734 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:32,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:32,734 INFO L85 PathProgramCache]: Analyzing trace with hash 825996842, now seen corresponding path program 1 times [2022-01-10 08:20:32,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:32,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778615408] [2022-01-10 08:20:32,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:32,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:32,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:32,736 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 08:20:32,737 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 08:20:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:32,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:32,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:32,883 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 08:20:32,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:32,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:32,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778615408] [2022-01-10 08:20:32,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778615408] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:32,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:32,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:20:32,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770541673] [2022-01-10 08:20:32,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:32,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:32,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:32,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:32,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:32,884 INFO L87 Difference]: Start difference. First operand 2779 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:20:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:32,952 INFO L93 Difference]: Finished difference Result 5991 states and 7538 transitions. [2022-01-10 08:20:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:32,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 72 [2022-01-10 08:20:32,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:32,965 INFO L225 Difference]: With dead ends: 5991 [2022-01-10 08:20:32,965 INFO L226 Difference]: Without dead ends: 3387 [2022-01-10 08:20:32,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 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 08:20:32,970 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 286 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:32,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 486 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3387 states. [2022-01-10 08:20:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3387 to 3343. [2022-01-10 08:20:33,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3343 states, 2595 states have (on average 1.2639691714836223) internal successors, (3280), 2675 states have internal predecessors, (3280), 360 states have call successors, (360), 287 states have call predecessors, (360), 386 states have return successors, (551), 385 states have call predecessors, (551), 358 states have call successors, (551) [2022-01-10 08:20:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3343 states to 3343 states and 4191 transitions. [2022-01-10 08:20:33,086 INFO L78 Accepts]: Start accepts. Automaton has 3343 states and 4191 transitions. Word has length 72 [2022-01-10 08:20:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:33,086 INFO L470 AbstractCegarLoop]: Abstraction has 3343 states and 4191 transitions. [2022-01-10 08:20:33,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:20:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3343 states and 4191 transitions. [2022-01-10 08:20:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-10 08:20:33,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:33,087 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:33,095 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 08:20:33,293 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 08:20:33,294 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:33,294 INFO L85 PathProgramCache]: Analyzing trace with hash -680171098, now seen corresponding path program 1 times [2022-01-10 08:20:33,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:33,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540486391] [2022-01-10 08:20:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:33,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:33,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:33,296 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 08:20:33,296 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 08:20:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:33,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:33,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:33,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:33,450 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:33,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540486391] [2022-01-10 08:20:33,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540486391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:33,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:33,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:33,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150629256] [2022-01-10 08:20:33,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:33,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:20:33,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:33,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:20:33,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:20:33,451 INFO L87 Difference]: Start difference. First operand 3343 states and 4191 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:20:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:33,586 INFO L93 Difference]: Finished difference Result 4023 states and 5024 transitions. [2022-01-10 08:20:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:20:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2022-01-10 08:20:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:33,599 INFO L225 Difference]: With dead ends: 4023 [2022-01-10 08:20:33,599 INFO L226 Difference]: Without dead ends: 4020 [2022-01-10 08:20:33,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 71 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 08:20:33,601 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 655 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:33,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 469 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:20:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4020 states. [2022-01-10 08:20:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4020 to 3978. [2022-01-10 08:20:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3085 states have (on average 1.2580226904376013) internal successors, (3881), 3179 states have internal predecessors, (3881), 425 states have call successors, (425), 343 states have call predecessors, (425), 466 states have return successors, (654), 460 states have call predecessors, (654), 424 states have call successors, (654) [2022-01-10 08:20:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 4960 transitions. [2022-01-10 08:20:33,730 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 4960 transitions. Word has length 73 [2022-01-10 08:20:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:33,730 INFO L470 AbstractCegarLoop]: Abstraction has 3978 states and 4960 transitions. [2022-01-10 08:20:33,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:20:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 4960 transitions. [2022-01-10 08:20:33,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 08:20:33,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:33,732 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:33,741 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 08:20:33,938 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 08:20:33,938 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:33,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:33,939 INFO L85 PathProgramCache]: Analyzing trace with hash 388759028, now seen corresponding path program 1 times [2022-01-10 08:20:33,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:33,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89358455] [2022-01-10 08:20:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:33,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:33,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:33,940 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 08:20:33,941 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 08:20:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:34,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:20:34,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:34,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:20:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:34,445 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:34,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89358455] [2022-01-10 08:20:34,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89358455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:20:34,445 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:20:34,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2022-01-10 08:20:34,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109046478] [2022-01-10 08:20:34,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:20:34,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 08:20:34,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 08:20:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:34,446 INFO L87 Difference]: Start difference. First operand 3978 states and 4960 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 08:20:34,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:34,863 INFO L93 Difference]: Finished difference Result 8961 states and 11160 transitions. [2022-01-10 08:20:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:20:34,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 74 [2022-01-10 08:20:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:34,889 INFO L225 Difference]: With dead ends: 8961 [2022-01-10 08:20:34,889 INFO L226 Difference]: Without dead ends: 8958 [2022-01-10 08:20:34,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:20:34,892 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 690 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:34,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [690 Valid, 2129 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8958 states. [2022-01-10 08:20:35,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8958 to 6560. [2022-01-10 08:20:35,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6560 states, 5087 states have (on average 1.2559465303715354) internal successors, (6389), 5247 states have internal predecessors, (6389), 689 states have call successors, (689), 567 states have call predecessors, (689), 782 states have return successors, (1088), 750 states have call predecessors, (1088), 688 states have call successors, (1088) [2022-01-10 08:20:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6560 states to 6560 states and 8166 transitions. [2022-01-10 08:20:35,124 INFO L78 Accepts]: Start accepts. Automaton has 6560 states and 8166 transitions. Word has length 74 [2022-01-10 08:20:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:35,124 INFO L470 AbstractCegarLoop]: Abstraction has 6560 states and 8166 transitions. [2022-01-10 08:20:35,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 4 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-01-10 08:20:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 6560 states and 8166 transitions. [2022-01-10 08:20:35,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-10 08:20:35,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:35,126 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:35,133 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 08:20:35,333 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 08:20:35,334 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:35,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1322076070, now seen corresponding path program 2 times [2022-01-10 08:20:35,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:35,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100082872] [2022-01-10 08:20:35,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:20:35,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:35,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:35,336 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 08:20:35,337 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 08:20:35,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 08:20:35,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:20:35,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:35,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:20:35,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:35,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:35,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100082872] [2022-01-10 08:20:35,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100082872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:35,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:35,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:20:35,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126364045] [2022-01-10 08:20:35,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:35,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:35,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:35,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:35,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:35,487 INFO L87 Difference]: Start difference. First operand 6560 states and 8166 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:20:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:35,654 INFO L93 Difference]: Finished difference Result 9807 states and 12298 transitions. [2022-01-10 08:20:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:35,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2022-01-10 08:20:35,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:35,669 INFO L225 Difference]: With dead ends: 9807 [2022-01-10 08:20:35,669 INFO L226 Difference]: Without dead ends: 3996 [2022-01-10 08:20:35,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 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 08:20:35,680 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 326 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:35,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 549 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2022-01-10 08:20:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 3964. [2022-01-10 08:20:35,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3964 states, 3075 states have (on average 1.2432520325203251) internal successors, (3823), 3165 states have internal predecessors, (3823), 425 states have call successors, (425), 343 states have call predecessors, (425), 462 states have return successors, (622), 460 states have call predecessors, (622), 424 states have call successors, (622) [2022-01-10 08:20:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3964 states to 3964 states and 4870 transitions. [2022-01-10 08:20:35,798 INFO L78 Accepts]: Start accepts. Automaton has 3964 states and 4870 transitions. Word has length 77 [2022-01-10 08:20:35,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:35,798 INFO L470 AbstractCegarLoop]: Abstraction has 3964 states and 4870 transitions. [2022-01-10 08:20:35,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-01-10 08:20:35,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3964 states and 4870 transitions. [2022-01-10 08:20:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:35,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:35,800 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] [2022-01-10 08:20:35,810 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 08:20:36,006 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 08:20:36,007 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:36,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:36,007 INFO L85 PathProgramCache]: Analyzing trace with hash -360800699, now seen corresponding path program 1 times [2022-01-10 08:20:36,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:36,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496940910] [2022-01-10 08:20:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:36,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:36,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:36,009 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 08:20:36,009 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 08:20:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:36,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:36,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:36,165 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 08:20:36,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:36,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:36,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496940910] [2022-01-10 08:20:36,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496940910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:36,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:36,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:36,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654186842] [2022-01-10 08:20:36,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:36,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:36,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:36,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:36,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:36,167 INFO L87 Difference]: Start difference. First operand 3964 states and 4870 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:36,550 INFO L93 Difference]: Finished difference Result 4258 states and 5314 transitions. [2022-01-10 08:20:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:36,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:36,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:36,561 INFO L225 Difference]: With dead ends: 4258 [2022-01-10 08:20:36,561 INFO L226 Difference]: Without dead ends: 4117 [2022-01-10 08:20:36,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 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 08:20:36,564 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 550 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:36,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 893 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:20:36,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2022-01-10 08:20:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 4106. [2022-01-10 08:20:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4106 states, 3198 states have (on average 1.2539086929330832) internal successors, (4010), 3289 states have internal predecessors, (4010), 437 states have call successors, (437), 349 states have call predecessors, (437), 469 states have return successors, (635), 472 states have call predecessors, (635), 436 states have call successors, (635) [2022-01-10 08:20:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 5082 transitions. [2022-01-10 08:20:36,689 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 5082 transitions. Word has length 79 [2022-01-10 08:20:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:36,689 INFO L470 AbstractCegarLoop]: Abstraction has 4106 states and 5082 transitions. [2022-01-10 08:20:36,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 5082 transitions. [2022-01-10 08:20:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:36,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:36,691 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] [2022-01-10 08:20:36,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 08:20:36,898 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 08:20:36,898 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash -123752503, now seen corresponding path program 1 times [2022-01-10 08:20:36,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:36,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454955954] [2022-01-10 08:20:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:36,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:36,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:36,900 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 08:20:36,904 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 08:20:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:36,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:36,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:37,050 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 08:20:37,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:37,051 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:37,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454955954] [2022-01-10 08:20:37,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454955954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:37,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:37,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:37,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294877147] [2022-01-10 08:20:37,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:37,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:37,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:37,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:37,062 INFO L87 Difference]: Start difference. First operand 4106 states and 5082 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:37,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:37,370 INFO L93 Difference]: Finished difference Result 4389 states and 5510 transitions. [2022-01-10 08:20:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:20:37,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:37,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:37,382 INFO L225 Difference]: With dead ends: 4389 [2022-01-10 08:20:37,383 INFO L226 Difference]: Without dead ends: 4106 [2022-01-10 08:20:37,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 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 08:20:37,386 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 445 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:37,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [466 Valid, 662 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:37,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2022-01-10 08:20:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4106. [2022-01-10 08:20:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4106 states, 3198 states have (on average 1.2517198248905566) internal successors, (4003), 3289 states have internal predecessors, (4003), 437 states have call successors, (437), 349 states have call predecessors, (437), 469 states have return successors, (635), 472 states have call predecessors, (635), 436 states have call successors, (635) [2022-01-10 08:20:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 5075 transitions. [2022-01-10 08:20:37,506 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 5075 transitions. Word has length 79 [2022-01-10 08:20:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:37,506 INFO L470 AbstractCegarLoop]: Abstraction has 4106 states and 5075 transitions. [2022-01-10 08:20:37,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 5075 transitions. [2022-01-10 08:20:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:37,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:37,508 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] [2022-01-10 08:20:37,516 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 08:20:37,716 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 08:20:37,716 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:37,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:37,717 INFO L85 PathProgramCache]: Analyzing trace with hash -116105787, now seen corresponding path program 1 times [2022-01-10 08:20:37,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:37,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281191917] [2022-01-10 08:20:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:37,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:37,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:37,718 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 08:20:37,719 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 08:20:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:37,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:37,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:37,882 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 08:20:37,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:37,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:37,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281191917] [2022-01-10 08:20:37,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281191917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:37,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:37,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:37,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473717431] [2022-01-10 08:20:37,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:37,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:37,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:37,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:37,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:37,884 INFO L87 Difference]: Start difference. First operand 4106 states and 5075 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:38,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:38,192 INFO L93 Difference]: Finished difference Result 4389 states and 5496 transitions. [2022-01-10 08:20:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:20:38,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:38,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:38,207 INFO L225 Difference]: With dead ends: 4389 [2022-01-10 08:20:38,207 INFO L226 Difference]: Without dead ends: 4106 [2022-01-10 08:20:38,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 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 08:20:38,210 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 439 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:38,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 655 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2022-01-10 08:20:38,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4106. [2022-01-10 08:20:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4106 states, 3198 states have (on average 1.24953095684803) internal successors, (3996), 3289 states have internal predecessors, (3996), 437 states have call successors, (437), 349 states have call predecessors, (437), 469 states have return successors, (635), 472 states have call predecessors, (635), 436 states have call successors, (635) [2022-01-10 08:20:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 5068 transitions. [2022-01-10 08:20:38,333 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 5068 transitions. Word has length 79 [2022-01-10 08:20:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:38,333 INFO L470 AbstractCegarLoop]: Abstraction has 4106 states and 5068 transitions. [2022-01-10 08:20:38,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:38,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 5068 transitions. [2022-01-10 08:20:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:38,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:38,334 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] [2022-01-10 08:20:38,345 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 08:20:38,541 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 08:20:38,541 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:38,542 INFO L85 PathProgramCache]: Analyzing trace with hash -392953783, now seen corresponding path program 1 times [2022-01-10 08:20:38,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:38,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659128495] [2022-01-10 08:20:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:38,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:38,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:38,543 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 08:20:38,543 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 08:20:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:38,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:38,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:38,688 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 08:20:38,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:38,688 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:38,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659128495] [2022-01-10 08:20:38,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659128495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:38,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:38,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:38,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024646733] [2022-01-10 08:20:38,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:38,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:38,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:38,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:38,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:38,689 INFO L87 Difference]: Start difference. First operand 4106 states and 5068 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:38,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:38,989 INFO L93 Difference]: Finished difference Result 4389 states and 5482 transitions. [2022-01-10 08:20:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:20:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:38,998 INFO L225 Difference]: With dead ends: 4389 [2022-01-10 08:20:38,999 INFO L226 Difference]: Without dead ends: 4106 [2022-01-10 08:20:39,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 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 08:20:39,001 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 433 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:39,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 648 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2022-01-10 08:20:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4106. [2022-01-10 08:20:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4106 states, 3198 states have (on average 1.2473420888055033) internal successors, (3989), 3289 states have internal predecessors, (3989), 437 states have call successors, (437), 349 states have call predecessors, (437), 469 states have return successors, (635), 472 states have call predecessors, (635), 436 states have call successors, (635) [2022-01-10 08:20:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4106 states to 4106 states and 5061 transitions. [2022-01-10 08:20:39,127 INFO L78 Accepts]: Start accepts. Automaton has 4106 states and 5061 transitions. Word has length 79 [2022-01-10 08:20:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:39,128 INFO L470 AbstractCegarLoop]: Abstraction has 4106 states and 5061 transitions. [2022-01-10 08:20:39,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4106 states and 5061 transitions. [2022-01-10 08:20:39,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:39,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:39,129 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] [2022-01-10 08:20:39,141 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 08:20:39,336 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 08:20:39,336 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:39,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:39,337 INFO L85 PathProgramCache]: Analyzing trace with hash 152304965, now seen corresponding path program 1 times [2022-01-10 08:20:39,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:39,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985887498] [2022-01-10 08:20:39,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:39,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:39,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:39,338 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 08:20:39,339 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 08:20:39,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:39,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:39,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:39,504 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 08:20:39,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:39,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:39,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985887498] [2022-01-10 08:20:39,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985887498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:39,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:39,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:39,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880482601] [2022-01-10 08:20:39,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:39,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:39,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:39,505 INFO L87 Difference]: Start difference. First operand 4106 states and 5061 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:39,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:39,856 INFO L93 Difference]: Finished difference Result 4455 states and 5568 transitions. [2022-01-10 08:20:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:39,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:39,865 INFO L225 Difference]: With dead ends: 4455 [2022-01-10 08:20:39,865 INFO L226 Difference]: Without dead ends: 4172 [2022-01-10 08:20:39,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 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 08:20:39,867 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 463 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:39,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 640 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2022-01-10 08:20:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 4172. [2022-01-10 08:20:40,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4172 states, 3258 states have (on average 1.247391037446286) internal successors, (4064), 3349 states have internal predecessors, (4064), 439 states have call successors, (439), 353 states have call predecessors, (439), 473 states have return successors, (637), 474 states have call predecessors, (637), 438 states have call successors, (637) [2022-01-10 08:20:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4172 states to 4172 states and 5140 transitions. [2022-01-10 08:20:40,031 INFO L78 Accepts]: Start accepts. Automaton has 4172 states and 5140 transitions. Word has length 79 [2022-01-10 08:20:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:40,031 INFO L470 AbstractCegarLoop]: Abstraction has 4172 states and 5140 transitions. [2022-01-10 08:20:40,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:40,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4172 states and 5140 transitions. [2022-01-10 08:20:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:40,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:40,033 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] [2022-01-10 08:20:40,039 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 08:20:40,239 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 08:20:40,240 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2113879623, now seen corresponding path program 1 times [2022-01-10 08:20:40,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:40,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226736316] [2022-01-10 08:20:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:40,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:40,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:40,241 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 08:20:40,244 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 08:20:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:40,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:40,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:40,397 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 08:20:40,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:40,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:40,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226736316] [2022-01-10 08:20:40,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226736316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:40,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:40,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:40,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850322141] [2022-01-10 08:20:40,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:40,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:40,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:40,399 INFO L87 Difference]: Start difference. First operand 4172 states and 5140 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:40,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:40,730 INFO L93 Difference]: Finished difference Result 4587 states and 5726 transitions. [2022-01-10 08:20:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:40,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:40,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:40,745 INFO L225 Difference]: With dead ends: 4587 [2022-01-10 08:20:40,745 INFO L226 Difference]: Without dead ends: 4238 [2022-01-10 08:20:40,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 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 08:20:40,747 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 456 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:40,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 634 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4238 states. [2022-01-10 08:20:40,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4238 to 4238. [2022-01-10 08:20:40,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4238 states, 3318 states have (on average 1.246232670283303) internal successors, (4135), 3409 states have internal predecessors, (4135), 441 states have call successors, (441), 357 states have call predecessors, (441), 477 states have return successors, (639), 476 states have call predecessors, (639), 440 states have call successors, (639) [2022-01-10 08:20:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4238 states to 4238 states and 5215 transitions. [2022-01-10 08:20:40,904 INFO L78 Accepts]: Start accepts. Automaton has 4238 states and 5215 transitions. Word has length 79 [2022-01-10 08:20:40,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:40,905 INFO L470 AbstractCegarLoop]: Abstraction has 4238 states and 5215 transitions. [2022-01-10 08:20:40,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4238 states and 5215 transitions. [2022-01-10 08:20:40,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:40,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:40,906 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] [2022-01-10 08:20:40,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:41,113 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 08:20:41,113 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:41,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:41,114 INFO L85 PathProgramCache]: Analyzing trace with hash 641116100, now seen corresponding path program 1 times [2022-01-10 08:20:41,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:41,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588513836] [2022-01-10 08:20:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:41,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:41,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:41,115 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 08:20:41,117 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 08:20:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:41,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:41,279 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 08:20:41,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:41,279 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:41,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588513836] [2022-01-10 08:20:41,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588513836] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:41,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:41,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:41,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319465325] [2022-01-10 08:20:41,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:41,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:41,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:41,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:41,280 INFO L87 Difference]: Start difference. First operand 4238 states and 5215 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:41,651 INFO L93 Difference]: Finished difference Result 4719 states and 5876 transitions. [2022-01-10 08:20:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:41,659 INFO L225 Difference]: With dead ends: 4719 [2022-01-10 08:20:41,659 INFO L226 Difference]: Without dead ends: 4304 [2022-01-10 08:20:41,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 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 08:20:41,661 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 449 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:41,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 625 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4304 states. [2022-01-10 08:20:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4304 to 4304. [2022-01-10 08:20:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3378 states have (on average 1.2439313203078746) internal successors, (4202), 3469 states have internal predecessors, (4202), 443 states have call successors, (443), 361 states have call predecessors, (443), 481 states have return successors, (641), 478 states have call predecessors, (641), 442 states have call successors, (641) [2022-01-10 08:20:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5286 transitions. [2022-01-10 08:20:41,816 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5286 transitions. Word has length 79 [2022-01-10 08:20:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:41,816 INFO L470 AbstractCegarLoop]: Abstraction has 4304 states and 5286 transitions. [2022-01-10 08:20:41,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5286 transitions. [2022-01-10 08:20:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:41,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:41,818 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] [2022-01-10 08:20:41,829 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 08:20:42,029 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 08:20:42,029 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:42,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1308645825, now seen corresponding path program 1 times [2022-01-10 08:20:42,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974151530] [2022-01-10 08:20:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:42,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:42,031 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 08:20:42,035 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 08:20:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:42,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:42,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:42,176 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 08:20:42,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:42,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:42,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974151530] [2022-01-10 08:20:42,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974151530] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:42,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:42,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:42,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307458720] [2022-01-10 08:20:42,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:42,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:42,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:42,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:42,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:42,177 INFO L87 Difference]: Start difference. First operand 4304 states and 5286 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:42,321 INFO L93 Difference]: Finished difference Result 4882 states and 6057 transitions. [2022-01-10 08:20:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:42,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:42,329 INFO L225 Difference]: With dead ends: 4882 [2022-01-10 08:20:42,330 INFO L226 Difference]: Without dead ends: 4402 [2022-01-10 08:20:42,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 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 08:20:42,332 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 128 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1389 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 08:20:42,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1389 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:42,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2022-01-10 08:20:42,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 4310. [2022-01-10 08:20:42,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4310 states, 3384 states have (on average 1.241725768321513) internal successors, (4202), 3475 states have internal predecessors, (4202), 443 states have call successors, (443), 361 states have call predecessors, (443), 481 states have return successors, (641), 478 states have call predecessors, (641), 442 states have call successors, (641) [2022-01-10 08:20:42,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4310 states to 4310 states and 5286 transitions. [2022-01-10 08:20:42,472 INFO L78 Accepts]: Start accepts. Automaton has 4310 states and 5286 transitions. Word has length 79 [2022-01-10 08:20:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:42,472 INFO L470 AbstractCegarLoop]: Abstraction has 4310 states and 5286 transitions. [2022-01-10 08:20:42,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:42,472 INFO L276 IsEmpty]: Start isEmpty. Operand 4310 states and 5286 transitions. [2022-01-10 08:20:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:42,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:42,473 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] [2022-01-10 08:20:42,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 08:20:42,680 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 08:20:42,680 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1293127107, now seen corresponding path program 1 times [2022-01-10 08:20:42,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:42,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467127090] [2022-01-10 08:20:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:42,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:42,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:42,682 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 08:20:42,684 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 08:20:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:42,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:42,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:42,833 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 08:20:42,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:42,833 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:42,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467127090] [2022-01-10 08:20:42,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467127090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:42,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:42,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:42,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828952235] [2022-01-10 08:20:42,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:42,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:42,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:42,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:42,834 INFO L87 Difference]: Start difference. First operand 4310 states and 5286 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:42,981 INFO L93 Difference]: Finished difference Result 4866 states and 6021 transitions. [2022-01-10 08:20:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:42,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:42,990 INFO L225 Difference]: With dead ends: 4866 [2022-01-10 08:20:42,990 INFO L226 Difference]: Without dead ends: 4380 [2022-01-10 08:20:42,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 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 08:20:42,993 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 89 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1382 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 08:20:42,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1382 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4380 states. [2022-01-10 08:20:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4380 to 4316. [2022-01-10 08:20:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4316 states, 3390 states have (on average 1.23952802359882) internal successors, (4202), 3481 states have internal predecessors, (4202), 443 states have call successors, (443), 361 states have call predecessors, (443), 481 states have return successors, (641), 478 states have call predecessors, (641), 442 states have call successors, (641) [2022-01-10 08:20:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4316 states to 4316 states and 5286 transitions. [2022-01-10 08:20:43,142 INFO L78 Accepts]: Start accepts. Automaton has 4316 states and 5286 transitions. Word has length 79 [2022-01-10 08:20:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:43,143 INFO L470 AbstractCegarLoop]: Abstraction has 4316 states and 5286 transitions. [2022-01-10 08:20:43,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4316 states and 5286 transitions. [2022-01-10 08:20:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:43,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:43,145 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] [2022-01-10 08:20:43,168 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 08:20:43,351 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 08:20:43,352 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:43,352 INFO L85 PathProgramCache]: Analyzing trace with hash 395733829, now seen corresponding path program 1 times [2022-01-10 08:20:43,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:43,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114464593] [2022-01-10 08:20:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:43,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:43,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:43,353 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 08:20:43,371 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 08:20:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:43,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:43,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:43,508 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 08:20:43,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:43,508 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:43,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114464593] [2022-01-10 08:20:43,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114464593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:43,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:43,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:43,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867655319] [2022-01-10 08:20:43,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:43,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:43,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:43,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:43,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:43,509 INFO L87 Difference]: Start difference. First operand 4316 states and 5286 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:43,657 INFO L93 Difference]: Finished difference Result 4976 states and 6149 transitions. [2022-01-10 08:20:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:43,669 INFO L225 Difference]: With dead ends: 4976 [2022-01-10 08:20:43,669 INFO L226 Difference]: Without dead ends: 4484 [2022-01-10 08:20:43,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 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 08:20:43,672 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 50 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1359 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 08:20:43,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1359 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2022-01-10 08:20:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 4340. [2022-01-10 08:20:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4340 states, 3414 states have (on average 1.2378441710603398) internal successors, (4226), 3505 states have internal predecessors, (4226), 443 states have call successors, (443), 361 states have call predecessors, (443), 481 states have return successors, (641), 478 states have call predecessors, (641), 442 states have call successors, (641) [2022-01-10 08:20:43,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4340 states to 4340 states and 5310 transitions. [2022-01-10 08:20:43,870 INFO L78 Accepts]: Start accepts. Automaton has 4340 states and 5310 transitions. Word has length 79 [2022-01-10 08:20:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:43,870 INFO L470 AbstractCegarLoop]: Abstraction has 4340 states and 5310 transitions. [2022-01-10 08:20:43,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 4340 states and 5310 transitions. [2022-01-10 08:20:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:43,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:43,872 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] [2022-01-10 08:20:43,893 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 08:20:44,079 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 08:20:44,079 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:44,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:44,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1055265351, now seen corresponding path program 1 times [2022-01-10 08:20:44,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:44,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398475222] [2022-01-10 08:20:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:44,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:44,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:44,081 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 08:20:44,083 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 08:20:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:44,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:44,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:44,242 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 08:20:44,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:44,243 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:44,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398475222] [2022-01-10 08:20:44,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398475222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:44,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:44,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:20:44,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507011201] [2022-01-10 08:20:44,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:44,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:44,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:44,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:44,244 INFO L87 Difference]: Start difference. First operand 4340 states and 5310 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:44,405 INFO L93 Difference]: Finished difference Result 4870 states and 5993 transitions. [2022-01-10 08:20:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:44,414 INFO L225 Difference]: With dead ends: 4870 [2022-01-10 08:20:44,414 INFO L226 Difference]: Without dead ends: 4354 [2022-01-10 08:20:44,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 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 08:20:44,418 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 10 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1339 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 08:20:44,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1339 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2022-01-10 08:20:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 4346. [2022-01-10 08:20:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4346 states, 3420 states have (on average 1.235672514619883) internal successors, (4226), 3511 states have internal predecessors, (4226), 443 states have call successors, (443), 361 states have call predecessors, (443), 481 states have return successors, (641), 478 states have call predecessors, (641), 442 states have call successors, (641) [2022-01-10 08:20:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4346 states to 4346 states and 5310 transitions. [2022-01-10 08:20:44,572 INFO L78 Accepts]: Start accepts. Automaton has 4346 states and 5310 transitions. Word has length 79 [2022-01-10 08:20:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:44,572 INFO L470 AbstractCegarLoop]: Abstraction has 4346 states and 5310 transitions. [2022-01-10 08:20:44,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4346 states and 5310 transitions. [2022-01-10 08:20:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:44,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:44,574 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] [2022-01-10 08:20:44,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:44,780 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 08:20:44,781 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:44,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:44,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1756865225, now seen corresponding path program 1 times [2022-01-10 08:20:44,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:44,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444247009] [2022-01-10 08:20:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:44,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:44,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:44,782 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 08:20:44,784 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 08:20:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:44,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:20:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:44,985 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 08:20:44,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:44,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:44,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444247009] [2022-01-10 08:20:44,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444247009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:44,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:44,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:44,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427985445] [2022-01-10 08:20:44,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:44,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:20:44,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:44,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:20:44,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:20:44,986 INFO L87 Difference]: Start difference. First operand 4346 states and 5310 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:45,355 INFO L93 Difference]: Finished difference Result 4933 states and 6050 transitions. [2022-01-10 08:20:45,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:20:45,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-01-10 08:20:45,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:45,364 INFO L225 Difference]: With dead ends: 4933 [2022-01-10 08:20:45,364 INFO L226 Difference]: Without dead ends: 4410 [2022-01-10 08:20:45,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 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 08:20:45,367 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 418 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:45,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 632 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:45,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2022-01-10 08:20:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 4388. [2022-01-10 08:20:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 3460 states have (on average 1.2297687861271676) internal successors, (4255), 3551 states have internal predecessors, (4255), 443 states have call successors, (443), 363 states have call predecessors, (443), 483 states have return successors, (641), 478 states have call predecessors, (641), 442 states have call successors, (641) [2022-01-10 08:20:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 5339 transitions. [2022-01-10 08:20:45,553 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 5339 transitions. Word has length 79 [2022-01-10 08:20:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:45,553 INFO L470 AbstractCegarLoop]: Abstraction has 4388 states and 5339 transitions. [2022-01-10 08:20:45,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:20:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 5339 transitions. [2022-01-10 08:20:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 08:20:45,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:45,555 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] [2022-01-10 08:20:45,563 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 08:20:45,755 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 08:20:45,756 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:45,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:45,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2115400245, now seen corresponding path program 1 times [2022-01-10 08:20:45,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:45,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423535484] [2022-01-10 08:20:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:45,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:45,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:45,757 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 08:20:45,759 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 08:20:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:45,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:45,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:45,931 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 08:20:45,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:45,931 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:45,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423535484] [2022-01-10 08:20:45,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423535484] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:45,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:45,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:20:45,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006885456] [2022-01-10 08:20:45,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:45,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:45,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:45,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:45,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:45,932 INFO L87 Difference]: Start difference. First operand 4388 states and 5339 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:20:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:46,090 INFO L93 Difference]: Finished difference Result 5491 states and 6678 transitions. [2022-01-10 08:20:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 79 [2022-01-10 08:20:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:46,099 INFO L225 Difference]: With dead ends: 5491 [2022-01-10 08:20:46,100 INFO L226 Difference]: Without dead ends: 4927 [2022-01-10 08:20:46,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 77 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 08:20:46,103 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 248 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 554 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 08:20:46,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 554 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4927 states. [2022-01-10 08:20:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4927 to 4925. [2022-01-10 08:20:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4925 states, 3939 states have (on average 1.2239146991622238) internal successors, (4821), 4033 states have internal predecessors, (4821), 474 states have call successors, (474), 389 states have call predecessors, (474), 510 states have return successors, (673), 507 states have call predecessors, (673), 473 states have call successors, (673) [2022-01-10 08:20:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4925 states to 4925 states and 5968 transitions. [2022-01-10 08:20:46,301 INFO L78 Accepts]: Start accepts. Automaton has 4925 states and 5968 transitions. Word has length 79 [2022-01-10 08:20:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:46,301 INFO L470 AbstractCegarLoop]: Abstraction has 4925 states and 5968 transitions. [2022-01-10 08:20:46,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:20:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4925 states and 5968 transitions. [2022-01-10 08:20:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 08:20:46,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:46,303 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] [2022-01-10 08:20:46,309 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 08:20:46,509 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 08:20:46,510 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:46,510 INFO L85 PathProgramCache]: Analyzing trace with hash -40676858, now seen corresponding path program 1 times [2022-01-10 08:20:46,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:46,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652176692] [2022-01-10 08:20:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:46,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:46,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:46,512 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 08:20:46,513 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 08:20:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:46,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:46,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:46,672 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 08:20:46,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:46,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:46,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652176692] [2022-01-10 08:20:46,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652176692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:46,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:46,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:20:46,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861213382] [2022-01-10 08:20:46,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:46,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:46,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:46,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:46,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:46,673 INFO L87 Difference]: Start difference. First operand 4925 states and 5968 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 08:20:46,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:46,992 INFO L93 Difference]: Finished difference Result 11948 states and 14513 transitions. [2022-01-10 08:20:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:46,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 84 [2022-01-10 08:20:46,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:47,007 INFO L225 Difference]: With dead ends: 11948 [2022-01-10 08:20:47,007 INFO L226 Difference]: Without dead ends: 6725 [2022-01-10 08:20:47,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 82 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 08:20:47,016 INFO L933 BasicCegarLoop]: 424 mSDtfsCounter, 89 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:47,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 749 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6725 states. [2022-01-10 08:20:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6725 to 6725. [2022-01-10 08:20:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6725 states, 5301 states have (on average 1.2152424070930012) internal successors, (6442), 5440 states have internal predecessors, (6442), 672 states have call successors, (672), 557 states have call predecessors, (672), 750 states have return successors, (997), 732 states have call predecessors, (997), 671 states have call successors, (997) [2022-01-10 08:20:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6725 states to 6725 states and 8111 transitions. [2022-01-10 08:20:47,321 INFO L78 Accepts]: Start accepts. Automaton has 6725 states and 8111 transitions. Word has length 84 [2022-01-10 08:20:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:47,321 INFO L470 AbstractCegarLoop]: Abstraction has 6725 states and 8111 transitions. [2022-01-10 08:20:47,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 08:20:47,322 INFO L276 IsEmpty]: Start isEmpty. Operand 6725 states and 8111 transitions. [2022-01-10 08:20:47,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 08:20:47,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:47,324 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 08:20:47,332 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 08:20:47,531 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 08:20:47,531 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:47,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:47,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2090825654, now seen corresponding path program 1 times [2022-01-10 08:20:47,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:47,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905574794] [2022-01-10 08:20:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:47,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:47,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:47,533 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 08:20:47,535 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 08:20:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:47,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:20:47,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:20:47,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:47,715 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:47,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905574794] [2022-01-10 08:20:47,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905574794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:47,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:47,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:47,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538351864] [2022-01-10 08:20:47,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:47,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:20:47,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:47,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:20:47,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:20:47,717 INFO L87 Difference]: Start difference. First operand 6725 states and 8111 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 08:20:48,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:48,117 INFO L93 Difference]: Finished difference Result 12340 states and 14911 transitions. [2022-01-10 08:20:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:48,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 92 [2022-01-10 08:20:48,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:48,132 INFO L225 Difference]: With dead ends: 12340 [2022-01-10 08:20:48,132 INFO L226 Difference]: Without dead ends: 6755 [2022-01-10 08:20:48,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 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 08:20:48,142 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 412 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:48,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 517 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:20:48,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6755 states. [2022-01-10 08:20:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6755 to 6755. [2022-01-10 08:20:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 5316 states have (on average 1.2022197140707298) internal successors, (6391), 5470 states have internal predecessors, (6391), 672 states have call successors, (672), 557 states have call predecessors, (672), 765 states have return successors, (997), 732 states have call predecessors, (997), 671 states have call successors, (997) [2022-01-10 08:20:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 8060 transitions. [2022-01-10 08:20:48,479 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 8060 transitions. Word has length 92 [2022-01-10 08:20:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:48,479 INFO L470 AbstractCegarLoop]: Abstraction has 6755 states and 8060 transitions. [2022-01-10 08:20:48,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 08:20:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 8060 transitions. [2022-01-10 08:20:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 08:20:48,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:48,482 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:20:48,490 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 08:20:48,688 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 08:20:48,689 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:48,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:48,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1005107396, now seen corresponding path program 1 times [2022-01-10 08:20:48,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:48,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436113310] [2022-01-10 08:20:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:48,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:48,691 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 08:20:48,692 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 08:20:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:48,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:48,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:20:48,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:48,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:48,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436113310] [2022-01-10 08:20:48,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436113310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:48,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:48,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:20:48,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533103470] [2022-01-10 08:20:48,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:48,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:48,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:48,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:48,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:48,838 INFO L87 Difference]: Start difference. First operand 6755 states and 8060 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 08:20:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:49,086 INFO L93 Difference]: Finished difference Result 12107 states and 14444 transitions. [2022-01-10 08:20:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:49,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 93 [2022-01-10 08:20:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:49,102 INFO L225 Difference]: With dead ends: 12107 [2022-01-10 08:20:49,102 INFO L226 Difference]: Without dead ends: 6482 [2022-01-10 08:20:49,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 08:20:49,113 INFO L933 BasicCegarLoop]: 417 mSDtfsCounter, 102 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 739 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 08:20:49,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 739 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:49,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6482 states. [2022-01-10 08:20:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6482 to 6479. [2022-01-10 08:20:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6479 states, 5110 states have (on average 1.1919765166340508) internal successors, (6091), 5258 states have internal predecessors, (6091), 634 states have call successors, (634), 529 states have call predecessors, (634), 733 states have return successors, (880), 694 states have call predecessors, (880), 633 states have call successors, (880) [2022-01-10 08:20:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6479 states to 6479 states and 7605 transitions. [2022-01-10 08:20:49,405 INFO L78 Accepts]: Start accepts. Automaton has 6479 states and 7605 transitions. Word has length 93 [2022-01-10 08:20:49,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:49,406 INFO L470 AbstractCegarLoop]: Abstraction has 6479 states and 7605 transitions. [2022-01-10 08:20:49,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 08:20:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6479 states and 7605 transitions. [2022-01-10 08:20:49,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-10 08:20:49,409 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:49,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:49,415 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 08:20:49,615 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 08:20:49,615 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1390397438, now seen corresponding path program 1 times [2022-01-10 08:20:49,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:49,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007476903] [2022-01-10 08:20:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:49,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:49,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:49,617 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 08:20:49,618 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 08:20:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:49,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:49,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 08:20:49,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:49,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:49,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007476903] [2022-01-10 08:20:49,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007476903] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:49,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:49,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:20:49,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523599744] [2022-01-10 08:20:49,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:49,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:49,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:49,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:49,854 INFO L87 Difference]: Start difference. First operand 6479 states and 7605 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:20:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:50,144 INFO L93 Difference]: Finished difference Result 8490 states and 10020 transitions. [2022-01-10 08:20:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:50,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2022-01-10 08:20:50,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:50,157 INFO L225 Difference]: With dead ends: 8490 [2022-01-10 08:20:50,157 INFO L226 Difference]: Without dead ends: 7389 [2022-01-10 08:20:50,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 126 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 08:20:50,160 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 238 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 551 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 08:20:50,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 551 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:50,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7389 states. [2022-01-10 08:20:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7389 to 7379. [2022-01-10 08:20:50,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7379 states, 5910 states have (on average 1.189678510998308) internal successors, (7031), 6062 states have internal predecessors, (7031), 688 states have call successors, (688), 573 states have call predecessors, (688), 779 states have return successors, (936), 746 states have call predecessors, (936), 687 states have call successors, (936) [2022-01-10 08:20:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7379 states to 7379 states and 8655 transitions. [2022-01-10 08:20:50,534 INFO L78 Accepts]: Start accepts. Automaton has 7379 states and 8655 transitions. Word has length 128 [2022-01-10 08:20:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:50,534 INFO L470 AbstractCegarLoop]: Abstraction has 7379 states and 8655 transitions. [2022-01-10 08:20:50,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:20:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 7379 states and 8655 transitions. [2022-01-10 08:20:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-10 08:20:50,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:50,538 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:50,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:50,745 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 08:20:50,745 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:50,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1564754241, now seen corresponding path program 1 times [2022-01-10 08:20:50,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:50,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207100222] [2022-01-10 08:20:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:50,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:50,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:50,747 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 08:20:50,747 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 08:20:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:50,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:20:50,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:20:51,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:51,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:51,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207100222] [2022-01-10 08:20:51,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207100222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:51,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:51,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:51,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297199243] [2022-01-10 08:20:51,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:51,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:20:51,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:20:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:20:51,017 INFO L87 Difference]: Start difference. First operand 7379 states and 8655 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:51,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:51,566 INFO L93 Difference]: Finished difference Result 11255 states and 13244 transitions. [2022-01-10 08:20:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:51,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 128 [2022-01-10 08:20:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:51,585 INFO L225 Difference]: With dead ends: 11255 [2022-01-10 08:20:51,585 INFO L226 Difference]: Without dead ends: 9255 [2022-01-10 08:20:51,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 126 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 08:20:51,592 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 387 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:51,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 749 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:51,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9255 states. [2022-01-10 08:20:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9255 to 9253. [2022-01-10 08:20:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9253 states, 7573 states have (on average 1.1842070513666976) internal successors, (8968), 7738 states have internal predecessors, (8968), 799 states have call successors, (799), 661 states have call predecessors, (799), 879 states have return successors, (1083), 857 states have call predecessors, (1083), 798 states have call successors, (1083) [2022-01-10 08:20:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9253 states to 9253 states and 10850 transitions. [2022-01-10 08:20:52,001 INFO L78 Accepts]: Start accepts. Automaton has 9253 states and 10850 transitions. Word has length 128 [2022-01-10 08:20:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:52,002 INFO L470 AbstractCegarLoop]: Abstraction has 9253 states and 10850 transitions. [2022-01-10 08:20:52,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 9253 states and 10850 transitions. [2022-01-10 08:20:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-10 08:20:52,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:52,006 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:52,015 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 08:20:52,213 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 08:20:52,213 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:52,213 INFO L85 PathProgramCache]: Analyzing trace with hash 282581955, now seen corresponding path program 1 times [2022-01-10 08:20:52,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:52,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993216071] [2022-01-10 08:20:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:52,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:52,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:52,215 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 08:20:52,216 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 08:20:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:52,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:52,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:20:52,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:52,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:52,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993216071] [2022-01-10 08:20:52,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993216071] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:52,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:52,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:20:52,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632339838] [2022-01-10 08:20:52,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:52,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:52,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:52,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:52,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:52,417 INFO L87 Difference]: Start difference. First operand 9253 states and 10850 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:20:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:52,710 INFO L93 Difference]: Finished difference Result 12229 states and 14337 transitions. [2022-01-10 08:20:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:52,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2022-01-10 08:20:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:52,725 INFO L225 Difference]: With dead ends: 12229 [2022-01-10 08:20:52,725 INFO L226 Difference]: Without dead ends: 8355 [2022-01-10 08:20:52,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 126 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 08:20:52,775 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 196 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 459 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 08:20:52,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 459 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8355 states. [2022-01-10 08:20:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8355 to 8355. [2022-01-10 08:20:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8355 states, 6778 states have (on average 1.1853053998229566) internal successors, (8034), 6938 states have internal predecessors, (8034), 742 states have call successors, (742), 617 states have call predecessors, (742), 833 states have return successors, (1012), 802 states have call predecessors, (1012), 741 states have call successors, (1012) [2022-01-10 08:20:53,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8355 states to 8355 states and 9788 transitions. [2022-01-10 08:20:53,111 INFO L78 Accepts]: Start accepts. Automaton has 8355 states and 9788 transitions. Word has length 128 [2022-01-10 08:20:53,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:53,111 INFO L470 AbstractCegarLoop]: Abstraction has 8355 states and 9788 transitions. [2022-01-10 08:20:53,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:20:53,111 INFO L276 IsEmpty]: Start isEmpty. Operand 8355 states and 9788 transitions. [2022-01-10 08:20:53,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-10 08:20:53,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:53,115 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:53,121 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 08:20:53,315 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 08:20:53,315 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:53,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:53,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1456813631, now seen corresponding path program 1 times [2022-01-10 08:20:53,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:53,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636173476] [2022-01-10 08:20:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:53,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:53,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:53,317 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 08:20:53,317 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 08:20:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:53,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:20:53,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:20:53,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:53,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:53,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636173476] [2022-01-10 08:20:53,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636173476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:53,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:53,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:53,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401038231] [2022-01-10 08:20:53,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:53,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:20:53,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:53,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:20:53,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:20:53,557 INFO L87 Difference]: Start difference. First operand 8355 states and 9788 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:54,153 INFO L93 Difference]: Finished difference Result 13822 states and 16207 transitions. [2022-01-10 08:20:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:54,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2022-01-10 08:20:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:54,171 INFO L225 Difference]: With dead ends: 13822 [2022-01-10 08:20:54,171 INFO L226 Difference]: Without dead ends: 10846 [2022-01-10 08:20:54,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 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 08:20:54,177 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 378 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:54,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 724 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:20:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10846 states. [2022-01-10 08:20:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10846 to 10844. [2022-01-10 08:20:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10844 states, 8980 states have (on average 1.1796213808463252) internal successors, (10593), 9161 states have internal predecessors, (10593), 891 states have call successors, (891), 733 states have call predecessors, (891), 971 states have return successors, (1207), 953 states have call predecessors, (1207), 890 states have call successors, (1207) [2022-01-10 08:20:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10844 states to 10844 states and 12691 transitions. [2022-01-10 08:20:54,634 INFO L78 Accepts]: Start accepts. Automaton has 10844 states and 12691 transitions. Word has length 129 [2022-01-10 08:20:54,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:54,634 INFO L470 AbstractCegarLoop]: Abstraction has 10844 states and 12691 transitions. [2022-01-10 08:20:54,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:54,634 INFO L276 IsEmpty]: Start isEmpty. Operand 10844 states and 12691 transitions. [2022-01-10 08:20:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-10 08:20:54,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:54,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:54,646 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 08:20:54,845 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 08:20:54,846 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1555981379, now seen corresponding path program 1 times [2022-01-10 08:20:54,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:54,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545903350] [2022-01-10 08:20:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:54,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:54,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:54,848 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 08:20:54,848 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 08:20:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:54,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:54,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:20:55,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:55,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:55,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545903350] [2022-01-10 08:20:55,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545903350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:55,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:55,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:20:55,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141770741] [2022-01-10 08:20:55,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:55,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:55,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:55,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:55,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:55,054 INFO L87 Difference]: Start difference. First operand 10844 states and 12691 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:20:55,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:55,595 INFO L93 Difference]: Finished difference Result 16304 states and 19072 transitions. [2022-01-10 08:20:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:55,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-01-10 08:20:55,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:55,618 INFO L225 Difference]: With dead ends: 16304 [2022-01-10 08:20:55,618 INFO L226 Difference]: Without dead ends: 10839 [2022-01-10 08:20:55,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 08:20:55,630 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 194 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 458 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 08:20:55,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 458 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10839 states. [2022-01-10 08:20:56,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10839 to 10839. [2022-01-10 08:20:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10839 states, 8978 states have (on average 1.1794386277567388) internal successors, (10589), 9158 states have internal predecessors, (10589), 888 states have call successors, (888), 733 states have call predecessors, (888), 971 states have return successors, (1204), 950 states have call predecessors, (1204), 887 states have call successors, (1204) [2022-01-10 08:20:56,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10839 states to 10839 states and 12681 transitions. [2022-01-10 08:20:56,103 INFO L78 Accepts]: Start accepts. Automaton has 10839 states and 12681 transitions. Word has length 129 [2022-01-10 08:20:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:56,104 INFO L470 AbstractCegarLoop]: Abstraction has 10839 states and 12681 transitions. [2022-01-10 08:20:56,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:20:56,105 INFO L276 IsEmpty]: Start isEmpty. Operand 10839 states and 12681 transitions. [2022-01-10 08:20:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-10 08:20:56,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:56,109 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:56,116 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 08:20:56,309 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 08:20:56,310 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:56,310 INFO L85 PathProgramCache]: Analyzing trace with hash -815830851, now seen corresponding path program 1 times [2022-01-10 08:20:56,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:56,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323094820] [2022-01-10 08:20:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:56,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:56,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:56,311 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 08:20:56,312 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 08:20:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:56,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:20:56,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:20:56,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:56,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:56,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323094820] [2022-01-10 08:20:56,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323094820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:56,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:56,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:20:56,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109237990] [2022-01-10 08:20:56,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:56,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:20:56,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:56,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:20:56,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:20:56,571 INFO L87 Difference]: Start difference. First operand 10839 states and 12681 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:57,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:57,337 INFO L93 Difference]: Finished difference Result 20787 states and 24326 transitions. [2022-01-10 08:20:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:20:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-01-10 08:20:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:57,409 INFO L225 Difference]: With dead ends: 20787 [2022-01-10 08:20:57,409 INFO L226 Difference]: Without dead ends: 15327 [2022-01-10 08:20:57,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 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 08:20:57,423 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 375 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:20:57,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 683 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:20:57,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15327 states. [2022-01-10 08:20:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15327 to 15325. [2022-01-10 08:20:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15325 states, 12925 states have (on average 1.1730754352030948) internal successors, (15162), 13154 states have internal predecessors, (15162), 1159 states have call successors, (1159), 941 states have call predecessors, (1159), 1239 states have return successors, (1583), 1233 states have call predecessors, (1583), 1158 states have call successors, (1583) [2022-01-10 08:20:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15325 states to 15325 states and 17904 transitions. [2022-01-10 08:20:58,169 INFO L78 Accepts]: Start accepts. Automaton has 15325 states and 17904 transitions. Word has length 130 [2022-01-10 08:20:58,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:58,170 INFO L470 AbstractCegarLoop]: Abstraction has 15325 states and 17904 transitions. [2022-01-10 08:20:58,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:20:58,170 INFO L276 IsEmpty]: Start isEmpty. Operand 15325 states and 17904 transitions. [2022-01-10 08:20:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-10 08:20:58,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:58,176 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:20:58,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 08:20:58,382 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 08:20:58,383 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:20:58,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:20:58,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2098003137, now seen corresponding path program 1 times [2022-01-10 08:20:58,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:20:58,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168785021] [2022-01-10 08:20:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:20:58,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:20:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:20:58,384 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 08:20:58,385 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 08:20:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:20:58,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:20:58,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:20:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:20:58,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:20:58,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:20:58,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168785021] [2022-01-10 08:20:58,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168785021] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:20:58,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:20:58,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:20:58,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837374156] [2022-01-10 08:20:58,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:20:58,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:20:58,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:20:58,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:20:58,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:20:58,585 INFO L87 Difference]: Start difference. First operand 15325 states and 17904 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:20:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:20:59,265 INFO L93 Difference]: Finished difference Result 25267 states and 29501 transitions. [2022-01-10 08:20:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:20:59,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 130 [2022-01-10 08:20:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:20:59,298 INFO L225 Difference]: With dead ends: 25267 [2022-01-10 08:20:59,298 INFO L226 Difference]: Without dead ends: 15321 [2022-01-10 08:20:59,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 128 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 08:20:59,312 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 192 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 457 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 08:20:59,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 457 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:20:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15321 states. [2022-01-10 08:20:59,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15321 to 15321. [2022-01-10 08:20:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15321 states, 12924 states have (on average 1.1730114515629837) internal successors, (15160), 13152 states have internal predecessors, (15160), 1156 states have call successors, (1156), 941 states have call predecessors, (1156), 1239 states have return successors, (1580), 1230 states have call predecessors, (1580), 1155 states have call successors, (1580) [2022-01-10 08:20:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15321 states to 15321 states and 17896 transitions. [2022-01-10 08:20:59,993 INFO L78 Accepts]: Start accepts. Automaton has 15321 states and 17896 transitions. Word has length 130 [2022-01-10 08:20:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:20:59,993 INFO L470 AbstractCegarLoop]: Abstraction has 15321 states and 17896 transitions. [2022-01-10 08:20:59,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:20:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 15321 states and 17896 transitions. [2022-01-10 08:20:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 08:20:59,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:20:59,999 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:21:00,006 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 08:21:00,199 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 08:21:00,200 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:00,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash 760590917, now seen corresponding path program 1 times [2022-01-10 08:21:00,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:00,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285944991] [2022-01-10 08:21:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:00,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:00,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:00,201 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 08:21:00,202 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 08:21:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:00,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:21:00,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:00,394 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:00,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285944991] [2022-01-10 08:21:00,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285944991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:00,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:00,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:00,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490032927] [2022-01-10 08:21:00,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:00,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:00,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:00,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:00,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:00,395 INFO L87 Difference]: Start difference. First operand 15321 states and 17896 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:21:01,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:01,318 INFO L93 Difference]: Finished difference Result 32946 states and 38635 transitions. [2022-01-10 08:21:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:01,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 131 [2022-01-10 08:21:01,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:01,361 INFO L225 Difference]: With dead ends: 32946 [2022-01-10 08:21:01,362 INFO L226 Difference]: Without dead ends: 19205 [2022-01-10 08:21:01,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 08:21:01,383 INFO L933 BasicCegarLoop]: 497 mSDtfsCounter, 160 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:01,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 818 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:01,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19205 states. [2022-01-10 08:21:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19205 to 19205. [2022-01-10 08:21:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19205 states, 16348 states have (on average 1.1693785172498166) internal successors, (19117), 16598 states have internal predecessors, (19117), 1400 states have call successors, (1400), 1125 states have call predecessors, (1400), 1455 states have return successors, (1922), 1484 states have call predecessors, (1922), 1399 states have call successors, (1922) [2022-01-10 08:21:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19205 states to 19205 states and 22439 transitions. [2022-01-10 08:21:02,280 INFO L78 Accepts]: Start accepts. Automaton has 19205 states and 22439 transitions. Word has length 131 [2022-01-10 08:21:02,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:02,280 INFO L470 AbstractCegarLoop]: Abstraction has 19205 states and 22439 transitions. [2022-01-10 08:21:02,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:21:02,280 INFO L276 IsEmpty]: Start isEmpty. Operand 19205 states and 22439 transitions. [2022-01-10 08:21:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 08:21:02,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:02,289 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1] [2022-01-10 08:21:02,297 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 08:21:02,495 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 08:21:02,495 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1829844995, now seen corresponding path program 1 times [2022-01-10 08:21:02,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:02,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573607576] [2022-01-10 08:21:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:02,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:02,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:02,497 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 08:21:02,500 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 08:21:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:02,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:02,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-01-10 08:21:02,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:02,735 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:02,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573607576] [2022-01-10 08:21:02,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573607576] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:02,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:02,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:02,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046528483] [2022-01-10 08:21:02,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:02,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:02,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:02,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:02,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:02,736 INFO L87 Difference]: Start difference. First operand 19205 states and 22439 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 08:21:04,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:04,005 INFO L93 Difference]: Finished difference Result 27114 states and 31783 transitions. [2022-01-10 08:21:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:21:04,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 159 [2022-01-10 08:21:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:04,048 INFO L225 Difference]: With dead ends: 27114 [2022-01-10 08:21:04,048 INFO L226 Difference]: Without dead ends: 21545 [2022-01-10 08:21:04,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:21:04,065 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 444 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:04,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 672 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:21:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21545 states. [2022-01-10 08:21:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21545 to 21192. [2022-01-10 08:21:05,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21192 states, 17846 states have (on average 1.1714669954051329) internal successors, (20906), 18132 states have internal predecessors, (20906), 1620 states have call successors, (1620), 1314 states have call predecessors, (1620), 1724 states have return successors, (2216), 1747 states have call predecessors, (2216), 1619 states have call successors, (2216) [2022-01-10 08:21:05,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21192 states to 21192 states and 24742 transitions. [2022-01-10 08:21:05,100 INFO L78 Accepts]: Start accepts. Automaton has 21192 states and 24742 transitions. Word has length 159 [2022-01-10 08:21:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:05,100 INFO L470 AbstractCegarLoop]: Abstraction has 21192 states and 24742 transitions. [2022-01-10 08:21:05,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 08:21:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 21192 states and 24742 transitions. [2022-01-10 08:21:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 08:21:05,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:05,109 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 08:21:05,115 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 08:21:05,313 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 08:21:05,313 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:05,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash -228006700, now seen corresponding path program 1 times [2022-01-10 08:21:05,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:05,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479657026] [2022-01-10 08:21:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:05,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:05,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:05,315 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 08:21:05,316 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 08:21:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:05,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:21:05,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:05,606 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:05,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479657026] [2022-01-10 08:21:05,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479657026] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:05,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:05,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:21:05,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772517830] [2022-01-10 08:21:05,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:05,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:05,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:05,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:05,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:05,607 INFO L87 Difference]: Start difference. First operand 21192 states and 24742 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 08:21:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:06,710 INFO L93 Difference]: Finished difference Result 38901 states and 45490 transitions. [2022-01-10 08:21:06,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 168 [2022-01-10 08:21:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:06,768 INFO L225 Difference]: With dead ends: 38901 [2022-01-10 08:21:06,768 INFO L226 Difference]: Without dead ends: 25074 [2022-01-10 08:21:06,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 166 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 08:21:06,795 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 215 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 518 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 08:21:06,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 518 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:06,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25074 states. [2022-01-10 08:21:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25074 to 25002. [2022-01-10 08:21:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25002 states, 21200 states have (on average 1.1642452830188679) internal successors, (24682), 21506 states have internal predecessors, (24682), 1864 states have call successors, (1864), 1498 states have call predecessors, (1864), 1936 states have return successors, (2524), 1999 states have call predecessors, (2524), 1863 states have call successors, (2524) [2022-01-10 08:21:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25002 states to 25002 states and 29070 transitions. [2022-01-10 08:21:08,046 INFO L78 Accepts]: Start accepts. Automaton has 25002 states and 29070 transitions. Word has length 168 [2022-01-10 08:21:08,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:08,046 INFO L470 AbstractCegarLoop]: Abstraction has 25002 states and 29070 transitions. [2022-01-10 08:21:08,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 08:21:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 25002 states and 29070 transitions. [2022-01-10 08:21:08,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-10 08:21:08,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:08,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 08:21:08,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:08,259 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 08:21:08,259 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash 525371858, now seen corresponding path program 1 times [2022-01-10 08:21:08,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:08,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381509292] [2022-01-10 08:21:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:08,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:08,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:08,261 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 08:21:08,262 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 08:21:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:08,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:21:08,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:08,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:08,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381509292] [2022-01-10 08:21:08,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381509292] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:08,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:08,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:21:08,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961420374] [2022-01-10 08:21:08,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:08,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:21:08,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:08,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:21:08,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:21:08,562 INFO L87 Difference]: Start difference. First operand 25002 states and 29070 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 08:21:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:09,967 INFO L93 Difference]: Finished difference Result 42844 states and 49899 transitions. [2022-01-10 08:21:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:21:09,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 188 [2022-01-10 08:21:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:10,041 INFO L225 Difference]: With dead ends: 42844 [2022-01-10 08:21:10,041 INFO L226 Difference]: Without dead ends: 25208 [2022-01-10 08:21:10,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 186 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 08:21:10,074 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 396 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:10,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 616 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:21:10,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25208 states. [2022-01-10 08:21:11,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25208 to 25208. [2022-01-10 08:21:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25208 states, 21382 states have (on average 1.1571415209054345) internal successors, (24742), 21700 states have internal predecessors, (24742), 1864 states have call successors, (1864), 1498 states have call predecessors, (1864), 1960 states have return successors, (2422), 2011 states have call predecessors, (2422), 1863 states have call successors, (2422) [2022-01-10 08:21:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25208 states to 25208 states and 29028 transitions. [2022-01-10 08:21:11,388 INFO L78 Accepts]: Start accepts. Automaton has 25208 states and 29028 transitions. Word has length 188 [2022-01-10 08:21:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:11,388 INFO L470 AbstractCegarLoop]: Abstraction has 25208 states and 29028 transitions. [2022-01-10 08:21:11,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 08:21:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 25208 states and 29028 transitions. [2022-01-10 08:21:11,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-10 08:21:11,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:11,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 08:21:11,408 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 08:21:11,601 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 08:21:11,601 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1048774918, now seen corresponding path program 1 times [2022-01-10 08:21:11,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:11,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196112498] [2022-01-10 08:21:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:11,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:11,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:11,603 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 08:21:11,603 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 08:21:11,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:11,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:11,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-10 08:21:11,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:11,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:11,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196112498] [2022-01-10 08:21:11,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196112498] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:11,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:11,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:11,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830962620] [2022-01-10 08:21:11,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:11,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:11,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:11,916 INFO L87 Difference]: Start difference. First operand 25208 states and 29028 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 08:21:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:13,657 INFO L93 Difference]: Finished difference Result 51664 states and 60238 transitions. [2022-01-10 08:21:13,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:13,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 189 [2022-01-10 08:21:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:13,729 INFO L225 Difference]: With dead ends: 51664 [2022-01-10 08:21:13,729 INFO L226 Difference]: Without dead ends: 37614 [2022-01-10 08:21:13,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 187 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 08:21:13,751 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 302 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:13,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 526 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37614 states. [2022-01-10 08:21:15,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37614 to 37120. [2022-01-10 08:21:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37120 states, 31870 states have (on average 1.1486664574835268) internal successors, (36608), 32276 states have internal predecessors, (36608), 2620 states have call successors, (2620), 2074 states have call predecessors, (2620), 2628 states have return successors, (3692), 2771 states have call predecessors, (3692), 2619 states have call successors, (3692) [2022-01-10 08:21:15,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37120 states to 37120 states and 42920 transitions. [2022-01-10 08:21:15,726 INFO L78 Accepts]: Start accepts. Automaton has 37120 states and 42920 transitions. Word has length 189 [2022-01-10 08:21:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:15,727 INFO L470 AbstractCegarLoop]: Abstraction has 37120 states and 42920 transitions. [2022-01-10 08:21:15,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 08:21:15,727 INFO L276 IsEmpty]: Start isEmpty. Operand 37120 states and 42920 transitions. [2022-01-10 08:21:15,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-10 08:21:15,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:15,742 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 08:21:15,751 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 08:21:15,943 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 08:21:15,944 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:15,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:15,944 INFO L85 PathProgramCache]: Analyzing trace with hash -250885805, now seen corresponding path program 1 times [2022-01-10 08:21:15,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:15,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742379505] [2022-01-10 08:21:15,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:15,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:15,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:15,946 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 08:21:15,946 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 08:21:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:16,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:16,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:21:16,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:16,214 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:16,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742379505] [2022-01-10 08:21:16,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742379505] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:16,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:16,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:16,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484218400] [2022-01-10 08:21:16,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:16,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:16,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:16,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:16,215 INFO L87 Difference]: Start difference. First operand 37120 states and 42920 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 08:21:18,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:18,181 INFO L93 Difference]: Finished difference Result 63084 states and 72978 transitions. [2022-01-10 08:21:18,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:18,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 189 [2022-01-10 08:21:18,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:18,254 INFO L225 Difference]: With dead ends: 63084 [2022-01-10 08:21:18,254 INFO L226 Difference]: Without dead ends: 32870 [2022-01-10 08:21:18,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 187 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 08:21:18,286 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 151 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:18,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 778 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32870 states. [2022-01-10 08:21:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32870 to 32835. [2022-01-10 08:21:19,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32835 states, 28097 states have (on average 1.1468484179805674) internal successors, (32223), 28467 states have internal predecessors, (32223), 2352 states have call successors, (2352), 1866 states have call predecessors, (2352), 2384 states have return successors, (3210), 2503 states have call predecessors, (3210), 2351 states have call successors, (3210) [2022-01-10 08:21:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32835 states to 32835 states and 37785 transitions. [2022-01-10 08:21:19,994 INFO L78 Accepts]: Start accepts. Automaton has 32835 states and 37785 transitions. Word has length 189 [2022-01-10 08:21:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:19,994 INFO L470 AbstractCegarLoop]: Abstraction has 32835 states and 37785 transitions. [2022-01-10 08:21:19,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-01-10 08:21:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 32835 states and 37785 transitions. [2022-01-10 08:21:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-10 08:21:20,011 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:20,011 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 08:21:20,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-01-10 08:21:20,212 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 08:21:20,212 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:20,213 INFO L85 PathProgramCache]: Analyzing trace with hash -477052926, now seen corresponding path program 1 times [2022-01-10 08:21:20,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:20,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160222938] [2022-01-10 08:21:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:20,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:20,214 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 08:21:20,215 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 08:21:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:20,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:20,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-01-10 08:21:20,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:20,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:20,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160222938] [2022-01-10 08:21:20,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160222938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:20,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:20,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:21:20,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412226758] [2022-01-10 08:21:20,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:20,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:20,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:20,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:20,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:20,596 INFO L87 Difference]: Start difference. First operand 32835 states and 37785 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-01-10 08:21:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:22,323 INFO L93 Difference]: Finished difference Result 61729 states and 70888 transitions. [2022-01-10 08:21:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 226 [2022-01-10 08:21:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:22,406 INFO L225 Difference]: With dead ends: 61729 [2022-01-10 08:21:22,406 INFO L226 Difference]: Without dead ends: 36259 [2022-01-10 08:21:22,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 224 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 08:21:22,444 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 196 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 515 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 08:21:22,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 515 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36259 states. [2022-01-10 08:21:24,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36259 to 36115. [2022-01-10 08:21:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36115 states, 30977 states have (on average 1.1417180488749719) internal successors, (35367), 31363 states have internal predecessors, (35367), 2572 states have call successors, (2572), 2026 states have call predecessors, (2572), 2564 states have return successors, (3462), 2727 states have call predecessors, (3462), 2571 states have call successors, (3462) [2022-01-10 08:21:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36115 states to 36115 states and 41401 transitions. [2022-01-10 08:21:24,443 INFO L78 Accepts]: Start accepts. Automaton has 36115 states and 41401 transitions. Word has length 226 [2022-01-10 08:21:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:24,443 INFO L470 AbstractCegarLoop]: Abstraction has 36115 states and 41401 transitions. [2022-01-10 08:21:24,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-01-10 08:21:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 36115 states and 41401 transitions. [2022-01-10 08:21:24,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-10 08:21:24,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:24,461 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:21:24,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:24,668 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 08:21:24,669 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:24,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1657616188, now seen corresponding path program 1 times [2022-01-10 08:21:24,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:24,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811475985] [2022-01-10 08:21:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:24,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:24,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:24,671 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 08:21:24,672 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 08:21:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:24,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:21:24,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-01-10 08:21:25,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:25,003 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:25,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811475985] [2022-01-10 08:21:25,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811475985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:25,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:25,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:21:25,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835333232] [2022-01-10 08:21:25,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:25,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:21:25,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:25,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:21:25,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:25,004 INFO L87 Difference]: Start difference. First operand 36115 states and 41401 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:21:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:26,454 INFO L93 Difference]: Finished difference Result 40325 states and 46448 transitions. [2022-01-10 08:21:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:21:26,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 239 [2022-01-10 08:21:26,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:26,519 INFO L225 Difference]: With dead ends: 40325 [2022-01-10 08:21:26,520 INFO L226 Difference]: Without dead ends: 32982 [2022-01-10 08:21:26,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 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 08:21:26,541 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 34 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1608 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:26,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1608 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32982 states. [2022-01-10 08:21:28,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32982 to 32018. [2022-01-10 08:21:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32018 states, 27968 states have (on average 1.1356550343249427) internal successors, (31762), 28230 states have internal predecessors, (31762), 2077 states have call successors, (2077), 1587 states have call predecessors, (2077), 1971 states have return successors, (2783), 2201 states have call predecessors, (2783), 2076 states have call successors, (2783) [2022-01-10 08:21:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32018 states to 32018 states and 36622 transitions. [2022-01-10 08:21:28,305 INFO L78 Accepts]: Start accepts. Automaton has 32018 states and 36622 transitions. Word has length 239 [2022-01-10 08:21:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:28,305 INFO L470 AbstractCegarLoop]: Abstraction has 32018 states and 36622 transitions. [2022-01-10 08:21:28,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 5 states have internal predecessors, (125), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:21:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 32018 states and 36622 transitions. [2022-01-10 08:21:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-10 08:21:28,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:28,323 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:21:28,330 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 08:21:28,530 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 08:21:28,530 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:28,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1530967941, now seen corresponding path program 1 times [2022-01-10 08:21:28,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:28,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439259701] [2022-01-10 08:21:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:28,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:28,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:28,532 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 08:21:28,533 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 08:21:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:28,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:28,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 08:21:28,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:28,849 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:28,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439259701] [2022-01-10 08:21:28,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439259701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:28,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:28,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:28,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422048319] [2022-01-10 08:21:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:28,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:28,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:28,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:28,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:28,850 INFO L87 Difference]: Start difference. First operand 32018 states and 36622 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 08:21:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:30,129 INFO L93 Difference]: Finished difference Result 51014 states and 58484 transitions. [2022-01-10 08:21:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:30,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 230 [2022-01-10 08:21:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:30,187 INFO L225 Difference]: With dead ends: 51014 [2022-01-10 08:21:30,187 INFO L226 Difference]: Without dead ends: 25545 [2022-01-10 08:21:30,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 228 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 08:21:30,221 INFO L933 BasicCegarLoop]: 472 mSDtfsCounter, 147 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:30,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 791 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25545 states. [2022-01-10 08:21:31,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25545 to 25540. [2022-01-10 08:21:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25540 states, 22270 states have (on average 1.1364167040862145) internal successors, (25308), 22490 states have internal predecessors, (25308), 1657 states have call successors, (1657), 1267 states have call predecessors, (1657), 1611 states have return successors, (2243), 1783 states have call predecessors, (2243), 1656 states have call successors, (2243) [2022-01-10 08:21:31,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25540 states to 25540 states and 29208 transitions. [2022-01-10 08:21:31,583 INFO L78 Accepts]: Start accepts. Automaton has 25540 states and 29208 transitions. Word has length 230 [2022-01-10 08:21:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:31,583 INFO L470 AbstractCegarLoop]: Abstraction has 25540 states and 29208 transitions. [2022-01-10 08:21:31,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 08:21:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 25540 states and 29208 transitions. [2022-01-10 08:21:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-01-10 08:21:31,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:31,596 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 08:21:31,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-01-10 08:21:31,796 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 08:21:31,797 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash -44041944, now seen corresponding path program 1 times [2022-01-10 08:21:31,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:31,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1516297209] [2022-01-10 08:21:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:31,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:31,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:31,799 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 08:21:31,799 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 08:21:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:31,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:21:31,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 08:21:32,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:32,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:32,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1516297209] [2022-01-10 08:21:32,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1516297209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:32,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:32,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:21:32,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855434667] [2022-01-10 08:21:32,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:32,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:21:32,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:32,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:21:32,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:21:32,175 INFO L87 Difference]: Start difference. First operand 25540 states and 29208 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-01-10 08:21:33,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:33,523 INFO L93 Difference]: Finished difference Result 30792 states and 35473 transitions. [2022-01-10 08:21:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:21:33,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 252 [2022-01-10 08:21:33,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:33,578 INFO L225 Difference]: With dead ends: 30792 [2022-01-10 08:21:33,578 INFO L226 Difference]: Without dead ends: 25607 [2022-01-10 08:21:33,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 250 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 08:21:33,593 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 244 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:33,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 462 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:21:33,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25607 states. [2022-01-10 08:21:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25607 to 25540. [2022-01-10 08:21:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25540 states, 22270 states have (on average 1.1350246969016615) internal successors, (25277), 22490 states have internal predecessors, (25277), 1657 states have call successors, (1657), 1267 states have call predecessors, (1657), 1611 states have return successors, (2243), 1783 states have call predecessors, (2243), 1656 states have call successors, (2243) [2022-01-10 08:21:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25540 states to 25540 states and 29177 transitions. [2022-01-10 08:21:35,077 INFO L78 Accepts]: Start accepts. Automaton has 25540 states and 29177 transitions. Word has length 252 [2022-01-10 08:21:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:21:35,077 INFO L470 AbstractCegarLoop]: Abstraction has 25540 states and 29177 transitions. [2022-01-10 08:21:35,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-01-10 08:21:35,077 INFO L276 IsEmpty]: Start isEmpty. Operand 25540 states and 29177 transitions. [2022-01-10 08:21:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-10 08:21:35,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:21:35,089 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 08:21:35,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-01-10 08:21:35,289 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 08:21:35,289 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:21:35,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:21:35,290 INFO L85 PathProgramCache]: Analyzing trace with hash -270515303, now seen corresponding path program 1 times [2022-01-10 08:21:35,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:21:35,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168907346] [2022-01-10 08:21:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:21:35,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:21:35,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:21:35,291 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 08:21:35,292 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 08:21:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:21:35,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:21:35,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:21:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-01-10 08:21:35,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:21:35,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:21:35,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168907346] [2022-01-10 08:21:35,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168907346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:21:35,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:21:35,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:21:35,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210684943] [2022-01-10 08:21:35,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:21:35,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:21:35,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:21:35,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:21:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:21:35,644 INFO L87 Difference]: Start difference. First operand 25540 states and 29177 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 4 states have internal predecessors, (154), 3 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-01-10 08:21:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:21:37,068 INFO L93 Difference]: Finished difference Result 27159 states and 31060 transitions. [2022-01-10 08:21:37,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:21:37,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 4 states have internal predecessors, (154), 3 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 253 [2022-01-10 08:21:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:21:37,100 INFO L225 Difference]: With dead ends: 27159 [2022-01-10 08:21:37,100 INFO L226 Difference]: Without dead ends: 23978 [2022-01-10 08:21:37,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:21:37,106 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 152 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:21:37,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 873 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:21:37,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23978 states.