/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:23:59,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:23:59,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:23:59,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:23:59,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:23:59,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:23:59,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:23:59,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:23:59,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:23:59,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:23:59,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:23:59,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:23:59,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:23:59,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:23:59,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:23:59,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:23:59,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:23:59,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:23:59,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:23:59,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:23:59,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:23:59,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:23:59,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:23:59,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:23:59,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 08:23:59,335 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 08:23:59,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 08:23:59,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 08:23:59,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 08:23:59,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 08:23:59,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 08:23:59,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 08:23:59,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 08:23:59,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 08:23:59,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 08:23:59,340 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 08:23:59,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 08:23:59,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 08:23:59,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:23:59,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:23:59,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:23:59,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 08:23:59,365 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:23:59,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:23:59,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:23:59,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:23:59,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:23:59,367 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:23:59,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:23:59,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:23:59,368 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:23:59,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:23:59,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:23:59,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:23:59,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:23:59,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:23:59,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:23:59,369 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:23:59,369 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:23:59,369 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:23:59,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:23:59,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:23:59,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:23:59,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:23:59,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:23:59,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:23:59,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:23:59,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:23:59,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:23:59,371 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:23:59,371 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:23:59,371 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:23:59,372 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:23:59,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:23:59,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:23:59,372 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:23:59,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:23:59,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:23:59,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:23:59,632 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:23:59,635 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:23:59,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-01-10 08:23:59,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc0a8ea5/d32a957fad494f9ca792289e06dac7f6/FLAG775d2d117 [2022-01-10 08:24:00,175 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:24:00,176 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-01-10 08:24:00,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc0a8ea5/d32a957fad494f9ca792289e06dac7f6/FLAG775d2d117 [2022-01-10 08:24:00,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cc0a8ea5/d32a957fad494f9ca792289e06dac7f6 [2022-01-10 08:24:00,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:24:00,667 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:24:00,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:24:00,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:24:00,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:24:00,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:24:00" (1/1) ... [2022-01-10 08:24:00,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73363667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:00, skipping insertion in model container [2022-01-10 08:24:00,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:24:00" (1/1) ... [2022-01-10 08:24:00,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:24:00,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:24:00,892 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[911,924] [2022-01-10 08:24:00,937 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[8416,8429] [2022-01-10 08:24:01,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:24:01,043 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:24:01,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[911,924] [2022-01-10 08:24:01,084 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c[8416,8429] [2022-01-10 08:24:01,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:24:01,162 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:24:01,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01 WrapperNode [2022-01-10 08:24:01,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:24:01,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:24:01,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:24:01,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:24:01,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01" (1/1) ... [2022-01-10 08:24:01,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01" (1/1) ... [2022-01-10 08:24:01,269 INFO L137 Inliner]: procedures = 76, calls = 92, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 930 [2022-01-10 08:24:01,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:24:01,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:24:01,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:24:01,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:24:01,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01" (1/1) ... [2022-01-10 08:24:01,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01" (1/1) ... [2022-01-10 08:24:01,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01" (1/1) ... [2022-01-10 08:24:01,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01" (1/1) ... [2022-01-10 08:24:01,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01" (1/1) ... [2022-01-10 08:24:01,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01" (1/1) ... [2022-01-10 08:24:01,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01" (1/1) ... [2022-01-10 08:24:01,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:24:01,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:24:01,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:24:01,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:24:01,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01" (1/1) ... [2022-01-10 08:24:01,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:24:01,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:24:01,389 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 08:24:01,404 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 08:24:01,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:24:01,427 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 08:24:01,427 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 08:24:01,427 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-01-10 08:24:01,427 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-01-10 08:24:01,428 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 08:24:01,429 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 08:24:01,429 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 08:24:01,429 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 08:24:01,429 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-01-10 08:24:01,429 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-01-10 08:24:01,429 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 08:24:01,429 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 08:24:01,429 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 08:24:01,430 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 08:24:01,430 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-01-10 08:24:01,430 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-01-10 08:24:01,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:24:01,430 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-01-10 08:24:01,430 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-01-10 08:24:01,431 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-01-10 08:24:01,431 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-01-10 08:24:01,432 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 08:24:01,432 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 08:24:01,432 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 08:24:01,432 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 08:24:01,432 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-01-10 08:24:01,432 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-01-10 08:24:01,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:24:01,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:24:01,432 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 08:24:01,433 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 08:24:01,433 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-01-10 08:24:01,433 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-01-10 08:24:01,583 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:24:01,584 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:24:02,268 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1bv32 == ~q_free~0); [2022-01-10 08:24:02,268 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1bv32 == ~q_free~0;~c_dr_st~0 := 2bv32;~c_dr_pc~0 := 2bv32;~a_t~0 := do_read_c_~a~0#1; [2022-01-10 08:24:02,347 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:24:02,359 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:24:02,359 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2022-01-10 08:24:02,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:24:02 BoogieIcfgContainer [2022-01-10 08:24:02,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:24:02,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:24:02,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:24:02,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:24:02,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:24:00" (1/3) ... [2022-01-10 08:24:02,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc264d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:24:02, skipping insertion in model container [2022-01-10 08:24:02,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:24:01" (2/3) ... [2022-01-10 08:24:02,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc264d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:24:02, skipping insertion in model container [2022-01-10 08:24:02,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:24:02" (3/3) ... [2022-01-10 08:24:02,370 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.10.cil-1.c [2022-01-10 08:24:02,374 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:24:02,375 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:24:02,442 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:24:02,448 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 08:24:02,449 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:24:02,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 457 states, 397 states have (on average 1.6347607052896724) internal successors, (649), 405 states have internal predecessors, (649), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2022-01-10 08:24:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:24:02,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:02,497 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 08:24:02,498 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:02,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2009342201, now seen corresponding path program 1 times [2022-01-10 08:24:02,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:02,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945149899] [2022-01-10 08:24:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:02,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:02,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:02,518 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 08:24:02,522 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 08:24:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:02,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 08:24:02,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:02,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:02,875 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:02,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945149899] [2022-01-10 08:24:02,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945149899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:02,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:02,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:24:02,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75932939] [2022-01-10 08:24:02,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:02,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:02,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:02,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:02,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:02,917 INFO L87 Difference]: Start difference. First operand has 457 states, 397 states have (on average 1.6347607052896724) internal successors, (649), 405 states have internal predecessors, (649), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) 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 08:24:03,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:03,919 INFO L93 Difference]: Finished difference Result 1006 states and 1609 transitions. [2022-01-10 08:24:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:03,922 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 08:24:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:03,935 INFO L225 Difference]: With dead ends: 1006 [2022-01-10 08:24:03,936 INFO L226 Difference]: Without dead ends: 565 [2022-01-10 08:24:03,942 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 08:24:03,945 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 478 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:03,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1759 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-10 08:24:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-01-10 08:24:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 558. [2022-01-10 08:24:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 479 states have (on average 1.524008350730689) internal successors, (730), 486 states have internal predecessors, (730), 55 states have call successors, (55), 22 states have call predecessors, (55), 22 states have return successors, (56), 52 states have call predecessors, (56), 51 states have call successors, (56) [2022-01-10 08:24:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 841 transitions. [2022-01-10 08:24:04,066 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 841 transitions. Word has length 65 [2022-01-10 08:24:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:04,067 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 841 transitions. [2022-01-10 08:24:04,067 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 08:24:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 841 transitions. [2022-01-10 08:24:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:24:04,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:04,080 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 08:24:04,095 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 08:24:04,295 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 08:24:04,295 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:04,296 INFO L85 PathProgramCache]: Analyzing trace with hash -330453561, now seen corresponding path program 1 times [2022-01-10 08:24:04,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:04,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56017163] [2022-01-10 08:24:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:04,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:04,299 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 08:24:04,335 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 08:24:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:04,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:24:04,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:04,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:04,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:04,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56017163] [2022-01-10 08:24:04,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56017163] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:04,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:04,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:24:04,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856076206] [2022-01-10 08:24:04,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:04,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:04,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:04,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:04,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:04,569 INFO L87 Difference]: Start difference. First operand 558 states and 841 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 08:24:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:05,379 INFO L93 Difference]: Finished difference Result 1014 states and 1501 transitions. [2022-01-10 08:24:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:05,380 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 08:24:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:05,386 INFO L225 Difference]: With dead ends: 1014 [2022-01-10 08:24:05,386 INFO L226 Difference]: Without dead ends: 803 [2022-01-10 08:24:05,387 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 08:24:05,388 INFO L933 BasicCegarLoop]: 689 mSDtfsCounter, 465 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:05,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 1732 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-10 08:24:05,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-10 08:24:05,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 795. [2022-01-10 08:24:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 668 states have (on average 1.4820359281437125) internal successors, (990), 683 states have internal predecessors, (990), 81 states have call successors, (81), 36 states have call predecessors, (81), 44 states have return successors, (102), 80 states have call predecessors, (102), 77 states have call successors, (102) [2022-01-10 08:24:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1173 transitions. [2022-01-10 08:24:05,434 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1173 transitions. Word has length 65 [2022-01-10 08:24:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:05,435 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 1173 transitions. [2022-01-10 08:24:05,435 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 08:24:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1173 transitions. [2022-01-10 08:24:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:24:05,437 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:05,437 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 08:24:05,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-01-10 08:24:05,646 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 08:24:05,647 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:05,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:05,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1801914119, now seen corresponding path program 1 times [2022-01-10 08:24:05,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:05,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663428909] [2022-01-10 08:24:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:05,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:05,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:05,649 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 08:24:05,651 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 08:24:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:05,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:05,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:05,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:05,868 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663428909] [2022-01-10 08:24:05,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663428909] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:05,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:05,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:05,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365524298] [2022-01-10 08:24:05,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:05,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:05,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:05,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:05,870 INFO L87 Difference]: Start difference. First operand 795 states and 1173 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:24:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:05,940 INFO L93 Difference]: Finished difference Result 1631 states and 2330 transitions. [2022-01-10 08:24:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:05,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:24:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:05,947 INFO L225 Difference]: With dead ends: 1631 [2022-01-10 08:24:05,948 INFO L226 Difference]: Without dead ends: 1197 [2022-01-10 08:24:05,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:05,950 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 647 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:05,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 843 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2022-01-10 08:24:05,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1185. [2022-01-10 08:24:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 980 states have (on average 1.439795918367347) internal successors, (1411), 1005 states have internal predecessors, (1411), 121 states have call successors, (121), 64 states have call predecessors, (121), 82 states have return successors, (159), 120 states have call predecessors, (159), 117 states have call successors, (159) [2022-01-10 08:24:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1691 transitions. [2022-01-10 08:24:06,002 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1691 transitions. Word has length 65 [2022-01-10 08:24:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:06,003 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 1691 transitions. [2022-01-10 08:24:06,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:24:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1691 transitions. [2022-01-10 08:24:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:24:06,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:06,005 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 08:24:06,018 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 08:24:06,215 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 08:24:06,216 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:06,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:06,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1314055623, now seen corresponding path program 1 times [2022-01-10 08:24:06,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:06,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722739983] [2022-01-10 08:24:06,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:06,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:06,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:06,218 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 08:24:06,220 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 08:24:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:06,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:24:06,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:06,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:06,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:06,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722739983] [2022-01-10 08:24:06,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722739983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:06,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:06,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:24:06,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624195943] [2022-01-10 08:24:06,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:06,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:24:06,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:06,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:24:06,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:06,461 INFO L87 Difference]: Start difference. First operand 1185 states and 1691 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:24:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:06,552 INFO L93 Difference]: Finished difference Result 2049 states and 2885 transitions. [2022-01-10 08:24:06,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:06,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-01-10 08:24:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:06,558 INFO L225 Difference]: With dead ends: 2049 [2022-01-10 08:24:06,559 INFO L226 Difference]: Without dead ends: 1225 [2022-01-10 08:24:06,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:24:06,562 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 7 mSDsluCounter, 2725 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:06,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 3408 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:06,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2022-01-10 08:24:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1205. [2022-01-10 08:24:06,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 996 states have (on average 1.428714859437751) internal successors, (1423), 1021 states have internal predecessors, (1423), 121 states have call successors, (121), 64 states have call predecessors, (121), 86 states have return successors, (163), 124 states have call predecessors, (163), 117 states have call successors, (163) [2022-01-10 08:24:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1707 transitions. [2022-01-10 08:24:06,612 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1707 transitions. Word has length 66 [2022-01-10 08:24:06,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:06,612 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 1707 transitions. [2022-01-10 08:24:06,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:24:06,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1707 transitions. [2022-01-10 08:24:06,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:24:06,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:06,614 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 08:24:06,624 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 08:24:06,824 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 08:24:06,824 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:06,825 INFO L85 PathProgramCache]: Analyzing trace with hash 284696325, now seen corresponding path program 1 times [2022-01-10 08:24:06,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:06,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624693262] [2022-01-10 08:24:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:06,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:06,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:06,827 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 08:24:06,829 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 08:24:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:06,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:07,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:07,047 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:07,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624693262] [2022-01-10 08:24:07,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624693262] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:07,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:07,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:07,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211856105] [2022-01-10 08:24:07,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:07,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:07,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:07,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:07,048 INFO L87 Difference]: Start difference. First operand 1205 states and 1707 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:24:07,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:07,124 INFO L93 Difference]: Finished difference Result 2821 states and 3887 transitions. [2022-01-10 08:24:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:07,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-01-10 08:24:07,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:07,135 INFO L225 Difference]: With dead ends: 2821 [2022-01-10 08:24:07,135 INFO L226 Difference]: Without dead ends: 1977 [2022-01-10 08:24:07,138 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 08:24:07,140 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 633 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:07,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 822 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2022-01-10 08:24:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1961. [2022-01-10 08:24:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1592 states have (on average 1.3837939698492463) internal successors, (2203), 1637 states have internal predecessors, (2203), 201 states have call successors, (201), 120 states have call predecessors, (201), 166 states have return successors, (281), 208 states have call predecessors, (281), 197 states have call successors, (281) [2022-01-10 08:24:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2685 transitions. [2022-01-10 08:24:07,227 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2685 transitions. Word has length 66 [2022-01-10 08:24:07,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:07,227 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 2685 transitions. [2022-01-10 08:24:07,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:24:07,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2685 transitions. [2022-01-10 08:24:07,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 08:24:07,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:07,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:07,243 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 08:24:07,440 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 08:24:07,441 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:07,441 INFO L85 PathProgramCache]: Analyzing trace with hash -222202799, now seen corresponding path program 1 times [2022-01-10 08:24:07,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:07,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175376087] [2022-01-10 08:24:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:07,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:07,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:07,443 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 08:24:07,443 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 08:24:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:07,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:24:07,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 08:24:07,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:07,688 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:07,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175376087] [2022-01-10 08:24:07,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175376087] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:07,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:07,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:24:07,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145890113] [2022-01-10 08:24:07,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:07,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:24:07,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:07,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:24:07,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:07,690 INFO L87 Difference]: Start difference. First operand 1961 states and 2685 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 08:24:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:07,772 INFO L93 Difference]: Finished difference Result 3617 states and 4905 transitions. [2022-01-10 08:24:07,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:07,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 83 [2022-01-10 08:24:07,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:07,783 INFO L225 Difference]: With dead ends: 3617 [2022-01-10 08:24:07,784 INFO L226 Difference]: Without dead ends: 2017 [2022-01-10 08:24:07,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 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 08:24:07,791 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 4 mSDsluCounter, 2714 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:07,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 3394 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2022-01-10 08:24:07,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 2001. [2022-01-10 08:24:07,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 1624 states have (on average 1.3713054187192117) internal successors, (2227), 1669 states have internal predecessors, (2227), 201 states have call successors, (201), 120 states have call predecessors, (201), 174 states have return successors, (289), 216 states have call predecessors, (289), 197 states have call successors, (289) [2022-01-10 08:24:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 2717 transitions. [2022-01-10 08:24:07,880 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 2717 transitions. Word has length 83 [2022-01-10 08:24:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:07,882 INFO L470 AbstractCegarLoop]: Abstraction has 2001 states and 2717 transitions. [2022-01-10 08:24:07,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 08:24:07,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 2717 transitions. [2022-01-10 08:24:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 08:24:07,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:07,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:07,903 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 08:24:08,096 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 08:24:08,096 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash 671283539, now seen corresponding path program 1 times [2022-01-10 08:24:08,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:08,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788825540] [2022-01-10 08:24:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:08,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:08,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:08,098 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 08:24:08,099 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 08:24:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:08,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:08,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 08:24:08,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:08,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788825540] [2022-01-10 08:24:08,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788825540] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:08,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:08,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:08,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180444629] [2022-01-10 08:24:08,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:08,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:24:08,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:24:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:24:08,362 INFO L87 Difference]: Start difference. First operand 2001 states and 2717 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:24:08,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:08,739 INFO L93 Difference]: Finished difference Result 5237 states and 7020 transitions. [2022-01-10 08:24:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:08,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 83 [2022-01-10 08:24:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:08,758 INFO L225 Difference]: With dead ends: 5237 [2022-01-10 08:24:08,759 INFO L226 Difference]: Without dead ends: 3601 [2022-01-10 08:24:08,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:08,766 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 938 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:08,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 1046 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3601 states. [2022-01-10 08:24:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3601 to 3597. [2022-01-10 08:24:08,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 2864 states have (on average 1.3264664804469273) internal successors, (3799), 2957 states have internal predecessors, (3799), 381 states have call successors, (381), 232 states have call predecessors, (381), 350 states have return successors, (626), 416 states have call predecessors, (626), 377 states have call successors, (626) [2022-01-10 08:24:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 4806 transitions. [2022-01-10 08:24:08,938 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 4806 transitions. Word has length 83 [2022-01-10 08:24:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:08,938 INFO L470 AbstractCegarLoop]: Abstraction has 3597 states and 4806 transitions. [2022-01-10 08:24:08,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:24:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 4806 transitions. [2022-01-10 08:24:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 08:24:08,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:08,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:08,957 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 08:24:09,154 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 08:24:09,155 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:09,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:09,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1184618823, now seen corresponding path program 1 times [2022-01-10 08:24:09,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:09,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374489980] [2022-01-10 08:24:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:09,156 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:09,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:09,158 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 08:24:09,159 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 08:24:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:09,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:09,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:09,390 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 08:24:09,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:09,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:09,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374489980] [2022-01-10 08:24:09,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374489980] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:09,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:09,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:09,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895906570] [2022-01-10 08:24:09,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:09,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:09,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:09,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:09,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:09,393 INFO L87 Difference]: Start difference. First operand 3597 states and 4806 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:24:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:09,561 INFO L93 Difference]: Finished difference Result 9857 states and 13027 transitions. [2022-01-10 08:24:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2022-01-10 08:24:09,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:09,586 INFO L225 Difference]: With dead ends: 9857 [2022-01-10 08:24:09,586 INFO L226 Difference]: Without dead ends: 5165 [2022-01-10 08:24:09,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:09,601 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 116 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1474 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 08:24:09,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1474 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:09,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2022-01-10 08:24:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 5165. [2022-01-10 08:24:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5165 states, 4088 states have (on average 1.3099315068493151) internal successors, (5355), 4221 states have internal predecessors, (5355), 545 states have call successors, (545), 344 states have call predecessors, (545), 530 states have return successors, (958), 608 states have call predecessors, (958), 541 states have call successors, (958) [2022-01-10 08:24:09,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6858 transitions. [2022-01-10 08:24:09,843 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6858 transitions. Word has length 85 [2022-01-10 08:24:09,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:09,843 INFO L470 AbstractCegarLoop]: Abstraction has 5165 states and 6858 transitions. [2022-01-10 08:24:09,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:24:09,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6858 transitions. [2022-01-10 08:24:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 08:24:09,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:09,860 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:09,873 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 08:24:10,070 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 08:24:10,070 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:10,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:10,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1343837038, now seen corresponding path program 1 times [2022-01-10 08:24:10,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:10,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183546553] [2022-01-10 08:24:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:10,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:10,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:10,072 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 08:24:10,074 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 08:24:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:10,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:24:10,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 08:24:10,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:10,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:10,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183546553] [2022-01-10 08:24:10,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183546553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:10,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:10,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:24:10,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983521087] [2022-01-10 08:24:10,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:10,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:24:10,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:10,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:24:10,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:24:10,409 INFO L87 Difference]: Start difference. First operand 5165 states and 6858 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 08:24:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:10,574 INFO L93 Difference]: Finished difference Result 10011 states and 13302 transitions. [2022-01-10 08:24:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:24:10,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 155 [2022-01-10 08:24:10,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:10,598 INFO L225 Difference]: With dead ends: 10011 [2022-01-10 08:24:10,598 INFO L226 Difference]: Without dead ends: 5231 [2022-01-10 08:24:10,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:24:10,612 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 37 mSDsluCounter, 2719 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3401 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:10,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 3401 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:10,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5231 states. [2022-01-10 08:24:10,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5231 to 4685. [2022-01-10 08:24:10,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 3776 states have (on average 1.3000529661016949) internal successors, (4909), 3848 states have internal predecessors, (4909), 449 states have call successors, (449), 293 states have call predecessors, (449), 458 states have return successors, (815), 552 states have call predecessors, (815), 445 states have call successors, (815) [2022-01-10 08:24:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6173 transitions. [2022-01-10 08:24:10,855 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6173 transitions. Word has length 155 [2022-01-10 08:24:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:10,857 INFO L470 AbstractCegarLoop]: Abstraction has 4685 states and 6173 transitions. [2022-01-10 08:24:10,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 08:24:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6173 transitions. [2022-01-10 08:24:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 08:24:10,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:10,872 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:10,881 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 08:24:11,081 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 08:24:11,082 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:11,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:11,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1739095367, now seen corresponding path program 1 times [2022-01-10 08:24:11,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:11,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453682109] [2022-01-10 08:24:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:11,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:11,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:11,084 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 08:24:11,091 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 08:24:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:11,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:11,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-10 08:24:11,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:11,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:11,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453682109] [2022-01-10 08:24:11,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453682109] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:11,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:11,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:11,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210998145] [2022-01-10 08:24:11,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:11,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:11,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:11,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:11,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:11,420 INFO L87 Difference]: Start difference. First operand 4685 states and 6173 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:24:11,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:11,507 INFO L93 Difference]: Finished difference Result 7247 states and 9491 transitions. [2022-01-10 08:24:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:11,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 156 [2022-01-10 08:24:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:11,520 INFO L225 Difference]: With dead ends: 7247 [2022-01-10 08:24:11,520 INFO L226 Difference]: Without dead ends: 2991 [2022-01-10 08:24:11,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:11,531 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 148 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:11,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1205 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:11,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2022-01-10 08:24:11,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2991. [2022-01-10 08:24:11,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2424 states have (on average 1.3151815181518152) internal successors, (3188), 2470 states have internal predecessors, (3188), 273 states have call successors, (273), 181 states have call predecessors, (273), 292 states have return successors, (495), 340 states have call predecessors, (495), 269 states have call successors, (495) [2022-01-10 08:24:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 3956 transitions. [2022-01-10 08:24:11,675 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 3956 transitions. Word has length 156 [2022-01-10 08:24:11,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:11,675 INFO L470 AbstractCegarLoop]: Abstraction has 2991 states and 3956 transitions. [2022-01-10 08:24:11,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:24:11,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 3956 transitions. [2022-01-10 08:24:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 08:24:11,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:11,684 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:11,694 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 08:24:11,894 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 08:24:11,894 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:11,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:11,895 INFO L85 PathProgramCache]: Analyzing trace with hash 348168901, now seen corresponding path program 1 times [2022-01-10 08:24:11,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:11,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118826421] [2022-01-10 08:24:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:11,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:11,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:11,897 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 08:24:11,899 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 08:24:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:12,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:12,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 08:24:12,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:12,285 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:12,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118826421] [2022-01-10 08:24:12,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118826421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:12,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:12,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:12,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268562300] [2022-01-10 08:24:12,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:12,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:12,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:12,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:12,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:12,287 INFO L87 Difference]: Start difference. First operand 2991 states and 3956 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:24:12,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:12,399 INFO L93 Difference]: Finished difference Result 7113 states and 9439 transitions. [2022-01-10 08:24:12,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:12,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 159 [2022-01-10 08:24:12,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:12,426 INFO L225 Difference]: With dead ends: 7113 [2022-01-10 08:24:12,426 INFO L226 Difference]: Without dead ends: 4775 [2022-01-10 08:24:12,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:12,435 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 68 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:12,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1367 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:12,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4775 states. [2022-01-10 08:24:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4775 to 4747. [2022-01-10 08:24:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4747 states, 3842 states have (on average 1.305830296720458) internal successors, (5017), 3924 states have internal predecessors, (5017), 429 states have call successors, (429), 289 states have call predecessors, (429), 474 states have return successors, (804), 534 states have call predecessors, (804), 425 states have call successors, (804) [2022-01-10 08:24:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4747 states to 4747 states and 6250 transitions. [2022-01-10 08:24:12,673 INFO L78 Accepts]: Start accepts. Automaton has 4747 states and 6250 transitions. Word has length 159 [2022-01-10 08:24:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:12,674 INFO L470 AbstractCegarLoop]: Abstraction has 4747 states and 6250 transitions. [2022-01-10 08:24:12,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:24:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4747 states and 6250 transitions. [2022-01-10 08:24:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 08:24:12,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:12,686 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:12,698 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 08:24:12,896 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 08:24:12,896 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:12,897 INFO L85 PathProgramCache]: Analyzing trace with hash -660741531, now seen corresponding path program 1 times [2022-01-10 08:24:12,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:12,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905480713] [2022-01-10 08:24:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:12,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:12,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:12,899 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 08:24:12,901 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 08:24:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:13,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 08:24:13,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:13,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905480713] [2022-01-10 08:24:13,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905480713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:13,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:13,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:13,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547991329] [2022-01-10 08:24:13,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:13,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:13,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:13,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:13,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:13,270 INFO L87 Difference]: Start difference. First operand 4747 states and 6250 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:24:13,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:13,463 INFO L93 Difference]: Finished difference Result 12479 states and 16807 transitions. [2022-01-10 08:24:13,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:13,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 160 [2022-01-10 08:24:13,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:13,505 INFO L225 Difference]: With dead ends: 12479 [2022-01-10 08:24:13,505 INFO L226 Difference]: Without dead ends: 8385 [2022-01-10 08:24:13,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:13,522 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 102 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:13,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 1416 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8385 states. [2022-01-10 08:24:13,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8385 to 8309. [2022-01-10 08:24:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8309 states, 6704 states have (on average 1.2805787589498807) internal successors, (8585), 6836 states have internal predecessors, (8585), 765 states have call successors, (765), 523 states have call predecessors, (765), 838 states have return successors, (1602), 950 states have call predecessors, (1602), 761 states have call successors, (1602) [2022-01-10 08:24:13,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8309 states to 8309 states and 10952 transitions. [2022-01-10 08:24:13,861 INFO L78 Accepts]: Start accepts. Automaton has 8309 states and 10952 transitions. Word has length 160 [2022-01-10 08:24:13,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:13,861 INFO L470 AbstractCegarLoop]: Abstraction has 8309 states and 10952 transitions. [2022-01-10 08:24:13,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:24:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 8309 states and 10952 transitions. [2022-01-10 08:24:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 08:24:13,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:13,878 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:13,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:14,090 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 08:24:14,091 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:14,091 INFO L85 PathProgramCache]: Analyzing trace with hash 212403011, now seen corresponding path program 1 times [2022-01-10 08:24:14,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:14,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754218876] [2022-01-10 08:24:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:14,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:14,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:14,093 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 08:24:14,095 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 08:24:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:14,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 08:24:14,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:14,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:14,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754218876] [2022-01-10 08:24:14,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754218876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:14,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:14,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:14,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418785904] [2022-01-10 08:24:14,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:14,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:14,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:14,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:14,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:14,496 INFO L87 Difference]: Start difference. First operand 8309 states and 10952 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 08:24:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:14,844 INFO L93 Difference]: Finished difference Result 23479 states and 31167 transitions. [2022-01-10 08:24:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:14,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 161 [2022-01-10 08:24:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:14,910 INFO L225 Difference]: With dead ends: 23479 [2022-01-10 08:24:14,910 INFO L226 Difference]: Without dead ends: 15823 [2022-01-10 08:24:14,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:14,940 INFO L933 BasicCegarLoop]: 715 mSDtfsCounter, 72 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:14,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1376 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15823 states. [2022-01-10 08:24:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15823 to 15819. [2022-01-10 08:24:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15819 states, 12737 states have (on average 1.2652115882860957) internal successors, (16115), 12998 states have internal predecessors, (16115), 1473 states have call successors, (1473), 1009 states have call predecessors, (1473), 1607 states have return successors, (3076), 1812 states have call predecessors, (3076), 1469 states have call successors, (3076) [2022-01-10 08:24:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15819 states to 15819 states and 20664 transitions. [2022-01-10 08:24:15,615 INFO L78 Accepts]: Start accepts. Automaton has 15819 states and 20664 transitions. Word has length 161 [2022-01-10 08:24:15,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:15,616 INFO L470 AbstractCegarLoop]: Abstraction has 15819 states and 20664 transitions. [2022-01-10 08:24:15,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 08:24:15,616 INFO L276 IsEmpty]: Start isEmpty. Operand 15819 states and 20664 transitions. [2022-01-10 08:24:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 08:24:15,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:15,640 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:15,652 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 08:24:15,850 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 08:24:15,850 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:15,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1064230903, now seen corresponding path program 1 times [2022-01-10 08:24:15,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:15,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436327020] [2022-01-10 08:24:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:15,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:15,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:15,853 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 08:24:15,855 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 08:24:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:15,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:15,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-01-10 08:24:16,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:16,273 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:16,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436327020] [2022-01-10 08:24:16,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436327020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:16,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:16,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:16,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851469542] [2022-01-10 08:24:16,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:16,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:16,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:16,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:16,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:16,275 INFO L87 Difference]: Start difference. First operand 15819 states and 20664 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:24:17,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:17,653 INFO L93 Difference]: Finished difference Result 45372 states and 59318 transitions. [2022-01-10 08:24:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:24:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 166 [2022-01-10 08:24:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:17,790 INFO L225 Difference]: With dead ends: 45372 [2022-01-10 08:24:17,790 INFO L226 Difference]: Without dead ends: 29891 [2022-01-10 08:24:17,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 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 08:24:17,843 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 961 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:17,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 1352 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 08:24:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29891 states. [2022-01-10 08:24:18,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29891 to 29715. [2022-01-10 08:24:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29715 states, 23727 states have (on average 1.255531672777848) internal successors, (29790), 24211 states have internal predecessors, (29790), 2868 states have call successors, (2868), 1960 states have call predecessors, (2868), 3118 states have return successors, (5870), 3544 states have call predecessors, (5870), 2864 states have call successors, (5870) [2022-01-10 08:24:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29715 states to 29715 states and 38528 transitions. [2022-01-10 08:24:19,066 INFO L78 Accepts]: Start accepts. Automaton has 29715 states and 38528 transitions. Word has length 166 [2022-01-10 08:24:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:19,067 INFO L470 AbstractCegarLoop]: Abstraction has 29715 states and 38528 transitions. [2022-01-10 08:24:19,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:24:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 29715 states and 38528 transitions. [2022-01-10 08:24:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:19,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:19,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:19,099 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 08:24:19,294 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 08:24:19,294 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:19,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:19,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2058139820, now seen corresponding path program 1 times [2022-01-10 08:24:19,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:19,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364569543] [2022-01-10 08:24:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:19,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:19,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:19,297 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 08:24:19,299 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 08:24:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:19,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:19,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:19,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:19,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364569543] [2022-01-10 08:24:19,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364569543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:19,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:19,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:19,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132685712] [2022-01-10 08:24:19,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:19,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:19,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:19,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:19,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:19,675 INFO L87 Difference]: Start difference. First operand 29715 states and 38528 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:20,242 INFO L93 Difference]: Finished difference Result 30042 states and 39043 transitions. [2022-01-10 08:24:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:20,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:20,362 INFO L225 Difference]: With dead ends: 30042 [2022-01-10 08:24:20,362 INFO L226 Difference]: Without dead ends: 29715 [2022-01-10 08:24:20,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:20,380 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 516 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:20,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 835 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:20,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29715 states. [2022-01-10 08:24:21,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29715 to 29715. [2022-01-10 08:24:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29715 states, 23727 states have (on average 1.2554895266995405) internal successors, (29789), 24211 states have internal predecessors, (29789), 2868 states have call successors, (2868), 1960 states have call predecessors, (2868), 3118 states have return successors, (5870), 3544 states have call predecessors, (5870), 2864 states have call successors, (5870) [2022-01-10 08:24:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29715 states to 29715 states and 38527 transitions. [2022-01-10 08:24:21,331 INFO L78 Accepts]: Start accepts. Automaton has 29715 states and 38527 transitions. Word has length 157 [2022-01-10 08:24:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:21,331 INFO L470 AbstractCegarLoop]: Abstraction has 29715 states and 38527 transitions. [2022-01-10 08:24:21,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:21,332 INFO L276 IsEmpty]: Start isEmpty. Operand 29715 states and 38527 transitions. [2022-01-10 08:24:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:21,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:21,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:21,361 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 08:24:21,556 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 08:24:21,558 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1972179986, now seen corresponding path program 1 times [2022-01-10 08:24:21,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:21,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269701492] [2022-01-10 08:24:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:21,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:21,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:21,560 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 08:24:21,562 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 08:24:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:21,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:24:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:21,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:21,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:21,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269701492] [2022-01-10 08:24:21,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269701492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:21,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:21,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:24:21,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831218437] [2022-01-10 08:24:21,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:21,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:24:21,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:21,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:24:21,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:21,915 INFO L87 Difference]: Start difference. First operand 29715 states and 38527 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:22,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:22,518 INFO L93 Difference]: Finished difference Result 30034 states and 39026 transitions. [2022-01-10 08:24:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:24:22,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:22,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:22,624 INFO L225 Difference]: With dead ends: 30034 [2022-01-10 08:24:22,624 INFO L226 Difference]: Without dead ends: 29715 [2022-01-10 08:24:22,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:24:22,645 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 507 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:22,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 834 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:24:22,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29715 states. [2022-01-10 08:24:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29715 to 29715. [2022-01-10 08:24:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29715 states, 23727 states have (on average 1.2554473806212332) internal successors, (29788), 24211 states have internal predecessors, (29788), 2868 states have call successors, (2868), 1960 states have call predecessors, (2868), 3118 states have return successors, (5870), 3544 states have call predecessors, (5870), 2864 states have call successors, (5870) [2022-01-10 08:24:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29715 states to 29715 states and 38526 transitions. [2022-01-10 08:24:23,837 INFO L78 Accepts]: Start accepts. Automaton has 29715 states and 38526 transitions. Word has length 157 [2022-01-10 08:24:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:23,837 INFO L470 AbstractCegarLoop]: Abstraction has 29715 states and 38526 transitions. [2022-01-10 08:24:23,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 29715 states and 38526 transitions. [2022-01-10 08:24:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:23,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:23,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:23,864 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 08:24:24,061 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 08:24:24,063 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:24,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1912176944, now seen corresponding path program 1 times [2022-01-10 08:24:24,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:24,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669465864] [2022-01-10 08:24:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:24,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:24,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:24,065 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 08:24:24,068 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 08:24:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:24,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:24,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:24,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:24,454 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:24,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669465864] [2022-01-10 08:24:24,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669465864] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:24,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:24,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:24,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541901907] [2022-01-10 08:24:24,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:24,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:24,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:24,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:24,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:24,456 INFO L87 Difference]: Start difference. First operand 29715 states and 38526 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:25,643 INFO L93 Difference]: Finished difference Result 30387 states and 39596 transitions. [2022-01-10 08:24:25,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:24:25,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:25,754 INFO L225 Difference]: With dead ends: 30387 [2022-01-10 08:24:25,754 INFO L226 Difference]: Without dead ends: 30071 [2022-01-10 08:24:25,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 08:24:25,774 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 1189 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1219 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:25,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1219 Valid, 1881 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 08:24:25,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30071 states. [2022-01-10 08:24:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30071 to 30044. [2022-01-10 08:24:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30044 states, 24030 states have (on average 1.259758635039534) internal successors, (30272), 24515 states have internal predecessors, (30272), 2887 states have call successors, (2887), 1966 states have call predecessors, (2887), 3125 states have return successors, (5890), 3563 states have call predecessors, (5890), 2883 states have call successors, (5890) [2022-01-10 08:24:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 39049 transitions. [2022-01-10 08:24:26,770 INFO L78 Accepts]: Start accepts. Automaton has 30044 states and 39049 transitions. Word has length 157 [2022-01-10 08:24:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:26,771 INFO L470 AbstractCegarLoop]: Abstraction has 30044 states and 39049 transitions. [2022-01-10 08:24:26,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 30044 states and 39049 transitions. [2022-01-10 08:24:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:26,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:26,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:26,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 08:24:26,993 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 08:24:26,993 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:26,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:26,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1716755156, now seen corresponding path program 1 times [2022-01-10 08:24:26,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:26,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50368883] [2022-01-10 08:24:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:26,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:26,996 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 08:24:26,998 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 08:24:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:27,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:27,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:27,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:27,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50368883] [2022-01-10 08:24:27,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50368883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:27,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:27,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:27,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35862753] [2022-01-10 08:24:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:27,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:27,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:27,351 INFO L87 Difference]: Start difference. First operand 30044 states and 39049 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:28,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:28,530 INFO L93 Difference]: Finished difference Result 30689 states and 40073 transitions. [2022-01-10 08:24:28,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:28,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:28,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:28,626 INFO L225 Difference]: With dead ends: 30689 [2022-01-10 08:24:28,626 INFO L226 Difference]: Without dead ends: 30044 [2022-01-10 08:24:28,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 08:24:28,641 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 901 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:28,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 1338 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2022-01-10 08:24:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 30044. [2022-01-10 08:24:29,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30044 states, 24030 states have (on average 1.2594673325010404) internal successors, (30265), 24515 states have internal predecessors, (30265), 2887 states have call successors, (2887), 1966 states have call predecessors, (2887), 3125 states have return successors, (5890), 3563 states have call predecessors, (5890), 2883 states have call successors, (5890) [2022-01-10 08:24:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 39042 transitions. [2022-01-10 08:24:29,591 INFO L78 Accepts]: Start accepts. Automaton has 30044 states and 39042 transitions. Word has length 157 [2022-01-10 08:24:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:29,591 INFO L470 AbstractCegarLoop]: Abstraction has 30044 states and 39042 transitions. [2022-01-10 08:24:29,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 30044 states and 39042 transitions. [2022-01-10 08:24:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:29,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:29,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:29,618 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 08:24:29,811 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 08:24:29,811 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash -317801554, now seen corresponding path program 1 times [2022-01-10 08:24:29,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:29,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744612001] [2022-01-10 08:24:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:29,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:29,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:29,814 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 08:24:29,815 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 08:24:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:29,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:29,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:30,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:30,142 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:30,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744612001] [2022-01-10 08:24:30,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744612001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:30,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:30,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:30,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654832324] [2022-01-10 08:24:30,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:30,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:30,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:30,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:30,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:30,144 INFO L87 Difference]: Start difference. First operand 30044 states and 39042 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:31,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:31,158 INFO L93 Difference]: Finished difference Result 30689 states and 40059 transitions. [2022-01-10 08:24:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:31,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:31,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:31,227 INFO L225 Difference]: With dead ends: 30689 [2022-01-10 08:24:31,227 INFO L226 Difference]: Without dead ends: 30044 [2022-01-10 08:24:31,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 08:24:31,237 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 895 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:31,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 1331 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:31,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2022-01-10 08:24:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 30044. [2022-01-10 08:24:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30044 states, 24030 states have (on average 1.2591760299625467) internal successors, (30258), 24515 states have internal predecessors, (30258), 2887 states have call successors, (2887), 1966 states have call predecessors, (2887), 3125 states have return successors, (5890), 3563 states have call predecessors, (5890), 2883 states have call successors, (5890) [2022-01-10 08:24:32,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 39035 transitions. [2022-01-10 08:24:32,281 INFO L78 Accepts]: Start accepts. Automaton has 30044 states and 39035 transitions. Word has length 157 [2022-01-10 08:24:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:32,281 INFO L470 AbstractCegarLoop]: Abstraction has 30044 states and 39035 transitions. [2022-01-10 08:24:32,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 30044 states and 39035 transitions. [2022-01-10 08:24:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:32,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:32,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:32,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 08:24:32,503 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 08:24:32,503 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:32,504 INFO L85 PathProgramCache]: Analyzing trace with hash 987917994, now seen corresponding path program 1 times [2022-01-10 08:24:32,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:32,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250419245] [2022-01-10 08:24:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:32,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:32,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:32,505 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 08:24:32,506 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 08:24:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:32,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:32,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:32,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:32,851 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:32,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250419245] [2022-01-10 08:24:32,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250419245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:32,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:32,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:32,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954703631] [2022-01-10 08:24:32,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:32,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:32,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:32,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:32,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:32,853 INFO L87 Difference]: Start difference. First operand 30044 states and 39035 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:33,864 INFO L93 Difference]: Finished difference Result 30689 states and 40045 transitions. [2022-01-10 08:24:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:33,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:33,939 INFO L225 Difference]: With dead ends: 30689 [2022-01-10 08:24:33,939 INFO L226 Difference]: Without dead ends: 30044 [2022-01-10 08:24:33,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 08:24:33,954 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 889 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:33,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 1324 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2022-01-10 08:24:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 30044. [2022-01-10 08:24:34,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30044 states, 24030 states have (on average 1.2588847274240533) internal successors, (30251), 24515 states have internal predecessors, (30251), 2887 states have call successors, (2887), 1966 states have call predecessors, (2887), 3125 states have return successors, (5890), 3563 states have call predecessors, (5890), 2883 states have call successors, (5890) [2022-01-10 08:24:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 39028 transitions. [2022-01-10 08:24:34,941 INFO L78 Accepts]: Start accepts. Automaton has 30044 states and 39028 transitions. Word has length 157 [2022-01-10 08:24:34,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:34,941 INFO L470 AbstractCegarLoop]: Abstraction has 30044 states and 39028 transitions. [2022-01-10 08:24:34,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:34,941 INFO L276 IsEmpty]: Start isEmpty. Operand 30044 states and 39028 transitions. [2022-01-10 08:24:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:34,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:34,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:34,957 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 08:24:35,150 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 08:24:35,150 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:35,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:35,151 INFO L85 PathProgramCache]: Analyzing trace with hash -493982674, now seen corresponding path program 1 times [2022-01-10 08:24:35,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:35,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789255825] [2022-01-10 08:24:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:35,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:35,152 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 08:24:35,153 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 08:24:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:35,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:35,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:35,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:35,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789255825] [2022-01-10 08:24:35,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789255825] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:35,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:35,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:35,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327046345] [2022-01-10 08:24:35,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:35,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:35,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:35,495 INFO L87 Difference]: Start difference. First operand 30044 states and 39028 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:36,669 INFO L93 Difference]: Finished difference Result 30689 states and 40031 transitions. [2022-01-10 08:24:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:36,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:36,746 INFO L225 Difference]: With dead ends: 30689 [2022-01-10 08:24:36,747 INFO L226 Difference]: Without dead ends: 30044 [2022-01-10 08:24:36,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 08:24:36,762 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 883 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:36,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [913 Valid, 1317 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:36,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2022-01-10 08:24:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 30044. [2022-01-10 08:24:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30044 states, 24030 states have (on average 1.2585934248855597) internal successors, (30244), 24515 states have internal predecessors, (30244), 2887 states have call successors, (2887), 1966 states have call predecessors, (2887), 3125 states have return successors, (5890), 3563 states have call predecessors, (5890), 2883 states have call successors, (5890) [2022-01-10 08:24:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 39021 transitions. [2022-01-10 08:24:37,778 INFO L78 Accepts]: Start accepts. Automaton has 30044 states and 39021 transitions. Word has length 157 [2022-01-10 08:24:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:37,778 INFO L470 AbstractCegarLoop]: Abstraction has 30044 states and 39021 transitions. [2022-01-10 08:24:37,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 30044 states and 39021 transitions. [2022-01-10 08:24:37,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:37,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:37,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:37,794 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 08:24:37,987 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 08:24:37,987 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:37,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:37,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1234522582, now seen corresponding path program 1 times [2022-01-10 08:24:37,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:37,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914392915] [2022-01-10 08:24:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:37,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:37,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:37,990 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 08:24:37,992 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 08:24:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:38,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:38,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:38,341 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:38,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914392915] [2022-01-10 08:24:38,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914392915] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:38,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:38,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:38,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415277557] [2022-01-10 08:24:38,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:38,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:38,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:38,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:38,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:38,342 INFO L87 Difference]: Start difference. First operand 30044 states and 39021 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:39,386 INFO L93 Difference]: Finished difference Result 30689 states and 40017 transitions. [2022-01-10 08:24:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:39,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:39,461 INFO L225 Difference]: With dead ends: 30689 [2022-01-10 08:24:39,462 INFO L226 Difference]: Without dead ends: 30044 [2022-01-10 08:24:39,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 08:24:39,478 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 877 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:39,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [907 Valid, 1310 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2022-01-10 08:24:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 30044. [2022-01-10 08:24:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30044 states, 24030 states have (on average 1.258302122347066) internal successors, (30237), 24515 states have internal predecessors, (30237), 2887 states have call successors, (2887), 1966 states have call predecessors, (2887), 3125 states have return successors, (5890), 3563 states have call predecessors, (5890), 2883 states have call successors, (5890) [2022-01-10 08:24:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 39014 transitions. [2022-01-10 08:24:40,552 INFO L78 Accepts]: Start accepts. Automaton has 30044 states and 39014 transitions. Word has length 157 [2022-01-10 08:24:40,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:40,553 INFO L470 AbstractCegarLoop]: Abstraction has 30044 states and 39014 transitions. [2022-01-10 08:24:40,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 30044 states and 39014 transitions. [2022-01-10 08:24:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:40,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:40,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:40,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-01-10 08:24:40,761 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 08:24:40,762 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:40,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:40,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1119863634, now seen corresponding path program 1 times [2022-01-10 08:24:40,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:40,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700908504] [2022-01-10 08:24:40,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:40,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:40,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:40,764 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 08:24:40,765 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 08:24:40,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:40,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:40,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:41,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:41,091 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:41,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700908504] [2022-01-10 08:24:41,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700908504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:41,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:41,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:41,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510090545] [2022-01-10 08:24:41,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:41,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:41,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:41,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:41,092 INFO L87 Difference]: Start difference. First operand 30044 states and 39014 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:42,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:42,346 INFO L93 Difference]: Finished difference Result 30689 states and 40003 transitions. [2022-01-10 08:24:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:42,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:42,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:42,426 INFO L225 Difference]: With dead ends: 30689 [2022-01-10 08:24:42,426 INFO L226 Difference]: Without dead ends: 30044 [2022-01-10 08:24:42,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 08:24:42,444 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 870 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:42,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 1303 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2022-01-10 08:24:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 30044. [2022-01-10 08:24:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30044 states, 24030 states have (on average 1.2580108198085727) internal successors, (30230), 24515 states have internal predecessors, (30230), 2887 states have call successors, (2887), 1966 states have call predecessors, (2887), 3125 states have return successors, (5890), 3563 states have call predecessors, (5890), 2883 states have call successors, (5890) [2022-01-10 08:24:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 39007 transitions. [2022-01-10 08:24:43,540 INFO L78 Accepts]: Start accepts. Automaton has 30044 states and 39007 transitions. Word has length 157 [2022-01-10 08:24:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:43,540 INFO L470 AbstractCegarLoop]: Abstraction has 30044 states and 39007 transitions. [2022-01-10 08:24:43,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 30044 states and 39007 transitions. [2022-01-10 08:24:43,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:43,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:43,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:43,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 08:24:43,755 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 08:24:43,756 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:43,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1383046194, now seen corresponding path program 1 times [2022-01-10 08:24:43,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:43,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51741746] [2022-01-10 08:24:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:43,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:43,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:43,757 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 08:24:43,759 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 08:24:43,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:43,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:44,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:44,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:44,198 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:44,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51741746] [2022-01-10 08:24:44,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51741746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:44,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:44,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:44,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119721449] [2022-01-10 08:24:44,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:44,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:44,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:44,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:44,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:44,202 INFO L87 Difference]: Start difference. First operand 30044 states and 39007 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:45,404 INFO L93 Difference]: Finished difference Result 30689 states and 39989 transitions. [2022-01-10 08:24:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:45,405 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:45,471 INFO L225 Difference]: With dead ends: 30689 [2022-01-10 08:24:45,471 INFO L226 Difference]: Without dead ends: 30044 [2022-01-10 08:24:45,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 08:24:45,481 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 864 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:45,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 1296 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2022-01-10 08:24:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 30044. [2022-01-10 08:24:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30044 states, 24030 states have (on average 1.257719517270079) internal successors, (30223), 24515 states have internal predecessors, (30223), 2887 states have call successors, (2887), 1966 states have call predecessors, (2887), 3125 states have return successors, (5890), 3563 states have call predecessors, (5890), 2883 states have call successors, (5890) [2022-01-10 08:24:46,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 39000 transitions. [2022-01-10 08:24:46,637 INFO L78 Accepts]: Start accepts. Automaton has 30044 states and 39000 transitions. Word has length 157 [2022-01-10 08:24:46,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:46,637 INFO L470 AbstractCegarLoop]: Abstraction has 30044 states and 39000 transitions. [2022-01-10 08:24:46,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 30044 states and 39000 transitions. [2022-01-10 08:24:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:46,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:46,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:46,659 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 08:24:46,858 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 08:24:46,858 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:46,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1445708754, now seen corresponding path program 1 times [2022-01-10 08:24:46,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:46,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39306058] [2022-01-10 08:24:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:46,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:46,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:46,860 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 08:24:46,861 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 08:24:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:46,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:46,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:47,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:47,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:47,189 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:47,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39306058] [2022-01-10 08:24:47,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39306058] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:47,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:47,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:47,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035236618] [2022-01-10 08:24:47,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:47,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:47,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:47,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:47,190 INFO L87 Difference]: Start difference. First operand 30044 states and 39000 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:48,370 INFO L93 Difference]: Finished difference Result 30689 states and 39975 transitions. [2022-01-10 08:24:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:48,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:48,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:48,432 INFO L225 Difference]: With dead ends: 30689 [2022-01-10 08:24:48,433 INFO L226 Difference]: Without dead ends: 30044 [2022-01-10 08:24:48,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 08:24:48,444 INFO L933 BasicCegarLoop]: 614 mSDtfsCounter, 858 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:48,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 1289 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:24:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2022-01-10 08:24:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 30044. [2022-01-10 08:24:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30044 states, 24030 states have (on average 1.2574282147315856) internal successors, (30216), 24515 states have internal predecessors, (30216), 2887 states have call successors, (2887), 1966 states have call predecessors, (2887), 3125 states have return successors, (5890), 3563 states have call predecessors, (5890), 2883 states have call successors, (5890) [2022-01-10 08:24:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 38993 transitions. [2022-01-10 08:24:49,755 INFO L78 Accepts]: Start accepts. Automaton has 30044 states and 38993 transitions. Word has length 157 [2022-01-10 08:24:49,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:49,756 INFO L470 AbstractCegarLoop]: Abstraction has 30044 states and 38993 transitions. [2022-01-10 08:24:49,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:49,756 INFO L276 IsEmpty]: Start isEmpty. Operand 30044 states and 38993 transitions. [2022-01-10 08:24:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:49,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:49,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:49,780 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 08:24:49,977 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 08:24:49,978 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:49,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:49,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1880214352, now seen corresponding path program 1 times [2022-01-10 08:24:49,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:49,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043285041] [2022-01-10 08:24:49,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:49,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:49,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:49,980 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 08:24:50,051 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 08:24:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:50,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:50,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:50,367 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:50,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043285041] [2022-01-10 08:24:50,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043285041] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:50,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:50,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:50,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915931166] [2022-01-10 08:24:50,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:50,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:50,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:50,369 INFO L87 Difference]: Start difference. First operand 30044 states and 38993 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:51,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:51,713 INFO L93 Difference]: Finished difference Result 30689 states and 39961 transitions. [2022-01-10 08:24:51,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:24:51,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:51,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:51,791 INFO L225 Difference]: With dead ends: 30689 [2022-01-10 08:24:51,791 INFO L226 Difference]: Without dead ends: 30044 [2022-01-10 08:24:51,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 08:24:51,807 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 852 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:51,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 1282 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:24:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30044 states. [2022-01-10 08:24:52,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30044 to 30044. [2022-01-10 08:24:52,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30044 states, 24030 states have (on average 1.257136912193092) internal successors, (30209), 24515 states have internal predecessors, (30209), 2887 states have call successors, (2887), 1966 states have call predecessors, (2887), 3125 states have return successors, (5890), 3563 states have call predecessors, (5890), 2883 states have call successors, (5890) [2022-01-10 08:24:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30044 states to 30044 states and 38986 transitions. [2022-01-10 08:24:53,022 INFO L78 Accepts]: Start accepts. Automaton has 30044 states and 38986 transitions. Word has length 157 [2022-01-10 08:24:53,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:53,022 INFO L470 AbstractCegarLoop]: Abstraction has 30044 states and 38986 transitions. [2022-01-10 08:24:53,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 30044 states and 38986 transitions. [2022-01-10 08:24:53,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:53,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:53,032 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:53,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-01-10 08:24:53,242 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 08:24:53,242 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:53,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:53,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2035113044, now seen corresponding path program 1 times [2022-01-10 08:24:53,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:53,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606480073] [2022-01-10 08:24:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:53,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:53,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:53,244 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 08:24:53,245 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 08:24:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:53,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:53,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:53,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:53,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606480073] [2022-01-10 08:24:53,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606480073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:53,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:53,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:53,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448065951] [2022-01-10 08:24:53,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:53,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:53,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:53,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:53,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:53,574 INFO L87 Difference]: Start difference. First operand 30044 states and 38986 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:24:55,155 INFO L93 Difference]: Finished difference Result 30853 states and 40201 transitions. [2022-01-10 08:24:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:24:55,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 157 [2022-01-10 08:24:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:24:55,242 INFO L225 Difference]: With dead ends: 30853 [2022-01-10 08:24:55,242 INFO L226 Difference]: Without dead ends: 30208 [2022-01-10 08:24:55,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 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 08:24:55,256 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 952 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-10 08:24:55,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 1274 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-10 08:24:55,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30208 states. [2022-01-10 08:24:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30208 to 30208. [2022-01-10 08:24:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30208 states, 24188 states have (on average 1.2578137919629568) internal successors, (30424), 24673 states have internal predecessors, (30424), 2889 states have call successors, (2889), 1970 states have call predecessors, (2889), 3129 states have return successors, (5892), 3565 states have call predecessors, (5892), 2885 states have call successors, (5892) [2022-01-10 08:24:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30208 states to 30208 states and 39205 transitions. [2022-01-10 08:24:56,853 INFO L78 Accepts]: Start accepts. Automaton has 30208 states and 39205 transitions. Word has length 157 [2022-01-10 08:24:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:24:56,853 INFO L470 AbstractCegarLoop]: Abstraction has 30208 states and 39205 transitions. [2022-01-10 08:24:56,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:24:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 30208 states and 39205 transitions. [2022-01-10 08:24:56,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-10 08:24:56,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:24:56,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:24:56,869 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 08:24:57,062 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 08:24:57,063 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:24:57,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:24:57,063 INFO L85 PathProgramCache]: Analyzing trace with hash -2040109776, now seen corresponding path program 1 times [2022-01-10 08:24:57,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:24:57,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205004013] [2022-01-10 08:24:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:24:57,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:24:57,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:24:57,065 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 08:24:57,066 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 08:24:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:24:57,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:24:57,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:24:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:24:57,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:24:57,389 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:24:57,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205004013] [2022-01-10 08:24:57,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205004013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:24:57,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:24:57,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:24:57,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714298068] [2022-01-10 08:24:57,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:24:57,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:24:57,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:24:57,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:24:57,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:24:57,390 INFO L87 Difference]: Start difference. First operand 30208 states and 39205 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)